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Invalid Content-Type:application/xml, Soap Server responding with HTTP 500 error

I have created a Soap Endpoint based on Client's request and that endpoint currently works with Content-Type:text/xml. But Client wants to send Content-Type as application/xml. I cannot ask client to change their content-type and I have to fix my server endpoint to work according to client using Spring boot. Please help and let me know, how can I fix the endpoint so that it can accept application/xml. Thanks in advance. Below is my Stacktrace:
[2021-08-23 12:38:40,255] ERROR [c.s.x.m.s.soap] SAAJ0537: Invalid Content-Type. Could be an error message instead of a SOAP message
[2021-08-23 12:38:40,264] ERROR [o.s.b.w.s.s.ErrorPageFilter] Forwarding to error page from request [/v1/serverEndpoint] due to exception [Could not create message from InputStream: Invalid Content-Type:application/xml. Is this an error message instead of a SOAP response?; nested exception is com.sun.xml.messaging.saaj.SOAPExceptionImpl: Invalid Content-Type:application/xml. Is this an error message instead of a SOAP response?]
org.springframework.ws.soap.SoapMessageCreationException: Could not create message from InputStream: Invalid Content-Type:application/xml. Is this an error message instead of a SOAP response?; nested exception is com.sun.xml.messaging.saaj.SOAPExceptionImpl: Invalid Content-Type:application/xml. Is this an error message instead of a SOAP response?
at org.springframework.ws.soap.saaj.SaajSoapMessageFactory.createWebServiceMessage(SaajSoapMessageFactory.java:218) ~[spring-ws-core-3.0.7.RELEASE.jar:?]
at org.springframework.ws.soap.saaj.SaajSoapMessageFactory.createWebServiceMessage(SaajSoapMessageFactory.java:62) ~[spring-ws-core-3.0.7.RELEASE.jar:?]
at org.springframework.ws.transport.AbstractWebServiceConnection.receive(AbstractWebServiceConnection.java:92) ~[spring-ws-core-3.0.7.RELEASE.jar:?]
at org.springframework.ws.transport.support.WebServiceMessageReceiverObjectSupport.handleConnection(WebServiceMessageReceiverObjectSupport.java:87) ~[spring-ws-core-3.0.7.RELEASE.jar:?]
at org.springframework.ws.transport.http.WebServiceMessageReceiverHandlerAdapter.handle(WebServiceMessageReceiverHandlerAdapter.java:61) ~[spring-ws-core-3.0.7.RELEASE.jar:?]
at org.springframework.ws.transport.http.MessageDispatcherServlet.doService(MessageDispatcherServlet.java:293) ~[spring-ws-core-3.0.7.RELEASE.jar:?]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) ~[servlet-api.jar:?]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ~[spring-webmvc-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[servlet-api.jar:?]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[catalina.jar:8.5.53]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[catalina.jar:8.5.53]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-websocket.jar:8.5.53]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[catalina.jar:8.5.53]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[catalina.jar:8.5.53]
at org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:88) ~[spring-boot-actuator-2.1.6.RELEASE.jar:2.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[catalina.jar:8.5.53]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[catalina.jar:8.5.53]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[catalina.jar:8.5.53]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[catalina.jar:8.5.53]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[catalina.jar:8.5.53]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[catalina.jar:8.5.53]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[catalina.jar:8.5.53]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[catalina.jar:8.5.53]
at org.springframework.boot.web.servlet.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:128) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
at org.springframework.boot.web.servlet.support.ErrorPageFilter.access$000(ErrorPageFilter.java:66) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
at org.springframework.boot.web.servlet.support.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:103) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.boot.web.servlet.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:121) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:8.5.53]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:8.5.53]
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:114) [spring-boot-actuator-2.1.6.RELEASE.jar:2.1.6.RELEASE]
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:104) [spring-boot-actuator-2.1.6.RELEASE.jar:2.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:8.5.53]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:8.5.53]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) [spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
Caused by: com.sun.xml.messaging.saaj.SOAPExceptionImpl: Invalid Content-Type:application/xml. Is this an error message instead of a SOAP response?
at com.sun.xml.messaging.saaj.soap.MessageImpl.identifyContentType(MessageImpl.java:740) ~[saaj-impl-1.5.0.jar:?]
at com.sun.xml.messaging.saaj.soap.MessageImpl.<init>(MessageImpl.java:331) ~[saaj-impl-1.5.0.jar:?]
at com.sun.xml.messaging.saaj.soap.ver1_2.Message1_2Impl.<init>(Message1_2Impl.java:74) ~[saaj-impl-1.5.0.jar:?]
at com.sun.xml.messaging.saaj.soap.ver1_2.SOAPMessageFactory1_2Impl.createMessage(SOAPMessageFactory1_2Impl.java:81) ~[saaj-impl-1.5.0.jar:?]
at org.springframework.ws.soap.saaj.SaajSoapMessageFactory.createWebServiceMessage(SaajSoapMessageFactory.java:190) ~[spring-ws-core-3.0.7.RELEASE.jar:?]
Endpoint code:
#Endpoint
public class RequestEndpoint {
#PayloadRoot(namespace = "http://www.networks.com/RoR", localPart = "Submit")
#ResponsePayload
public SResponse handleRequest(#RequestPayload Submitrequest) throws URISyntaxException, IOException {
SResponse sResponse = new SResponse();
sResponse.setCommandStatus("0");
return sResponse;
}

Since I don't have control over the header that client sends, I have created a workaround. I have created a bean for SaajSoapMessageFactory and passed a CustomSOAPMessageFactoryImpl which actually validates the "content-type" header. In CustomSOAPMessageFactoryImpl, I am overriding a method that validates the header. Here, there is an if condition which add/updates the content-type header's value as text/xml if the value is empty or "application/xml" respectively. This solution is working fine for me.
#Bean
public SaajSoapMessageFactory messageFactory() {
SaajSoapMessageFactory saajSoapMessageFactory = new SaajSoapMessageFactory();
saajSoapMessageFactory.setMessageFactory(new CustomSOAPMessageFactoryImpl());
return saajSoapMessageFactory;
}
Below is the CustomSOAPMessageFactoryImpl:
import java.io.IOException;
import java.io.InputStream;
import javax.xml.soap.MimeHeaders;
import javax.xml.soap.SOAPConstants;
import javax.xml.soap.SOAPMessage;
import org.apache.http.entity.ContentType;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import com.sun.xml.messaging.saaj.SOAPExceptionImpl;
import com.sun.xml.messaging.saaj.soap.MessageImpl;
import com.sun.xml.messaging.saaj.soap.ver1_1.Message1_1Impl;
import com.sun.xml.messaging.saaj.soap.ver1_1.SOAPMessageFactory1_1Impl;
public class CustomSOAPMessageFactoryImpl extends SOAPMessageFactory1_1Impl{
private static final Logger logger = LogManager.getLogger(CustomSOAPMessageFactoryImpl.class);
#Override
public SOAPMessage createMessage(MimeHeaders headers, InputStream in) throws IOException, SOAPExceptionImpl {
if (headers == null) {
headers = new MimeHeaders();
}
//The OR condition is a work around for Client, if they are not sending text/xml
if (getContentType(headers) == null || ContentType.APPLICATION_XML.getMimeType().equals(getContentType(headers))) {
logger.info("Received Content-Type Header Value as {}, setting it as {}", getContentType(headers), SOAPConstants.SOAP_1_1_CONTENT_TYPE);
headers.setHeader("Content-Type", SOAPConstants.SOAP_1_1_CONTENT_TYPE);
}
MessageImpl msg = new Message1_1Impl(headers, in);
msg.setLazyAttachments(lazyAttachments);
return msg;
}
}

org.springframework.web.client.HttpClientErrorException: 405 null / WARNING: Request method 'POST' not supported

I am trying to test a POST api using RestTemplate as the client but I am continuously getting an exception.
I have tried a lot of different solutions but I continue to get this exception.
The details are as below:
By using the following client code:
#RequestMapping("/leaders")
public String showLeaders(HttpSession session, Model theModel) throws Exception {
final String uri = "http://localhost:8080/demo-find-my-hotel/api/get-access-token";
System.out.println(uri);
UserDetailsPojo newEmployee = new UserDetailsPojo(
session.getAttribute("api_key").toString(),
session.getAttribute("client_secret").toString());
RestTemplate restTemplate = new RestTemplate();
UserDetailsPojo result = restTemplate.postForObject(uri, newEmployee,
UserDetailsPojo.class);
System.out.println(result);
return "test";
}
and POJO:
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
#JsonIgnoreProperties(ignoreUnknown = true)
public class UserDetailsPojo {
private String client_id;
private String client_secret;
public UserDetailsPojo() {}
public UserDetailsPojo(String client_id, String client_secret) {
super();
this.client_id = client_id;
this.client_secret = client_secret;
}
public String getClient_id() {
return client_id;
}
public void setClient_id(String client_id) {
this.client_id = client_id;
}
public String getClient_secret() {
return client_secret;
}
public void setClient_secret(String client_secret) {
this.client_secret = client_secret;
}
}
I am trying to call this api:
#RequestMapping(value = "/get-access-token", method = RequestMethod.POST)
public String getAccessToken(#ModelAttribute UserDetailsPojo userDetails) throws Exception {
System.out.println(userDetails.getClient_id());
return "yooooooo";
}
But I always get this exception:
Oct 30, 2019 3:23:36 PM org.springframework.web.servlet.PageNotFound handleHttpRequestMethodNotSupported
WARNING: Request method 'POST' not supported
Oct 30, 2019 3:23:36 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [dispatcher] in context with path [/demo-find-my-hotel] threw exception [Request processing failed; nested exception is org.springframework.web.client.HttpClientErrorException: 405 null] with root cause
org.springframework.web.client.HttpClientErrorException: 405 null
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:94)
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:79)
at org.springframework.web.client.ResponseErrorHandler.handleError(ResponseErrorHandler.java:63)
at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:772)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:725)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:681)
at org.springframework.web.client.RestTemplate.postForObject(RestTemplate.java:432)
at com.findmyhotel.controller.DemoController.showLeaders(DemoController.java:84)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:871)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:777)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:870)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:320)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:200)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:100)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:215)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)

ModelAttribute
Annotation that binds a method parameter or method return value to a named model attribute, exposed to a web view. Supported for controller classes with #RequestMapping methods.
Can be used to expose command objects to a web view, using specific attribute names, through annotating corresponding parameters of an #RequestMapping method.
RequestBody
Annotation indicating a method parameter should be bound to the body of the web request. The body of the request is passed through an HttpMessageConverter to resolve the method argument depending on the content type of the request. Optionally, automatic validation can be applied by annotating the argument with #Valid.
#RequestMapping(value = "/get-access-token", method = RequestMethod.POST)
public String getAccessToken(#RequestBody UserDetailsPojo userDetails) throws Exception {
System.out.println(userDetails.getClient_id());
return "yooooooo";
}
Your API(getAccessToken) method use #RequestBody.
Check values in newEmployee.
Request content type default setting application/json in postForObject.
Search multiValueMap or defaultMessageConverter.

When you are using #ModelAttribute as controller param, then you need to send your data as application/x-www-form-urlencoded something like this:
MultiValueMap<String, Object> variables = new LinkedMultiValueMap<>();
variables.add("client_id", session.getAttribute("api_key").toString());
variables.add("client_secret", session.getAttribute("client_secret").toString());
HttpHeaders requestHeaders = new HttpHeaders();
requestHeaders.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<>(variables,
requestHeaders);
String uri = "http://localhost:8080/demo-find-my-hotel/api/get-access-token";
RestTemplate restTemplate = new RestTemplate();
ResponseEntity<String> response = restTemplate.exchange(url, HttpMethod.POST,
requestEntity, UserDetailsPojo.class);

How to serialize a java.security.Principal?

I have written this code:
#RestController
public class UserController {
private final static Logger LOGGER = LoggerFactory.getLogger(UserController.class);
#RequestMapping(path = "/", produces = "application/json")
public #ResponseBody Principal getUser(HttpServletRequest request) throws Exception {
try {
Principal principal = request.getUserPrincipal();
LOGGER.debug("User found" + principal.toString());
return principal;
}
catch (Exception e) {
LOGGER.debug("User not found : " + e.getMessage());
throw e;
}
}
}
But it throws:
java.lang.IllegalStateException: getOutputStream() has already been
called for this response
How do I serialize that object? What makes an object serializable for Spring Boot? During the execution, the actual object type is the org.apache.catalina.realm.GenericPrincipal implementation of Principal
As requested, here is the full stack trace:
#ERROR#org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/loggedinusertest].[dispatcherServlet]##anonymous#https-jsse-nio-8041-exec-5#na#ab54cfe76#loggedinusertest#web#ab54cfe76#na#na#na#na#Servlet.service()
for servlet [dispatcherServlet] threw exception
java.lang.IllegalStateException: getOutputStream() has already been
called for this response at
org.apache.catalina.connector.Response.getWriter(Response.java:624)
at
org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:211)
at
org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration$SpelView.render(ErrorMvcAutoConfiguration.java:218)
at
org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1257)
at
org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1037)
at
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:980)
at
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) at
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at
org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)
at
org.springframework.boot.web.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:112)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:728)
at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:470)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:395)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:316)
at
org.springframework.boot.web.support.ErrorPageFilter.handleErrorStatus(ErrorPageFilter.java:153)
at
org.springframework.boot.web.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:121)
at
org.springframework.boot.web.support.ErrorPageFilter.access$000(ErrorPageFilter.java:61)
at
org.springframework.boot.web.support.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:94)
at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at
org.springframework.boot.web.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:112)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at
com.sap.core.connectivity.jco.session.ext.RequestTracker.invoke(RequestTracker.java:55)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:610)
at
com.sap.cloud.runtime.impl.bridge.security.AbstractAuthenticator.invoke(AbstractAuthenticator.java:206)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
at
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
at
com.sap.core.tenant.valve.TenantValidationValve.invokeNextValve(TenantValidationValve.java:182)
at
com.sap.core.tenant.valve.TenantValidationValve.invoke(TenantValidationValve.java:97)
at
com.sap.js.statistics.tomcat.valve.RequestTracingValve.callNextValve(RequestTracingValve.java:113)
at
com.sap.js.statistics.tomcat.valve.RequestTracingValve.invoke(RequestTracingValve.java:59)
at
com.sap.core.js.monitoring.tomcat.valve.RequestTracingValve.invoke(RequestTracingValve.java:27)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800)
at
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:800)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1471)
at
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:836)

By exposing a Principal instance (such as an instance of GenericPrincipal from Apache Tomcat) in your web API, you may ended up leaking some sensitive details you don't intent to.
A better approach would be creating a DTO and then mapping only the principal details you want to expose to this DTO.
Despite the security breaches, let me just clarify what may be wrong with the serialization itself.
If you create an instance of GenericPrincipal and then attempt to serialize it to JSON using ObjectMapper directly, you'll see it won't succeed:
ObjectMapper mapper = new ObjectMapper();
Principal principal = new GenericPrincipal("john.doe", "secret", Arrays.asList("admin"));
String json = mapper.writeValueAsString(principal);
The exception is:
Exception in thread "main" com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Direct self-reference leading to cycle (through reference chain: org.apache.catalina.realm.GenericPrincipal["userPrincipal"])
If you check the GenericPrincipal source code, you'll see a userPrincipal field:
protected final Principal userPrincipal;
Well, you could attempt to use mix-in annotations, but it's probably not worth it. Just create a DTO and expose only what you need.

How to fix: java.io.NotSerializableException: org.apache.spark.api.java.JavaSparkContext for wordCountProgram

I tried writing a simple rest controller in springboot that accepts a file and a string and searches in that file how many time the string is found, basically a word search and count.
I have a master and runner running on my pc and the springboot application connects without any problems. I tried using without a 'dedicated' spark master and it worked ok but after i made it connect to my desired problem the problem started occurring.
I also tried using lambda expressions but that got me other problems so i tried to make it easier.
Spark config:
#Configuration
public class SparkConfig {
#Value("${spark.app.name}")
private String appname;
#Value("${spark.master}")
private String masterUri;
#Bean
public SparkConf conf(){
System.out.println(appname + " " + masterUri);
return new SparkConf()
.setAppName(appname)
.setMaster(masterUri);
}
#Bean
public JavaSparkContext sc(){
return new JavaSparkContext(conf());
}
Endpoint:
#RequestMapping(value = "/file-word-count",method = RequestMethod.POST)
public String fileWordCount(#RequestParam("file") MultipartFile file, #RequestParam String word) {
return wordCountService.countFileWords(file,word);
}
service
#Service
#Component
public class WordCountService implements Serializable {
#Autowired
JavaSparkContext sc;
public String countFileWords(MultipartFile file, String word) {
String result = null;
try {
JavaRDD<String> textFile = sc.textFile(convertMultiToFile(file).getPath());
JavaRDD<String> words = textFile.filter(new Function<String, Boolean>() {
#Override
public Boolean call(String s) throws Exception {
return s.contains(word);
}
});
result = String.valueOf(words.count());
}
catch(IOException e){
System.out.println(e.getMessage());
}
return result;
}
public File convertMultiToFile(MultipartFile mFile) throws IOException {
File file = new File("temp","tempTextFile");
FileUtils.writeByteArrayToFile(file,mFile.getBytes());
return file;
}
}
console output:
2019-06-25 22:11:08.462 ERROR 5960 --- [nio-9090-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.apache.spark.SparkException: Task not serializable] with root cause
java.io.NotSerializableException: org.apache.spark.api.java.JavaSparkContext
Serialization stack:
- object not serializable (class: org.apache.spark.api.java.JavaSparkContext, value: org.apache.spark.api.java.JavaSparkContext#47c997cb)
- field (class: com.licenta.service.WordCountService, name: sc, type: class org.apache.spark.api.java.JavaSparkContext)
- object (class com.licenta.service.WordCountService, com.licenta.service.WordCountService#4152741c)
- field (class: com.licenta.service.WordCountService$1, name: this$0, type: class com.licenta.service.WordCountService)
- object (class com.licenta.service.WordCountService$1, com.licenta.service.WordCountService$1#22ae6915)
- field (class: org.apache.spark.api.java.JavaRDD$$anonfun$filter$1, name: f$1, type: interface org.apache.spark.api.java.function.Function)
- object (class org.apache.spark.api.java.JavaRDD$$anonfun$filter$1, <function1>)
at org.apache.spark.serializer.SerializationDebugger$.improveException(SerializationDebugger.scala:40) ~[spark-core_2.11-2.4.3.jar:2.4.3]
at org.apache.spark.serializer.JavaSerializationStream.writeObject(JavaSerializer.scala:46) ~[spark-core_2.11-2.4.3.jar:2.4.3]
at org.apache.spark.serializer.JavaSerializerInstance.serialize(JavaSerializer.scala:100) ~[spark-core_2.11-2.4.3.jar:2.4.3]
at org.apache.spark.util.ClosureCleaner$.ensureSerializable(ClosureCleaner.scala:400) ~[spark-core_2.11-2.4.3.jar:2.4.3]
at org.apache.spark.util.ClosureCleaner$.org$apache$spark$util$ClosureCleaner$$clean(ClosureCleaner.scala:393) ~[spark-core_2.11-2.4.3.jar:2.4.3]
at org.apache.spark.util.ClosureCleaner$.clean(ClosureCleaner.scala:162) ~[spark-core_2.11-2.4.3.jar:2.4.3]
at org.apache.spark.SparkContext.clean(SparkContext.scala:2326) ~[spark-core_2.11-2.4.3.jar:2.4.3]
at org.apache.spark.rdd.RDD$$anonfun$filter$1.apply(RDD.scala:388) ~[spark-core_2.11-2.4.3.jar:2.4.3]
at org.apache.spark.rdd.RDD$$anonfun$filter$1.apply(RDD.scala:387) ~[spark-core_2.11-2.4.3.jar:2.4.3]
at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151) ~[spark-core_2.11-2.4.3.jar:2.4.3]
at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112) ~[spark-core_2.11-2.4.3.jar:2.4.3]
at org.apache.spark.rdd.RDD.withScope(RDD.scala:363) ~[spark-core_2.11-2.4.3.jar:2.4.3]
at org.apache.spark.rdd.RDD.filter(RDD.scala:387) ~[spark-core_2.11-2.4.3.jar:2.4.3]
at org.apache.spark.api.java.JavaRDD.filter(JavaRDD.scala:78) ~[spark-core_2.11-2.4.3.jar:2.4.3]
at com.licenta.service.WordCountService.countFileWords(WordCountService.java:35) ~[classes/:na]
at com.licenta.controller.CountController.fileWordCount(CountController.java:29) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_161]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_161]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_161]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_161]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.17.jar:9.0.17]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_161]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_161]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.17.jar:9.0.17]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_161]
2019-06-25 22:41:00.704 INFO 5960 --- [er-event-loop-8] o.apache.spark.storage.BlockManagerInfo : Removed broadcast_0_piece0 on DESKTOP-TF9C4EG:55462 in memory (size: 20.4 KB, free: 898.5 MB)
I expect to get a string that has the number of the word occurrences.
Hope that i was clear in explaining, if not do tell and ill try to answer as best i can.

The problem is the new Function<String, Boolean>(), it is an anonymous class and has a reference to WordCountService and transitive to JavaSparkContext. To avoid that you can make it a static nested class.
static class WordCounter implements Function<String, Boolean>, Serializable {
private final String word;
public WordCounter(String word){
this.word = word;
}
#Override
public Boolean call(String s) throws Exception {
return s.contains(word);
}
}
and use it with
JavaRDD<String> words = textFile.filter(new WordCounter(word));

Every Spark node should load classes which are required for execution of your logic. In your case it is class with countFileWords method
To fix your problem you have to do the following steps:
Implement countFileWords function in separate module(you need jar file with class where countFileWords is implemented)
Add dependency to this module to your web project where WordCountService is implemented
Set path to Jar file to JavaSparkContext using public void addJar(String path)
public void addJar(String path) Adds a JAR dependency for all tasks to
be executed on this SparkContext in the future. The path passed can be
either a local file, a file in HDFS (or other Hadoop-supported
filesystems), or an HTTP, HTTPS or FTP URI.

Spring boot MailConnectException: Couldn't connect to host, port: localhost, 25; timeout -1;

I know massive number of questions is asked in the Context of this MailConnectException, but my issue is bit different
I am facing strange behavior of Spring boot App, with the code provided bellow I have two Scenarios let me explain :
STMP Settings
spring.mail.default-encoding=UTF-8
spring.mail.host=smtp.mailtrap.io
spring.mail.username=2fcc984a833f26
spring.mail.password=notMypassword
spring.mail.port=465
spring.mail.protocol=smtp
spring.mail.test-connection=false
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true
Email POJO/Model class
#Data
#ToString(includeFieldNames=true)
public class Email {
private String name;
private String from;
private String to;
private String subject;
private String content;
private Map<String , Object > model;
public Email() {
}
public Email(String name, String from, String to, String subject, String content) {
this.name = name;
this.from = from;
this.to = to;
this.subject = subject;
this.content = content;
}
}
EmailService class
#Service
public class EmailService {
#Autowired
private JavaMailSender emailSender;
#Qualifier("templateEngine")
#Autowired
private SpringTemplateEngine templateEngine;
private static Logger log = LoggerFactory.getLogger(EmailService.class);
public void sendSimpleMessage(Email mail) throws MessagingException, IOException {
MimeMessage message = emailSender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(message,
MimeMessageHelper.MULTIPART_MODE_MIXED_RELATED,
StandardCharsets.UTF_8.name());
//helper.addAttachment("logo.png", new ClassPathResource("memorynotfound-logo.png"));
Context context = new Context();
context.setVariables(mail.getModel());
String html = templateEngine.process("contact/email-template", context);
log.info("Subject : " + mail.getSubject());
//helper.setTo("");
mail.setTo("exmail#mail.com");
helper.setText(html, true);
helper.setSubject(mail.getSubject());
helper.setFrom(mail.getFrom());
emailSender.send(message);
}
}
First Scenario
If I send email using following code :
#SpringBootApplication
public class EmailDemoApplication implements ApplicationRunner {
private static Logger log = LoggerFactory.getLogger(EmailDemoApplication.class);
#Autowired
private EmailService emailService;
public static void main(String[] args) {
SpringApplication.run(EmailDemoApplication.class, args);
}
#Override
public void run(ApplicationArguments applicationArguments) throws Exception {
log.info("Sending Email with Thymeleaf HTML Template Example");
Email mail = new Email();
mail.setFrom("no-reply#exmail.com");
mail.setTo("info#exmail.com");
mail.setSubject("Sending Email with Thymeleaf HTML Template Example");
Map<String, Object> model = new HashMap<String, Object>();
model.put("name", "Foo Bar");
model.put("location", "Mars");
model.put("signature", "https://exmail.com");
mail.setModel(model);
emailService.sendSimpleMessage(mail);
}
}
the email is sent without any issue, but
Second Scenario
If I send email using form through controller as :
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Email Demo</title>
</head>
<body>
<form th:action="#{/}" th:object="${mail}" th:method="post">
<input type="text" th:name="name" placeholder="Your name..." required><br>
<input type="email" th:name="from" placeholder="Email..." required><br>
<input type="text" th:name="subject" placeholder="Subject..." required><br>
<textarea rows="20" th:name="content"></textarea><br>
<button type="submit">Send</button>
</form>
</body>
</html>
and Controller is
#Controller
public class MailController {
private static Logger log = LoggerFactory.getLogger(MailController.class);
#Autowired
private EmailService emailService;
#GetMapping(value = "/")
public String getContactPage(Model model){
model.addAttribute("mail", new Email());
return "home";
}
#PostMapping(value = "/")
public String postContactPage(#ModelAttribute(value = "mail") Email mail) throws Exception{
log.info("Sending Email with Thymeleaf HTML Template Example");
mail.setTo("info#exmail.com");
Map<String, Object> model = new HashMap<>();
model.put("name", mail.getName());
model.put("location", "Mars");
model.put("signature", "https://exmail.com");
mail.setModel(model);
emailService.sendSimpleMessage(mail);
return "redirect:/";
}
}
this code gives me org.springframework.mail.MailSendException: Mail server connection failed and StackTrace is :
2019-01-04 09:55:31.588 ERROR 924 --- [nio-8080-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.mail.MailSendException: Mail server connection failed; nested exception is com.sun.mail.util.MailConnectException: Couldn't connect to host, port: localhost, 25; timeout -1;
nested exception is:
java.net.ConnectException: Connection refused: connect. Failed messages: com.sun.mail.util.MailConnectException: Couldn't connect to host, port: localhost, 25; timeout -1;
nested exception is:
java.net.ConnectException: Connection refused: connect; message exceptions (1) are:
Failed message 1: com.sun.mail.util.MailConnectException: Couldn't connect to host, port: localhost, 25; timeout -1;
nested exception is:
java.net.ConnectException: Connection refused: connect] with root cause
java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method) ~[na:1.8.0_131]
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79) ~[na:1.8.0_131]
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_131]
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_131]
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_131]
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) ~[na:1.8.0_131]
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_131]
at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_131]
at java.net.Socket.connect(Socket.java:538) ~[na:1.8.0_131]
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:359) ~[javax.mail-1.6.2.jar:1.6.2]
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:238) ~[javax.mail-1.6.2.jar:1.6.2]
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2175) ~[javax.mail-1.6.2.jar:1.6.2]
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:740) ~[javax.mail-1.6.2.jar:1.6.2]
at javax.mail.Service.connect(Service.java:366) ~[javax.mail-1.6.2.jar:1.6.2]
at org.springframework.mail.javamail.JavaMailSenderImpl.connectTransport(JavaMailSenderImpl.java:515) ~[spring-context-support-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:435) ~[spring-context-support-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:359) ~[spring-context-support-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:354) ~[spring-context-support-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at com.ex.ample.contact.service.EmailService.sendSimpleMessage(EmailService.java:51) ~[classes/:na]
at com.ex.ample.controller.MailController.postContactPage(MailController.java:48) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_131]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_131]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_131]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_131]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.13.jar:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:791) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.13.jar:9.0.13]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_131]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_131]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.13.jar:9.0.13]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]
Could not figure out where is the bug which makes this to happen?
UPDATE
When I remove
#Bean
public JavaMailSender emailSender(){
return new JavaMailSenderImpl();
}
as Suggested by #Veeram in his answer I get this NPE
org.springframework.mail.MailSendException: Failed messages: java.lang.NullPointerException
at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:488) ~[spring-context-support-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:359) ~[spring-context-support-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:354) ~[spring-context-support-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at com.ex.ample.contact.service.EmailService.sendSimpleMessage(EmailService.java:55) ~[classes/:na]
at com.ex.ample.controller.MailController.postContactPage(MailController.java:48) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_131]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_131]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_131]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_131]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ~[spring-webmvc-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.13.jar:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) ~[tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:791) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417) [tomcat-embed-core-9.0.13.jar:9.0.13]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.13.jar:9.0.13]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_131]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_131]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.13.jar:9.0.13]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]
You can find a clone of this App at at this link here

You are overwriting the spring java mail sender bean with #Bean annotation.
Remove the following #Bean annotation from DemoEmailConnectionApplication. It will go back to auto configuration and will use the application.properties you've defined.
#Bean
public JavaMailSender emailSender(){
return new JavaMailSenderImpl();
}
Your DemoEmailConnectionApplication class should look a lot simpler, like this:
import ...
#SpringBootApplication
public class DemoEmailConnectionApplication {
public static void main(String[] args) {
SpringApplication.run(DemoEmailConnectionApplication.class, args);
}
}
You'll run into another exception later as the message is not properly set in the demo application but the connection issue will be solved.

In order to send the email, there should be someone who is listening to port 25, host localhost. If you want to mock the email server, you can use FakeSMTP. Alternatively, you can use real external email providers such as mailchimp, sendgrid but their configuration would differ based on the vendor itself.
Edit:
I see you have configured SMTP properties correctly. However, given the fact that spring is still trying to connect to localhost:25 to send email, it's implying your properties are not getting loaded correctly and hence spring is falling back to default configuration.

#ConfigurationProperties(prefix = "spring.mail")
Try to add this annotation since Spring can't find your configuration file at your Configuration part.You should state it to make sure your properties will be loaded.

you don't load your application.yml, please add
#RunWith(SpringRunner.class)
#SpringBootTest(classes = mainApplication.class)
in front of the class you want to add #test