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Why tomcat not serving for request after moving some files into it on running state?

I have five application which are running on tomcat-8.5.4. I moved any of the files(like .wav,.txt,.jsp and etc) under any one of the application. The tomcat getting stuck after few mins or hour.I don't know exact time when this issue will happen. I did not get any solution for this. so please help me to resolve the issue.
Note : The below issue occurred frequently once it started.
catlina error log line :
15-Apr-2020 07:44:18.784 SEVERE [http-nio-8080-exec-10] org.apache.coyote.http11.Http11Processor.service Error processing request
java.lang.NullPointerException
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:389)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:1110)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:785)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1425)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
15-Apr-2020 07:44:18.784 SEVERE [http-nio-8080-exec-10] org.apache.coyote.http11.Http11Processor.endRequest Error finishing response
java.lang.NullPointerException
at org.apache.coyote.http11.Http11OutputBuffer.flushBuffer(Http11OutputBuffer.java:533)
at org.apache.coyote.http11.Http11OutputBuffer.endRequest(Http11OutputBuffer.java:318)
at org.apache.coyote.http11.Http11Processor.endRequest(Http11Processor.java:1787)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:1149)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:785)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1425)
at org.apache.tomcat.util.net.Socket
ProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)

integrating apache tomcat and solr

I am trying to integrate apache tomcat (version 7)and solr (version 4) and i am getting this error :
HTTP Status 500 - {msg=SolrCore 'collection1' is not available due to init failure:
The filename, directory name, or volume label syntax is incorrect,
trace=org.apache.solr.common.SolrException: SolrCore 'collection1' is not available due to init failure: The filename, directory name, or volume label syntax is incorrect at
org.apache.solr.core.CoreContainer.getCore(CoreContainer.java:1212) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:248) at
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:155) at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218) at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169) at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956) at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442) at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1082) at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:623) at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316) at
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at
java.lang.Thread.run(Unknown Source) Caused by:
org.apache.solr.common.SolrException: The filename, directory name, or volume label syntax is incorrect at
org.apache.solr.core.SolrCore.<init>(SolrCore.java:821) at
org.apache.solr.core.SolrCore.<init>(SolrCore.java:618) at
org.apache.solr.core.CoreContainer.createFromLocal(CoreContainer.java:949) at
org.apache.solr.core.CoreContainer.create(CoreContainer.java:984) at
org.apache.solr.core.CoreContainer$2.call(CoreContainer.java:597) at
org.apache.solr.core.CoreContainer$2.call(CoreContainer.java:592) at
java.util.concurrent.FutureTask.run(Unknown Source) at
java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) at
java.util.concurrent.FutureTask.run(Unknown Source) at
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor
$Worker.run(Unknown Source) ... 1 more
Caused by: java.io.IOException: The filename, directory name, or volume label syntax is incorrect at
java.io.WinNTFileSystem.canonicalize0(Native Method) at java.io.Win32FileSystem.canonicalize(Unknown Source)
at java.io.File.getCanonicalPath(Unknown Source) at
org.apache.solr.core.StandardDirectoryFactory.normalize(StandardDirectoryFactory.java:47)
at org.apache.solr.core.SolrCore.initIndex(SolrCore.java:462) at
org.apache.solr.core.SolrCore.<init>(SolrCore.java:745) ... 11 more ,code=500}
please help me fix it!

Go to Solrconfig.xml and there will be a tag called as data directory , so just try to hard code the required path , if it works , then you can conclude that it is the root cause of the issue .

You can add the following java environment variable in tomcat startup configuration (in JAVA_OPTS for example).
-Dsolr.solr.home=<your solr.xml path>

JDBC - phpMyAdmin MySQL Can't login to database?

I'm hosting a web application through OpenShift. I added a MySQL database and created it with phpMyAdmin. Now, I think my server name is the name it shows on the phpMyAdmin page (127.01.201.302 for example). Now, I created a user 'localhostOnly' with the same password, I set the host to 'localhost' and priviliges to the insert, select update and delete.
But when i try to connect to it with the:
jdbc:mysql://127.01.201.302:3306/DB_NAME and using those login credentials, it gives this error:
java.sql.SQLException: Access denied for user 'localhostOnly'#'localhost' (using password: YES)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:998)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3835)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3771)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:870)
at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1659)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1206)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2239)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2270)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2069)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:794)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:389)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:325)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at database.OpeningsTijdenDAO.selectTijden(OpeningsTijdenDAO.java:15)
at database.OTService.getTijden(OTService.java:13)
at servlets.GetTijdenServlet.doPost(GetTijdenServlet.java:17)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
NOTE: I am absolutely sure the login credentials are correct. I do not have XAMMP or something installed.

at java.lang.Thread.run(Unknown Source)
By having a look at the last line of the entire error-trace. I can assume that your program failed to locate your server by given URL. I think you might be missing port number for your MySQL server. If you haven't changed your port number, then it's most likely 3307 by default. Change your Database Source URL from
jdbc:mysql://127.01.201.302/DB_NAME
to
jdbc:mysql://127.01.201.302:3307/DB_NAME

ClassNotFoundException: javax.ws.rs.client.ClientBuilder

I´m trying to consume a Jersey Rest Service from a Web Application (Dynamic Web App in eclispe) as follows:
Client client = ClientBuilder.newBuilder().build(); // Here is the error
WebTarget target = client.target("url/rest").path("List");
String result = target.request(MediaType.TEXT_PLAIN).get(String.class);
When debugging in the line ClientBuilder.newBuilder() the system throws the ClassNotFoundException: javax.ws.rs.client.ClientBuilder error, but the same code, in a java project works perfect.
Full trace:
javax.servlet.ServletException: Error instanciando clase de servlet test
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:655)
org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Unknown Source)
causa raíz
java.lang.NoClassDefFoundError: javax/ws/rs/client/ClientBuilder
test.<init>(test.java:27)
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
java.lang.reflect.Constructor.newInstance(Unknown Source)
java.lang.Class.newInstance(Unknown Source)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:655)
org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Unknown Source)
causa raíz
java.lang.ClassNotFoundException: javax.ws.rs.client.ClientBuilder
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1324)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1177)
test.<init>(test.java:27)
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
java.lang.reflect.Constructor.newInstance(Unknown Source)
java.lang.Class.newInstance(Unknown Source)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:655)
org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Unknown Source)

So here it comes ;)
First for the understanding:
javax.ws.rs.client is the standard package for RESTFul client implementations. Developers should programm against this interface.
At runtime you need an implementation of this interface in your classpath. Thats where projects like resteasy or jersey comes in.
Second:
In eclipse the buildpath and classpath settings only efect the environment in eclipse. When you put something in there manualy, it exist only in eclipse.
Third:
When you developing a webapplication depending on the Java EE webprofile you have automaticly access to all bundled packages of your application server like tomcat or jboss.
If your application uses more packages you have to distribute them together with your application. To do this you can place your third party jars under "WEB-INF/libs" in your project. When it is deployed to your application server, jars inside this folder are automaticly placed in your classpath of your app.
Fourth (about your solution):
Putting third party libs in the application server lib or endorsed directy make them accessable to all applications deployed on this application server and adds more complexity into your app server setup and maintenance.

Could not initialize class com.mysql.jdbc.StringUtils

I am developing a web application using Apache Tomcat 7.0 and MySQL database, and of late I am getting a strange exception in ALL MY WEB PAGES....
When I start tomcat and invoke any servlet, an exception stack trace appears first, which is as follows-
Aug 02, 2013 1:19:08 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [GenerateMiniStatement] in context with path [/IndianNationalBank] threw exception [null] with root cause
java.security.AccessControlException: access denied ("java.util.PropertyPermission" "file.encoding" "read")
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPropertyAccess(Unknown Source)
at java.lang.System.getProperty(Unknown Source)
at com.mysql.jdbc.StringUtils.<clinit>(StringUtils.java:70)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:327)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at in.inb.MiniStatement.GenerateMiniStatement.doPost(GenerateMiniStatement.java:64)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:277)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:274)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Unknown Source)
at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:309)
at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:169)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:299)
at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:57)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:189)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
After the first execution, when I try to invoke any servlet the second time, a different exception stack trace appears, which is as follows-
Aug 02, 2013 10:54:49 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [in.inb.Login.LoginServlet] in context with path [/SomeCompany] threw exception [Could not initialize class com.mysql.jdbc.StringUtils] with root cause
java.lang.NoClassDefFoundError: Could not initialize class com.mysql.jdbc.StringUtils
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:327)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at in.inb.Login.LoginServlet.doPost(LoginServlet.java:44)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at sun.reflect.GeneratedMethodAccessor26.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:277)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:274)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Unknown Source)
at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:309)
at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:169)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:299)
at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:57)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:189)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
My guess is that the StringUtils class is not getting access to the file.encoding system property, and becuase of that JVM is not able to properly load the class.
Is my guess right??
I have tried a lot on my own, but unable to get to an answer. I just cannot figure out where the problem lies. Please help me..
Thankyou very much in advance.

Check that the MySQL connector JAR is in the webapp's WEB-INF/lib folder and it actually contains the class (com.mysql.jdbc.StringUtils) that the exception says it cannot load.