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Spring-webflux application startup failures

The application is failing during the startup with this error:
The bean 'requestDataValueProcessor', defined in class path resource [org/springframework/security/config/annotation/web/configuration/WebMvcSecurityConfiguration.class], could not be registered. A bean with that name has already been defined in class path resource [org/springframework/security/config/annotation/web/reactive/WebFluxSecurityConfiguration.class] and overriding is disabled.
All team members have the same problem and it seems that even if we're checking out an old git tag, the same problem persist. We've checked all the build files and dependencies, and nothing seemed to be changed in the last period of time. What's even more interesting is that the Bamboo seemed to run the build and the IT's pack with success with a day before, but today's morning it seem that the same issue is replicated there.
Not sure exactly why is complaining about WebMvcSecurityConfiguration, since we're using only reactive security in our project. So at this point we don't have any spring-mvc dependencies..
Does anyone have any clue ? Thx

So after we've enabled debug level logs on spring and force spring app to use only the reactive configurations like this:
spring:
main:
web-application-type: reactive
it seemed that the springfox dependencies were failing with:
java.lang.NoSuchMethodError: org.springframework.util.MultiValueMap.addIfAbsent(Ljava/lang/Object;Ljava/lang/Object;)V
at springfox.documentation.spring.web.scanners.ModelSpecificationRegistryBuilder.lambda$add$0(ModelSpecificationRegistryBuilder.java:37)
at java.base/java.util.Optional.ifPresent(Optional.java:183)
at springfox.documentation.spring.web.scanners.ModelSpecificationRegistryBuilder.add(ModelSpecificationRegistryBuilder.java:34)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
at
So that error ^^^ point us towards sprinfox dependencies which were:
compile ("io.springfox:springfox-swagger-ui:3.0.0-SNAPSHOT")
compile ("io.springfox:springfox-swagger2:3.0.0-SNAPSHOT")
compile ("io.springfox:springfox-spring-webflux:3.0.0-SNAPSHOT")
After furthermore investigation, it seemed that some of those contains the spring-mvc dependency and that interfere with the spring-webflux one, and the application got confused which beans to inject.
We've downgrade those dependencies to 2.10.0, and everything seems to work now. My guess is that they've made some releases with that snapshot version and that include spring mvc, but until now it was absent. Lesson learned, never use some external libraries snapshots versions, otherwise you could end up in a very bad situation.

X.X.X-SNAPSHOT Dependencies are not the stable ones.
we were using <springfox.version>3.0.0-SNAPSHOT</springfox.version> which suddenly stopped working.
So below solution worked for us.
<springfox.version>2.10.5</springfox.version>
Cheers!!

Error occurred during initialization of boot layer spring framework

When I am running my code the Console shows the following error
"Error occurred during initialization of boot layer
java.lang.module.FindException: Unable to derive module descriptor for
C:\Users\Ankit
Singh\Downloads\spring-framework-5.1.9.RELEASE\libs\spring-context-indexer-5.1.9.RELEASE-sources.jar
Caused by: java.lang.module.InvalidModuleDescriptorException: Provider
class
org.springframework.context.index.processor.CandidateComponentsIndexer
not in module
Default Package delete.
Reinstalled Spring library
Two different way to call beans
Can someone suggested whats wrong in my system??

You might use a default package, right? I have had the same error as you...
Listen, dude, you can try to click: your project name-properties-java build path, move your external jar(s) from module-path to classpath. Then, you can run the code again.

NoSuchMethodError: org.hibernate.SessionFactory.openSession()

I'm having hibernate3.jar and hibernate-core-4.2.0.CR1.jar in my classpath and I'm using Spring 3.1.3 version. Code got compiles sucessfully but while runtime I'm getting following error
2014-10-28 10:51:25,174 DEBUG [RMI TCP Connection(2)-10.126.30.203] -
Target method failed for RemoteInvocation: method name
'getPriceByKeys'; parameter types [java.util.List, java.util.Date]
java.lang.NoSuchMethodError:
org.hibernate.SessionFactory.openSession()Lorg/hibernate/Session;
I google it but not find any solution. Please note : My project needs hibernate3.jar but at the same time my project dependent on some other 3rd party jar which inturn using hibernet4.2.0 jar.
Any help Pls ??

You need to remove multiple hibernate JAR files from your classpath. Without doing this, your application may not work as you expect; which means you need to migrate the hibernate version of your application from 3 to 4.1.
Although Spring 3.1 uses Hibernate 3 JAR files, you can still migrate to Hibernate 4. Check out Spring blog gives a small tutorial to do so.
Migrating to Spring 3.1 and Hibernate 4.1
As part of the Core-Spring course, we have a lab application that we
use to show how to integrate Spring and JPA/Hibernate together. We
have just upgraded it to Spring 3.1 / Hibernate 4.1, and thought we
should share a few tips.

Just an update. The cause of problem is , I'm having two spring-context xml files in project (one of my project and one related to another module that I'm integrating). I'm loading context xmls from two different classes. So one of the DAO class loaded by one of spring-context xml not getting the hibernate Session.
Later on using import tag, I included 2nd spring application context file in 1st application context file and then loaded a Single application context file from the class. It solved the error.
Thanks,

Failed to import bean definitions from URL location [classpath:applicationContext-core.xml]

I'm working on a java project with spring on eclipse using Maven, and running on a Tomcat server v6.0. Everything was working fine since yesterday morning.
Here his my problem : I'm building my project, I got a build success. Then I start my Tomcat server and got this error :
org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Failed to import bean definitions from URL location [classpath:applicationContext- core.xml]
Offending resource: ServletContext resource [/WEB-INF/applicationContext.xml]; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from class path resource [applicationContext-core.xml]; nested exception is java.io.FileNotFoundException: class path resource [applicationContext-core.xml] cannot be opened because it does not exist
I found out similar problem on some website but none of them give me a solution that worked for me.
It seems that eclipse isn't able to find applicationContext-core.xml when I'm doing this :
<import resource="classpath:applicationContext-core.xml" />
However, I do have the needed jar file nad-core-0.0.1-SNAPSHOT.jar in WEB-INF/lib containing applicationContext-core.xml.
I even tried to add it manually to the classpath but I was still having the same problem.
I keep on looking for a solution, when suddendly it work again once after restarting Eclipse and building while Eclipse was still updating indexes and my project was having this strange status Hg status pending instead of default. Surprised by this result I decide to build again my project after restarting Eclipse and I got the error again and I enable to make it work again. It's quite annoying...
This looks to be a really random problem.
Thanks a lot for your help :)

As you've not specified you web application structure. I assume you've a simple web application at hand with the following structures
webapp
WEB-INF/classes/applicationContext.xml
WEB-INF/lib/nad-core-0.0.1-SNAPSHOT.jar/applicationContext-core.xml
Application context.xml refers to the applicationContext-core.xml file using the import tag. I did encounter a similar situation in my web application, here're the check lists that you should go through and may be one of them can apply to your situation.
Check the generated snapshot jar file for the applicationContext-core.xml file and make sure it is in the root directory of the jar. As silly as it sounds, this was the root cause of the issue I faced in my deployment.
Make sure your Maven Pom.xml file is configured to include this XML file from the resources folder. You can use the resource tags in the build phase of Maven to package them within the jar file itself.
You can try removing the import tag from application context.xml file and instead load both of them from Spring's webapplication context itself.
Add a context loader listener class from spring org.springframework.web.context.ContextLoaderListener
Add context-param contextConfigLocation with value classpath:applicationContext-core.xml,classpath:applicationContext.xml. Spring has the ability to dynamically sort out the dependencies before initiating the bean factory.
Hope this check list helps.

I get pretty much the same config, six years later, I got the same error.
I also restart Eclipse, and it solved the issue.

How to overcome the error NoSuchFieldError: PATCH

I have crated a project using spring mvc which includes hibernate and jpa. When i try to run that program got an error. Please help. Thank you.
Exception :
javax.servlet.ServletException: Servlet execution threw an exception
Root Cause :
java.lang.NoSuchFieldError: PATCH
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:808)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

Did you mark your spring dependency as 'provided' on maven, and then run your code on the app server against a different version of spring? If so this is probably the cause
If your app server provides spring library, ensure the declared maven dependency version matches

Even I faced the same problem for first trial with of Spring MVC what I figured out that a Class name MimeType was missing (i.e org.springframework.util.MimeType) you can solve this by adding spring-core-4.0.0.RELEASE.jar file.
I think this would solve your problem cause it worked with me.