Weblogic config error - Message body writer for Java class, and Java type class, and MIME media type application/json was not found

Question

I'm running into an issue with my application running on a Weblogic server. The weird part is that the application is fine on 3 other JVMs (6 managed servers). There is one JVM with 2 managed servers that are both giving this error:

####<Oct 31, 2014 3:58:43 PM EDT> <Notice> <StdErr> <physaddress> <managedServer> <[ACTIVE] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1414
785523072> <BEA-000000> <Oct 31, 2014 3:58:43 PM com.sun.jersey.spi.container.ContainerResponse write
SEVERE: The registered message body writers compatible with the MIME media type are:
*/* ->
  com.sun.jersey.core.impl.provider.entity.FormProvider
  com.sun.jersey.core.impl.provider.entity.MimeMultipartProvider
  com.sun.jersey.core.impl.provider.entity.StringProvider
  com.sun.jersey.core.impl.provider.entity.ByteArrayProvider
  com.sun.jersey.core.impl.provider.entity.FileProvider
  com.sun.jersey.core.impl.provider.entity.InputStreamProvider
  com.sun.jersey.core.impl.provider.entity.DataSourceProvider
  com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$General
  com.sun.jersey.core.impl.provider.entity.ReaderProvider
  com.sun.jersey.core.impl.provider.entity.DocumentProvider
  com.sun.jersey.core.impl.provider.entity.StreamingOutputProvider
  com.sun.jersey.core.impl.provider.entity.SourceProvider$SourceWriter
  com.sun.jersey.server.impl.template.ViewableMessageBodyWriter
  com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$General
  com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$General>
####<Oct 31, 2014 3:58:43 PM EDT> <Notice> <StdErr> <physaddress> <managedServer> <[ACTIVE] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1414785523072> <BEA-000000> <Oct 31, 2014 3:58:43 PM com.sun.jersey.spi.container.ContainerResponse logException
SEVERE: Mapped exception to response: 500 (Internal Server Error)
javax.ws.rs.WebApplicationException: com.sun.jersey.api.MessageException: A message body writer for Java class xVO, and Java type class xVO, and MIME media type application/json was not found
        at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:285)
        at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1479)
        at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1391)
        at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1381)
        at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
        at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538)
        at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:184)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3741)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3705)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
        at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2282)
        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2181)
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1491)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)
Caused by: com.sun.jersey.api.MessageException: A message body writer for Java class xVO, and Java type class xVO, and MIME media type application/json was not found
        ... 21 more>

I'm not sure what other info could be helpful. The server was working fine. The thought is that there was some sort of config change that threw things off, but I'm unsure what it was. Again, the application is running fine on 3 other instances of weblogic. This particular instance is not working and we are unsure why.

Any assistance would be appreciated. I would be happy to supply more info upon request. Thanks!

Answer 1

Weblogic on very rare instances retains the old deployed file(of course it also depends on how the file was deployed) in the staging directory. Generally if there are inssues related to one weblogic server and not the other, stop the managed servers, deleting the tmp, stage or just moving it to a new directory and restarting the managed server makes the managed server pull the latest file and unzips it(stage keeps the war/ear file and tmp has the unzipped version). That most often fixes the issue.