My weblogic instance doesnt response and why this error occured? (BEA/Weblogic forum at Coderanch)

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Hey guys I analyzed our log files mainly *.log and *.out log files.

I get this error

and I found this error

<Error> <HTTP>  <[ACTIVE] ExecuteThread: '24' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1452162190847> <BEA-101020> <[ServletContext@692691170[app:TCRA module:TCRA.war path:null spec-version:3.0]] Servlet failed with an Exception
weblogic.servlet.internal.ServletNestedRuntimeException: Cannot parse POST parameters of request: '/TC/BuildNPlay/cubeGridController'
        at weblogic.servlet.internal.ServletRequestImpl$RequestParameters.mergePostParams(ServletRequestImpl.java:2426)
        at weblogic.servlet.internal.ServletRequestImpl$RequestParameters.parseQueryParams(ServletRequestImpl.java:2243)
        at weblogic.servlet.internal.ServletRequestImpl$RequestParameters.getQueryParams(ServletRequestImpl.java:2129)
        at weblogic.servlet.internal.ServletRequestImpl$RequestParameters.getParameterNames(ServletRequestImpl.java:2164)
        at weblogic.servlet.internal.ServletRequestImpl$RequestParameters.access$900(ServletRequestImpl.java:2014)
        at weblogic.servlet.internal.ServletRequestImpl.getParameterNames(ServletRequestImpl.java:891)
        at weblogic.servlet.internal.ServletRequestImpl.getParameterMap(ServletRequestImpl.java:946)
        at javax.servlet.ServletRequestWrapper.getParameterMap(ServletRequestWrapper.java:189)
        at com.eqtechnologic.eqube.eQSecurityFilter.a(SourceFile:121)
        at com.eqtechnologic.eqube.eQSecurityFilter.doFilter(SourceFile:60)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:79)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3436)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3402)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
        at weblogic.servlet.provider.WlsSubjectHandle.run(WlsSubjectHandle.java:57)
        at weblogic.servlet.internal.WebAppServletContext.doSecuredExecute(WebAppServletContext.java:2285)
        at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2201)
        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2179)
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1572)
        at weblogic.servlet.provider.ContainerSupportProviderImpl$WlsRequestExecutor.run(ContainerSupportProviderImpl.java:255)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:311)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:263)
Caused By: java.net.ProtocolException: EOF after reading only: '0' of: '226' promised bytes, out of which at least: '0' were already buffered
        at weblogic.servlet.internal.PostInputStream.complain(PostInputStream.java:84)
        at weblogic.servlet.internal.PostInputStream.read(PostInputStream.java:189)
        at weblogic.servlet.internal.ServletInputStreamImpl.read(ServletInputStreamImpl.java:251)
        at weblogic.servlet.internal.ServletRequestImpl$RequestParameters.mergePostParams(ServletRequestImpl.java:2400)
        at weblogic.servlet.internal.ServletRequestImpl$RequestParameters.parseQueryParams(ServletRequestImpl.java:2243)
        at weblogic.servlet.internal.ServletRequestImpl$RequestParameters.getQueryParams(ServletRequestImpl.java:2129)
        at weblogic.servlet.internal.ServletRequestImpl$RequestParameters.getParameterNames(ServletRequestImpl.java:2164)
        at weblogic.servlet.internal.ServletRequestImpl$RequestParameters.access$900(ServletRequestImpl.java:2014)
        at weblogic.servlet.internal.ServletRequestImpl.getParameterNames(ServletRequestImpl.java:891)
        at weblogic.servlet.internal.ServletRequestImpl.getParameterMap(ServletRequestImpl.java:946)
        at javax.servlet.ServletRequestWrapper.getParameterMap(ServletRequestWrapper.java:189)
        at com.eqtechnologic.eqube.eQSecurityFilter.a(SourceFile:121)
        at com.eqtechnologic.eqube.eQSecurityFilter.doFilter(SourceFile:60)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:79)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3436)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3402)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)

Are these two errors even related? Are either of them related to the fact that your weblogic instance is unresponsive?
Was the weblogic instance ever responsive? If so, what have you changed since then? If not, exactly what are you attempting to do?
Since we don't have access to the same information you have, you need to give us enough details that we can diagnose what is going on. see this FAQ for some hints on what we need to know.

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