https://bz.apache.org/bugzilla/show_bug.cgi?id=60254

Jens Borgland <jens.borgl...@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED

--- Comment #2 from Jens Borgland <jens.borgl...@gmail.com> ---
Thank you for your swift reply Mark! It makes sense I guess so I'm closing
this.

However, looking more at my logs I found that several things suggested that
processing of at least parts of the request was made on a different thread (and
if Tomcat finishes the processing of the request on that thread that would
indeed mean that we have the situation you describe once control is returned to
the original request thread) - so Spring MVC, which have support for
asynchronous handling (although we don't use it) seemed like a likely culprit
(we've recently updated Spring as well). But then I found the stack trace
below, where my entire filter chain (which is pretty long) is missing. Doesn't
this suggest some kind of Tomcat issue? Other requests for the same resource
are passed through the filter chain (without Tomcat restarting in between or
anything like that). The problem just went away after 40 minutes or so.

java.lang.NullPointerException
    at
com.REDACTED.ManifestController.getHeaderConfig(ManifestController.java:209)
    at sun.reflect.GeneratedMethodAccessor474.invoke(Unknown Source)
    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:221)
    at
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
    at
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114)
    at
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
    at
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
    at
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
    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:622)
    at
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
    at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
    at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
    at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
    at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100)
    at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687)
    at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
    at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
    at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

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