Need some additional help. I have combed through thread dumps from a time period when
the Jboss was using %80 of CPU and then some after I restarted, right after and a few
days after. I found one peculiar thread. Before describing further, there's an issue
one user is having that seems to happen around the same time as this CPU issue. I'm
suspicious that it may be causing this somehow. On occasion, when this user is
executing a step that uploads a file via HTTP content, the server side upload process
seems to hang on the last chunk of the file. This is not a chunked interface. The
entire file is uploaded at one time. On the server, the data (file) is read in
chunks. The process seems to hang on the last chunk of bytes to be read. I'm
suspicious that the HTTP content is either corrupted somehow in transit or by
processing on the client. First, I hope to determine if this could be our problem.
Next, the thread dump: The following output was found in all three thread dumps that
I grabbed while the system was slow. They are a few hours apart. This output does
not appear in any that I have grabbed over a period of days since restarting Jboss.
Any feedback is appreciated
Allen
"TP-Processor25" daemon prio=5 tid=0xc19998 nid=0x77 runnable [dc77f000..dc781994]
at org.apache.log4j.Category.isDebugEnabled(Category.java:742)
at
org.apache.commons.logging.impl.Log4JLogger.isDebugEnabled(Log4JLogger.java:224)
at org.apache.jk.server.JkCoyoteHandler.doRead(JkCoyoteHandler.java:273)
at org.apache.coyote.Request.doRead(Request.java:457)
at
org.apache.coyote.tomcat4.CoyoteInputStream.readBytes(CoyoteInputStream.java:197)
at org.apache.coyote.tomcat4.CoyoteInputStream.read(CoyoteInputStream.java:154)
at
com.idexx.servlet.IdexxHttpUploadServlet.readBytesIntoBuffer(IdexxHttpUploadServlet.java:85)
at com.idexx.econsult.servlet.ECGUploadServlet.doPost(ECGUploadServlet.java:80)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.jboss.web.tomcat.security.JBossSecurityMgrRealm.invoke(JBossSecurityMgrRealm.java:220)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at
org.jboss.web.tomcat.tc4.statistics.ContainerStatsValve.invoke(ContainerStatsValve.java:76)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2417)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:65)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:577)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:197)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:309)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:387)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:673)
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:615)
at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:786)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:677)
at java.lang.Thread.run(Thread.java:536)
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