Hi,
At times our users experience very slow response times. During one such incident I captured a few
thread dumps ( 3-4 dumps at 5-10 second intervals). In all the thread dumps I find one thing in common, most of the threads look like they are busy writing to a socket...
===================================================
"ExecuteThread: '22' for queue: 'weblogic.kernel.Default'" daemon prio=5 tid=0xec85f8 nid=0x21 runnable [ce780000..ce7819bc]
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
at weblogic.servlet.internal.ChunkUtils.writeChunkNoTransfer(ChunkUtils.java:260)
at weblogic.servlet.internal.ChunkUtils.writeChunks(ChunkUtils.java:225)
at weblogic.servlet.internal.ChunkOutput.flush(ChunkOutput.java:296)
at weblogic.servlet.internal.ChunkOutput.checkForFlush(ChunkOutput.java:371)
at weblogic.servlet.internal.ChunkOutput.writeStream(ChunkOutput.java:326)
at weblogic.servlet.internal.ChunkOutputWrapper.writeStream(ChunkOutputWrapper.java:154)
at weblogic.servlet.internal.ServletOutputStreamImpl.writeStream(ServletOutputStreamImpl.java:584)
at weblogic.servlet.internal.ServletOutputStreamImpl.writeStream(ServletOutputStreamImpl.java:573)
at weblogic.servlet.FileServlet.sendFile(FileServlet.java:571)
at weblogic.servlet.FileServlet.service(FileServlet.java:208)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:971)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:402)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:305)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6350)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:317)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3635)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2585)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
=========================================================
I have very limited knowledge about the app and I don't see any method calls in the thread dump to pinpoint the source of the bottleneck. Any ideas on how I should proceed and what information if any I can get from the above thread dump.
Thank you so much..
Wap