Sorry I forgot to include couple of more stats Tomcat is running on linux FC4 Client browser is IE 6.0
First line of the dump is "http-0.0.0.0-80-Processor99" daemon prio=1 tid=0x8b09b4b8 nid=0x46ec runnable [0x84be7000..0x84be91c0] Thx --- Kumar Pandey <[EMAIL PROTECTED]> wrote: > Hi > I'm using Tomcat 5.0.26 that comes with JBoss > 3.2.5 > with default configurations > > A servlet creates pie/bar charts using JFreeChart. > This is refreshed every 5 seconds via javascript > refresh in the brower. All this has been workign > fine > for most customers. > Suddenly for a specific customer sessions coming > from > a specific newtwork/georaphical location we see that > the 5 seconds chart refreshes are hanging the > thread. > Charts are 20 KB. For a single user in the system > sometimes these requests are talking up 20 ~30 > threads > and each stuck for 15~16 minutes before it finally > clears up. > We ran ethereal on the tcp packet and see that when > the threads are hung, browser is sending FIN, ACK > eventhough server hasn't completed sending the data. > Thus we see TCP retranmissions of same packets as > its > not receiveing any ack from the client. > > How do I troubleshoot this issue. > System is not memory starved and cpu is 98% idle. > > Any pointers on trouble shooting this would be > greatly > appreciated. > > Thanks > Kumar > > Here's the thread dump of one of the hung request. > > java.net.SocketOutputStream.socketWrite0(Native > java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92) > java.net.SocketOutputStream.write(SocketOutputStream.java:136) > org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(InternalOutputBuffer.java:714) > org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:398) > org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:318) > org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite(InternalOutputBuffer.java:737) > org.apache.coyote.http11.filters.ChunkedOutputFilter.doWrite(ChunkedOutputFilter.java:125) > org.apache.coyote.http11.InternalOutputBuffer.doWrite(InternalOutputBuffer.java:569) > org.apache.coyote.Response.doWrite(Response.java:542) > org.apache.coyote.tomcat5.OutputBuffer.realWriteBytes(OutputBuffer.java:368) > org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:398) > org.apache.coyote.tomcat5.OutputBuffer.doFlush(OutputBuffer.java:318) > org.apache.coyote.tomcat5.OutputBuffer.flush(OutputBuffer.java:297) > org.apache.coyote.tomcat5.CoyoteOutputStream.flush(CoyoteOutputStream.java:85) > sun.awt.image.codec.JPEGImageEncoderImpl.writeJPEGStream(Native > locked > sun.awt.image.codec.JPEGImageEncoderImpl.encode(JPEGImageEncoderImpl.java:472) > sun.awt.image.codec.JPEGImageEncoderImpl.encode(JPEGImageEncoderImpl.java:228) > locked > sun.awt.image.codec.JPEGImageEncoderImpl.encode(JPEGImageEncoderImpl.java:235) > locked > org.jfree.chart.encoders.SunJPEGEncoderAdapter.encode(SunJPEGEncoderAdapter.java:139) > org.jfree.chart.encoders.EncoderUtil.writeBufferedImage(EncoderUtil.java:136) > org.jfree.chart.ChartUtilities.writeChartAsJPEG(ChartUtilities.java:442) > org.jfree.chart.ChartUtilities.writeChartAsJPEG(ChartUtilities.java:388) > com.transerainc.rtmcui.util.ChartUtil.drawChartAsJPEG(ChartUtil.java:46) > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam > protection around > http://mail.yahoo.com > > --------------------------------------------------------------------- > To unsubscribe, e-mail: > [EMAIL PROTECTED] > For additional commands, e-mail: > [EMAIL PROTECTED] > > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
