Wild guess, but given that there are a large number of threads waiting to be notified, it might be possible that the Weblogic detects those hung threads and cleans them after a while, putting the additional delay (27 minutes!) in your application. The performance impact might have nothing to do with xalan, but with app server.
Just a thought... Adolfo -----Original Message----- From: Holk, David A [mailto:[EMAIL PROTECTED] Sent: Friday, May 21, 2004 12:28 PM To: '[EMAIL PROTECTED]' Subject: intermittent XALAN performance issue Hi everyone, I've got a fun one here I hope one of you enlightened souls can help me with. I am experiencing an intermittent performance problem with the javax.xml.transform.Transformer.transform(src, res) call. I am using xalan 2.4.1. - When I run a specific transformation job (exact files data every time) in my development environment (Windows2000, Weblogic 7.1) it always takes approximately 15 seconds. - When I run this same job in our test and production environments (Solaris, Weblogic 7.1) it normally takes 15 seconds but sometimes takes between 15 and 27 minutes to run. - Sometimes if I restart the Weblogic server instance I am deploying to, the job will go back to taking 15 seconds. - When the job appears to be hung, there are plenty of threads and plenty of RAM available according to the Weblogic console. I included a thread dump below from one of the Solaris boxes that was taken while the job was hanging in hopes one of you can make more sense of it than I can. Any insight or suggestions would be appreciated. David Holk "ExecuteThread: '4' for queue: 'default'" daemon prio=5 tid=0x11dee0 nid=0x11 waiting on monitor [0xcfa81000..0xcfa819d8] at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:415) at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:105) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:129) "ExecuteThread: '3' for queue: 'default'" daemon prio=5 tid=0x11d5a0 nid=0x10 waiting on monitor [0xcfb81000..0xcfb819d8] at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:415) at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:105) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:129) "ExecuteThread: '2' for queue: 'default'" daemon prio=5 tid=0x238510 nid=0xf runnable [0xcfc81000..0xcfc819d8] at java.io.ObjectOutputStream.writeStreamHeader(ObjectOutputStream.java:700) at java.io.ObjectOutputStream.<init>(ObjectOutputStream.java:154) at weblogic.rjvm.OutboundMsgAbbrev.writeObject(OutboundMsgAbbrev.java:80) at weblogic.rjvm.OutboundMsgAbbrev.writeAbbrevs(OutboundMsgAbbrev.java:60) at weblogic.rjvm.OutboundMsgAbbrev.write(OutboundMsgAbbrev.java:43) at weblogic.rjvm.MsgAbbrevJVMConnection.writeMsgAbbrevs(MsgAbbrevJVMConnection. java:186) at weblogic.rjvm.MsgAbbrevJVMConnection.sendMsg(MsgAbbrevJVMConnection.java:154 ) at weblogic.rjvm.ConnectionManager.sendMsg(ConnectionManager.java:537) at weblogic.rjvm.RJVMImpl.send(RJVMImpl.java:541) at weblogic.rjvm.MsgAbbrevOutputStream.flushAndSendRaw(MsgAbbrevOutputStream.ja va:250) at weblogic.rjvm.MsgAbbrevOutputStream.flushAndSend(MsgAbbrevOutputStream.java: 258) at weblogic.rjvm.MsgAbbrevOutputStream.send(MsgAbbrevOutputStream.java:319) at weblogic.t3.srvr.ClientRequest.tryToSendObject(ClientContext.java:646) at weblogic.t3.srvr.ClientRequest.execute(ClientContext.java:696) at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:153) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:134) "ExecuteThread: '1' for queue: 'default'" daemon prio=5 tid=0x2383d0 nid=0xe waiting on monitor [0xcfd81000..0xcfd819d8] at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:415) at weblogic.kernel.ExecuteThread.waitForRequest(ExecuteThread.java:105) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:129) LEGAL NOTICE Unless expressly stated otherwise, this message is confidential and may be privileged. It is intended for the addressee(s) only. Access to this E-mail by anyone else is unauthorized. If you are not an addressee, any disclosure or copying of the contents of this E-mail or any action taken (or not taken) in reliance on it is unauthorized and may be unlawful. If you are not an addressee, please inform the sender immediately.
