Why JRockit VM for WebLogic Server Could Not Log FDlimits While Starting Up
Last updated on NOVEMBER 05, 2016
Applies to:
Oracle Weblogic Server - Version 9.0 to 12.1.1.0Linux Itanium
Linux x86
Haansoft Linux x86-64
JRockit, PosixSocketMuxer , EPollSocketMuxer
Symptoms
For most of the other JVM WebLogic Server could log FDLimit in server log, while using JRockit it could not. This document illustrate why this is happened and how to get this information while using JRockit VM.
Changes
For using SUN HotSpot JDK, WebLogic Server will log FdLimits like below while starting up an instance.
####<Nov 3, 2011 11:19:39 AM CST> <Info> <Server> <echopc> <AdminServer> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <> <> <> <1320290379273> <BEA-002609> <Channel Service initialized.>
####<Nov 3, 2011 11:19:39 AM CST> <Info> <Socket> <echopc> <AdminServer> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <> <> <> <1320290379285> <BEA-000415> <System has file descriptor limits of - soft: 1,024, hard: 1,024>
####<Nov 3, 2011 11:19:39 AM CST> <Info> <Socket> <echopc> <AdminServer> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <> <> <> <1320290379285> <BEA-000416> <Using effective file descriptor limit of: 1,024 open sockets/files.>
####<Nov 3, 2011 11:19:39 AM CST> <Info> <Socket> <echopc> <AdminServer> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <> <> <> <1320290379285> <BEA-000406> <PosixSocketMuxer was built on Aug 1 2007 15:18:49>
####<Nov 3, 2011 11:19:39 AM CST> <Info> <Socket> <echopc> <AdminServer> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <> <> <> <1320290379320> <BEA-000436> <Allocating 3 reader threads.>
####<Nov 3, 2011 11:19:39 AM CST> <Info> <Socket> <echopc> <AdminServer> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <> <> <> <1320290379321> <BEA-000446> <Native IO Enabled.>
####<Nov 3, 2011 11:19:39 AM CST> <Info> <Socket> <echopc> <AdminServer> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <> <> <> <1320290379285> <BEA-000415> <System has file descriptor limits of - soft: 1,024, hard: 1,024>
####<Nov 3, 2011 11:19:39 AM CST> <Info> <Socket> <echopc> <AdminServer> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <> <> <> <1320290379285> <BEA-000416> <Using effective file descriptor limit of: 1,024 open sockets/files.>
####<Nov 3, 2011 11:19:39 AM CST> <Info> <Socket> <echopc> <AdminServer> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <> <> <> <1320290379285> <BEA-000406> <PosixSocketMuxer was built on Aug 1 2007 15:18:49>
####<Nov 3, 2011 11:19:39 AM CST> <Info> <Socket> <echopc> <AdminServer> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <> <> <> <1320290379320> <BEA-000436> <Allocating 3 reader threads.>
####<Nov 3, 2011 11:19:39 AM CST> <Info> <Socket> <echopc> <AdminServer> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <> <> <> <1320290379321> <BEA-000446> <Native IO Enabled.>
When the JRockit VM is used, the server will not log the FdLimit for the instance like in the above.
Cause
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