java is 1.4.2, the SO is Linux, but we could not dump the comsuming thread because of teh -Xrs option. Now we removed it, but we have old libraries and no CPU problem. In an identical test environment the same problem does not arise, even with -Xrs option and new libraries version.
Any ideas? Thanks Christopher Schultz-2 wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > MSerraInsiel, > > On 3/20/2009 5:40 AM, MSerraInsiel wrote: >> Hi all, We have a java web application (deployed on Tomcat 5.5 with java >> 1.4) >> that has never had CPU problems. > > Take thread dumps while the CPU is pegged. You didn't mention your Java > version, so here goes: > > - - If you have Java 1.5+, you should have the 'jstack' program. Run > that targeting the pid of the top-level Java process and you should > get a complete thread dump. > > OR > > - - On UNIX, send a SIGSTOP to the main java process and look at the > output in catalina.out. > > OR > > - - On Windows, you'll need to press CTRL-\ when running Tomcat from the > command-line. I'm not sure how else to get a thread dump from java > on Windows, so if you're running it as a service, you might have to > stop Tomcat, re-start it from the command line (startup.bat) and > then press CTRL-\ after your CPU goes high. > > Take thread dumps a few seconds apart, then examine them. Threads that > say "BLOCKED" are not using any CPU (at least, not at the time the > thread dump was taken). Anything that says "RUNNABLE" should be > inspected to see what it's doing. > > Post your thread dumps to the list if you can't figure out what's going > on. > > - -chris > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.9 (MingW32) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ > > iEYEARECAAYFAknDqpsACgkQ9CaO5/Lv0PAWEwCfcQ3n9YoOFKElIWqdgjf01WHZ > U8EAn32cdrguG0RUOTGoUCm6vJZV9ozr > =woZD > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > > -- View this message in context: http://www.nabble.com/Tomcat-CPU-100--tp22617067p22621751.html Sent from the Tomcat - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
