Hi folks, We encountered the same problem where tomcat on our linux box will hang occasionally after several days, and we have yet to find the cause of the problem. Looks like this might solve our problem :). Here is our configuration :
OS : Redhat Tomcat : 4 JVM : IBM JDK1.4 I would like to know more about how should we go about configuring the LD_ASSUME_KERNEL. Please correct me if I am wrong. > setenv LD_ASSUME_KERNEL 2.2.5 and that will do the trick? Does it depends on any kernel version? Besides that, we observed that some of the threads that tomcat started did not die after a few days, here is a snapshot of the tomcat processes (as an example): [say I started the tomcat at 19 October and today is 22 October, but there are still some threads running on 20 October] tomcat4 1554 1 0 Oct19 ? 00:00:19 /opt/IBMJava2-141/bin/java -Djav tomcat4 1587 1554 0 Oct19 ? 00:00:00 /opt/IBMJava2-141/bin/java -Djav tomcat4 1588 1587 0 Oct19 ? 00:00:00 /opt/IBMJava2-141/bin/java -Djav tomcat4 1589 1587 0 Oct19 ? 00:00:00 /opt/IBMJava2-141/bin/java -Djav tomcat4 1590 1587 0 Oct19 ? 00:00:00 /opt/IBMJava2-141/bin/java -Djav tomcat4 2071 1587 0 Oct19 ? 00:00:00 /opt/IBMJava2-141/bin/java -Djav tomcat4 2072 1587 0 Oct19 ? 00:00:00 /opt/IBMJava2-141/bin/java -Djav ..... tomcat4 2088 1587 0 Oct20 ? 00:00:00 /opt/IBMJava2-141/bin/java -Djav tomcat4 2089 1587 0 Oct20 ? 00:00:00 /opt/IBMJava2-141/bin/java -Djav I guess this might be the same issue here as well. Any comment would be much appreciated. Thanks. Regards, Hui ----- Original Message ----- From: "Francois JEANMOUGIN" <[EMAIL PROTECTED]> To: "Tomcat Users List" <[EMAIL PROTECTED]> Sent: Tuesday, October 21, 2003 12:45 AM Subject: RE: tomcat jitters, then hangs - please help Hi, LD_ASSUME_KERNEL > > Problem: Tomcat Server becomes unresponsive to new requests after > several > > hours, regardless of load. > > OS RH9; Tomcat 4 or 5; VM Sun or IBM (JDK 1.4) > > Solve: (tcsh): setenv LD_ASSUME_KERNEL 2.2.5 [...] > Q: would the assume kernel 2.4 work as well ? I believe it would, but > it > could be worth confirming it eventually. This is not critical, > obviously. I understood LD_ASSUME_KERNEL is controlling the way the libpthread interact with both the kernel and the applications. I saw lot of things written about this supposed-to-be improved lib from RedHat but the optimizations doesn't seem to be usable by those popular Jvm. François. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
