take a look on threads ajp-8009-2 ajp-8009-18 ajp-8009-30 ajp-8009-38 they are all seem to be either in an infinite loop: at java.util.AbstractList$Itr.hasNext(AbstractList.java:339) at nl.indicia.vip.framework.util.Workflow.performWorkflowAction(Workflow.java:166) at nl.indicia.vip.framework.util.DQWorkflow.performWorkflowAction(DQWorkflow.java:56) at org.apache.jsp.bamplaza.componenten.workflow.xmlworkflow_jsp._jspService(xmlworkflow_jsp.java:382)
or iterating over a very huge list. This way or other they are consuming your cpu: "ajp-8009-18" Id=187 in RUNNABLE cpu=236296 ms usr=236265 ms blocked 315 for -1 ms waited 256 for -1 ms "ajp-8009-2" Id=171 in RUNNABLE cpu=221968 ms usr=218734 ms blocked 12822 for -1 ms waited 10071 for -1 ms "ajp-8009-30" Id=199 in RUNNABLE cpu=371562 ms usr=368234 ms blocked 9527 for -1 ms waited 7543 for -1 ms "ajp-8009-38" Id=210 in RUNNABLE cpu=518890 ms usr=515593 ms blocked 10352 for -1 ms waited 9035 for -1 ms So either its a bug (maybe a concurrency issue, since java 1.6. has improved a lot in terms of lock contention reduction) or, its a side effect of an out of memory problem, can you make a heap dump with jmap and check whether your Old Gen is 99.9999% full? Otherwise you should look into at nl.indicia.vip.framework.util.Workflow.performWorkflowAction(Workflow.java:166) which I never heard of, and don't have sources to check, what's happening there exactly. Good luck Leon On Mon, Jan 25, 2010 at 12:14 PM, Pid <p...@pidster.com> wrote: > On 25/01/2010 11:08, Jesse Klaasse wrote: >> >> I am running a production environment for a website (over half a million >> hits per day), using Tomcat 5.5.20 (I'm stuck to that version due to >> support restrictions) behind IIS 6 using JK connector 1.2.28, >> tcnative-1.dll (1.1.19) on Windows Server 2003 R2 Enterprise x64 SP2 >> (with 16 GB RAM). Until last week, I have been using Sun Java 5. Last >> week I have upgraded the JDK to Sun Java 6. >> The system uses a MS SQL Server 2005 database, which resides on another >> server. >> That's when things went wrong. At first, all seemed fine (average CPU >> usage seems lower than when using Java 5), but after an hour or so (30 >> minutes - 1,5 hour max) after a Tomcat restart, Tomcat's CPU usage jumps >> to 100% (average CPU usage using Java 5 is around 30-40%, peaks around >> 60%). I can't really figure out what is causing this. I have retried >> about 6 restarts (including a complete system reboot), but without any >> success. When I move back to Java 5, the problems are gone. >> My Tomcat Java arguments: >> -Dcatalina.base=D:\tomcat -Dcatalina.home=D:\tomcat >> -Djava.endorsed.dirs=D:\tomcat\common\endorsed >> -Djava.io.tmpdir=D:\tomcat\temp >> >> -Djavax.sql.DataSource.Factory=org.apache.commons.dbcp.BasicDataSourceFactory >> -Dcom.sun.management.jmxremote -XX:MaxPermSize=512m >> -Xloggc:D:\logs\gc\tomcat-gc.log -XX:+PrintGCDetails -XX:+UseParNewGC >> -XX:+UseConcMarkSweepGC -XX:+UseTLAB -XX:+CMSClassUnloadingEnabled >> -XX:+CMSPermGenSweepingEnabled -Xms4096m -Xmx10240m >> Some further information which could be important: >> - I have tried to reproduce the problems on my development environment >> (using jMeter for generating server load), but without success; >> - I have created some thread dumps during the 100% CPU periods (attached >> as a zip file); >> I would really like to make the move to Java 6, since Java 5's is EOL. >> Any ideas, anyone? > > Have you tested those memory and garbage collection settings with this > version of Java? > > What does the garbage collection log indicate, normal or abnormal activity? > > Java 6 has some pretty good tools for examining a running JVM, have a nose > around in the java/bin directory. > > > p > > > > > > >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org >> For additional commands, e-mail: users-h...@tomcat.apache.org > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org