Leon Rosenberg-3 wrote: > > 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 > http://old.nabble.com/file/p27305988/DQWorkflow.java DQWorkflow.java > http://old.nabble.com/file/p27305988/Workflow.java Workflow.java > > 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. >
Those Workflow and DQWorkflow classes are from our company, written by the programmer who worked on this project before me. I have attached the two files for further examination. I have noticed the performWorkflowAction method in DQWorkflow is not synchronized and uses Vectors and Iterators. Could this be a possible problem? Even though this all has been working perfectly fine in Java 4 and 5? -- View this message in context: http://old.nabble.com/Tomcat-100--CPU-usage-after-moving-from-Java-5-to-6-tp27305110p27305988.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
