My apologies, that is the offending thread, see below: (Should I open a ticket to attach full dumps?)
Found one Java-level deadlock: ============================= "Thread-96": waiting to lock monitor 0x3a0d6938 (object 0x80048462700, a java.util.concurrent.ConcurrentHashMap), which is held by "Thread-29" "Thread-29": waiting to lock monitor 0x3a0d58b0 (object 0x1000bbc1dd20, a java.lang.Object), which is held by "Event Manager Thread_QuartzSchedulerThread" "Event Manager Thread_QuartzSchedulerThread": waiting to lock monitor 0x3803a2c0 (object 0x800674b7830, a org.apache.catalina.loader.ParallelWebappClassLoader), which is held by "Thread-29" On Tue, Nov 20, 2018 at 12:50 PM Mark Thomas <ma...@apache.org> wrote: > On 20/11/2018 15:21, Andrew Carr wrote: > > Hello, > > > > We have been seeing some intermittent issues with the parallel > > classloader. I do not want to jump to any conclusions and say this is a > > bug w/ the classloader, but we are getting deadlocked threads, pretty > > randomly, when launching the server. I was wondering if anyone had > > experienced this issue or if you could review the attached thread dump > and > > give me some feedback. > > > > There is no associated log file for the time the deadlock was occurring, > I > > am working on getting that. In unrelated log files I saw some > concurrency > > exceptions, non-thread safe access to lists basically. I believe that > > issue has been corrected in the source code, and I am not sure the > > concurrency exception has anything to do with the deadlock occurring > during > > classloading. > > > > Personally I am of the belief that unsafe maps / lists could possibly > cause > > the classloader to deadlock. > > > > I can put the full dumps in a ticket, I just hate to open another > > classloader ticket. > > I don't see a deadlock in the provided stack trace. > > Mark > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org > For additional commands, e-mail: dev-h...@tomcat.apache.org > > -- With Regards, Andrew Carr e. andrewlanec...@gmail.com w. andrew.c...@openlogic.com h. 4235255668 c. 4239489206 a. P.O. Box 1231, Greeneville, TN, 37744
