On 20/06/2016 20:58, Craig Lynch wrote: > We run embedded tomcat on version 8, and for some reason are consistently > seeing extreme slowness across all Tomcat endpoints at very consistent > intervals of three hours. Once a site gets into the slow state, it is never > able to recover, and stays unresponsive (requests take tens of minutes to > hours) until the service is manually restarted. > > There are no resource issues that I've been able to detect (heap seems > fine, no apparent memory leaks, cpu is fine, network/db connections aren't > exhausted, etc). Tomcat does seem to receive the requests, but for some > reason does not seem to be processing them. > > There is an exception that occurs right around the time the service goes > into a bad state, which is the reason I believe this to be a Tomcat issue. > The stack trace is as follows: > > Exception in thread "mc-26" java.lang.IllegalMonitorStateException > at java.util.concurrent.locks.ReentrantLock$Sync.tryRelease(Unknown > Source) > at > java.util.concurrent.locks.AbstractQueuedSynchronizer.release(Unknown > Source) > at java.util.concurrent.locks.ReentrantLock.unlock(Unknown Source) > at java.util.concurrent.LinkedBlockingQueue.take(Unknown Source) > at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103) > at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31) > at java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) > at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > at > org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) > at java.lang.Thread.run(Unknown Source)
And when you Googled "IllegalMonitorStateException LinkedBlockingQueue" what did you find? Mark --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
