In 022_zookeeper_metrics.png, server names are anonymized. Looks like only one server got high number of connections.
Have you seen 9.3.1.1 of http://hbase.apache.org/book.html#client ? Cheers On Mon, Jan 5, 2015 at 8:57 AM, Serega Sheypak <serega.shey...@gmail.com> wrote: > Hi, here is repost with images link > > Hi, I'm still trying to deal with apache tomcat web-app and hbase HBase > 0.98.6 > The root problem is that user threads constantly grows. I do get thousands > of live threads on tomcat instance. Then it dies of course. > > please see visualVM threads count dynamics > http://bigdatapath.com/wp-content/uploads/2015/01/01_threads_count-grow.png > > > Please see selected thread. It should be related to zookeeper (because of > thread-name suffix SendThread) > > http://bigdatapath.com/wp-content/uploads/2015/01/011_long_running_threads.png > > The threaddump for this thread is: > > "visit-thread-27799752116280271-EventThread" - Thread t@75 > java.lang.Thread.State: WAITING > at sun.misc.Unsafe.park(Native Method) > - parking to wait for <34671cea> (a > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) > at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186) > at > > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043) > at > java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) > at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:494) > > Locked ownable synchronizers: > - None > > Why does it live "forever"? I next 24 hours I would get ~1200 live theads. > > "visit thread" does simple put/get by key, newrelic says it takes 30-40 ms > to respond. > I just set a name for the thread inside servlet method. > > Here is CPU profiling result: > http://bigdatapath.com/wp-content/uploads/2015/01/03_cpu_prifling.png > > Here is zookeeper status: > http://bigdatapath.com/wp-content/uploads/2015/01/022_zookeeper_metrics.png > > How can I debug and get root cause for long living threads? Looks like I > got threads leaking, but have no Idea why... > > > > > 2015-01-05 17:57 GMT+03:00 Ted Yu <yuzhih...@gmail.com>: > > > I used gmail. > > > > Please consider using third party site where you can upload images. > > > > >
