Hi, Isn't that normal? Only one thread can be accepting at any time, when it accepts, it releases the lock for the next one to enter the accept state. I think those are not the threads you are looking for…
Regards, Miguel Arroz On 2012-09-10, at 8:03 AM, Maik Musall <[email protected]> wrote: > Hi, > > in an app with high concurrency, the app sometimes becomes unresponsive to > everything but DirectActions at the time of day with the most concurrency. > All users aren't seeing responses any more. In jstack I see hundreds of these: > >> "WorkerThread207" prio=5 tid=131e0a800 nid=0x151aa2000 waiting for monitor >> entry [151aa1000] >> java.lang.Thread.State: BLOCKED (on object monitor) >> at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:406) >> - waiting to lock <20d3da450> (a java.net.SocksSocketImpl) >> at java.net.ServerSocket.implAccept(ServerSocket.java:462) >> at java.net.ServerSocket.accept(ServerSocket.java:430) >> at >> com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java:210) >> at java.lang.Thread.run(Thread.java:680) > > all waiting on the same lock 20d3da450, and one thread holding that lock: > >> "WorkerThread206" prio=5 tid=131d79800 nid=0x15199f000 runnable [15199e000] >> java.lang.Thread.State: RUNNABLE >> at java.net.PlainSocketImpl.socketAccept(Native Method) >> at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:408) >> - locked <20d3da450> (a java.net.SocksSocketImpl) >> at java.net.ServerSocket.implAccept(ServerSocket.java:462) >> at java.net.ServerSocket.accept(ServerSocket.java:430) >> at >> com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java:210) >> at java.lang.Thread.run(Thread.java:680) > > Anyone familiar with this problem? > > Maik > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Webobjects-dev mailing list ([email protected]) > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/webobjects-dev/arroz%40guiamac.com > > This email sent to [email protected] _______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to [email protected]
