On May 21, 2014, at 2:28 AM, ravishankar_d <ravishanka...@infosys.com> wrote:
> Hi Dan, > > We are using apache web server provided along with RHEL.So I believe we are > getting back port fixes. > In the threaddump we are seeing the below long running threads many times. At a quick glance it doesn’t seem like it would be problematic, just reading data. > As mentioned, we are using AJP(with BIO) and tomacat 7.0.52. I wanted to know > if this will cause any issues like system hung over a period of time. Both mod_jk and mod_proxy will keep connections open to Tomcat (i.e. pool them). If not tuned correctly, they can cause you to run out of threads in Tomcat (which could look like Tomcat has hung). One way to test this is to disable the pooling (i.e. disablereuse=Off or JkOptions +DisableReuse). If you disable it and you don’t see any more of these threads then you’ve found the culprit. From there you can either tune the connection pooling or just run with it disabled. > Also we are thinking of NIO protocol instead of BIO for AJP A good idea. If you’re trying to troubleshoot this problem, I’d stick with BIO though. NIO may very well just mask the problem. Dan > > > "ajp-bio-10.181.42.51-9011-exec-112" daemon prio=10 tid=0x00000000161aa000 > nid=0x776c runnable [0x00002b23c3c64000] > java.lang.Thread.State: RUNNABLE > at java.net.SocketInputStream.socketRead0(Native Method) > at java.net.SocketInputStream.read(SocketInputStream.java:152) > at java.net.SocketInputStream.read(SocketInputStream.java:122) > at org.apache.coyote.ajp.AjpProcessor.read(AjpProcessor.java:309) > at org.apache.coyote.ajp.AjpProcessor.readMessage(AjpProcessor.java:364) > at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:121) > at > org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607) > at > org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313) > - locked <0x00000007b25a5b58> (a > org.apache.tomcat.util.net.SocketWrapper) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) > at java.lang.Thread.run(Thread.java:744) > > Locked ownable synchronizers: > - <0x00000007b25e7618> (a > java.util.concurrent.ThreadPoolExecutor$Worker) > > Regards, > Ravi > > > > > > -- > View this message in context: > http://tomcat.10.x6.nabble.com/AJP-protocol-with-Apache-Tomcat-Version-7-0-52-tp5017650p5017727.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 > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
