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From bo zhao <somany...@gmail.com>
Subject so many thread are blocked
Date Wed, 05 Nov 2014 03:17:38 GMT
I used command <jstack> to dump threads of tomcat, and I found that 183
threads are blocked, why?

thread dump like this:

Deadlock Detection:

No deadlocks found.

Thread 2584: (state = BLOCKED)
 - java.lang.Object.wait(long) @bci=0 (Compiled frame; information may be
imprecise)
 - java.lang.Object.wait() @bci=2, line=485 (Compiled frame)
 - org.apache.tomcat.util.net.JIoEndpoint$Worker.await() @bci=8, line=458
(Compiled frame)
 - org.apache.tomcat.util.net.JIoEndpoint$Worker.run() @bci=11, line=484
(Interpreted frame)
 - java.lang.Thread.run() @bci=11, line=662 (Interpreted frame)


Thread 2583: (state = BLOCKED)
 - java.lang.Object.wait(long) @bci=0 (Compiled frame; information may be
imprecise)
 - java.lang.Object.wait() @bci=2, line=485 (Compiled frame)
 - org.apache.tomcat.util.net.JIoEndpoint$Worker.await() @bci=8, line=458
(Compiled frame)
 - org.apache.tomcat.util.net.JIoEndpoint$Worker.run() @bci=11, line=484
(Compiled frame)
 - java.lang.Thread.run() @bci=11, line=662 (Interpreted frame)


Thread 2572: (state = BLOCKED)
 - java.lang.Object.wait(long) @bci=0 (Compiled frame; information may be
imprecise)
 - java.lang.Object.wait() @bci=2, line=485 (Compiled frame)
 - org.apache.tomcat.util.net.JIoEndpoint$Worker.await() @bci=8, line=458
(Compiled frame)
 - org.apache.tomcat.util.net.JIoEndpoint$Worker.run() @bci=11, line=484
(Interpreted frame)
 - java.lang.Thread.run() @bci=11, line=662 (Interpreted frame)

...


thanks.

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