Home » Eclipse Projects » Remote Application Platform (RAP) » Application Freeze occasionally(Application freeze with thread deadlocks)
| Application Freeze occasionally [message #1102123] |
Thu, 05 September 2013 11:48  |
 Ramesh Pank
Messages: 1
Registered: September 2013 |
Junior Member |
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Hello,
This is related to a forum topic earlier - http://www.eclipse.org/forums/index.php/t/378202/
There has been no resolution to that and we also face the same issue now. From the thread locks below I notice a deadlock with the UIThread. There are no errors on the server logs. We use JBOSS EAP6 and RAP1.4. Anyone who faced the same issue or know of any actions that could help me identify the root cause is greatly appreciated.
Deadlock Detection:
Found one Java-level deadlock:
=============================
"Thread-5338":
waiting to lock Monitor@0x00007fcf3455e8d0 (Object@0x00000007b9840650, a java/lang/Object),
which is held by "UIThread [qOPWJHhgYk1JbITv-IKJoq+y]"
"UIThread [qOPWJHhgYk1JbITv-IKJoq+y]":
waiting to lock Monitor@0x00007fcf480016e0 (Object@0x00000007b988c380, a com/speedware/imodernize/rapclient/StatusThread),
which is held by "Thread-5338"
Found a total of 1 deadlock.
Thread 3169: (state = BLOCKED)
- sun.misc.Unsafe.park(boolean, long) @bci=0 (Compiled frame; information may be imprecise)
- java.util.concurrent.locks.LockSupport.parkNanos(java.lang.Object, long) @bci=20, line=196 (Interpreted frame)
- java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(java.util.concurrent.SynchronousQueue$TransferStack$SNode, boolean, long) @bci=174, line=424 (Compiled frame)
- java.util.concurrent.SynchronousQueue$TransferStack.transfer(java.lang.Object, boolean, long) @bci=102, line=323 (Interpreted frame)
- java.util.concurrent.SynchronousQueue.poll(long, java.util.concurrent.TimeUnit) @bci=11, line=874 (Interpreted frame)
- java.util.concurrent.ThreadPoolExecutor.getTask() @bci=62, line=955 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor$Worker.run() @bci=23, line=917 (Compiled frame)
- java.lang.Thread.run() @bci=11, line=662 (Interpreted frame)
Thread 25461: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
- com.speedware.imodernize.rapclient.StatusThread.run() @bci=24, line=41 (Interpreted frame)
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| Re: Application Freeze occasionally [message #1103071 is a reply to message #1102123] |
Fri, 06 September 2013 10:54  |
Ivan Furnadjiev
Messages: 2426
Registered: July 2009
Location: Sofia, Bulgaria |
Senior Member |
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Hi,
I have no answer to your question, but what is this thread -
com/speedware/imodernize/rapclient/StatusThread?
Best,
Ivan
On 9/5/2013 6:06 PM, Ramesh Pank wrote:
> Hello,
>
> This is related to a forum topic earlier - http://www.eclipse.org/forums/index.php/t/378202/
> There has been no resolution to that and we also face the same issue now. From the thread locks below I notice a deadlock with the UIThread. There are no errors on the server logs. We use JBOSS EAP6 and RAP1.4. Anyone who faced the same issue or know of any actions that could help me identify the root cause is greatly appreciated.
>
> Deadlock Detection:
>
> Found one Java-level deadlock:
> =============================
>
> "Thread-5338":
> waiting to lock Monitor@0x00007fcf3455e8d0 (Object@0x00000007b9840650, a java/lang/Object),
> which is held by "UIThread [qOPWJHhgYk1JbITv-IKJoq+y]"
> "UIThread [qOPWJHhgYk1JbITv-IKJoq+y]":
> waiting to lock Monitor@0x00007fcf480016e0 (Object@0x00000007b988c380, a com/speedware/imodernize/rapclient/StatusThread),
> which is held by "Thread-5338"
>
> Found a total of 1 deadlock.
>
> Thread 3169: (state = BLOCKED)
> - sun.misc.Unsafe.park(boolean, long) @bci=0 (Compiled frame; information may be imprecise)
> - java.util.concurrent.locks.LockSupport.parkNanos(java.lang.Object, long) @bci=20, line=196 (Interpreted frame)
> - java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(java.util.concurrent.SynchronousQueue$TransferStack$SNode, boolean, long) @bci=174, line=424 (Compiled frame)
> - java.util.concurrent.SynchronousQueue$TransferStack.transfer(java.lang.Object, boolean, long) @bci=102, line=323 (Interpreted frame)
> - java.util.concurrent.SynchronousQueue.poll(long, java.util.concurrent.TimeUnit) @bci=11, line=874 (Interpreted frame)
> - java.util.concurrent.ThreadPoolExecutor.getTask() @bci=62, line=955 (Compiled frame)
> - java.util.concurrent.ThreadPoolExecutor$Worker.run() @bci=23, line=917 (Compiled frame)
> - java.lang.Thread.run() @bci=11, line=662 (Interpreted frame)
>
>
> Thread 25461: (state = BLOCKED)
> - java.lang.Object.wait(long) @bci=0 (Interpreted frame)
> - com.speedware.imodernize.rapclient.StatusThread.run() @bci=24, line=41 (Interpreted frame)
>
--
Ivan Furnadjiev
Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/
Professional services for RAP and RCP?
http://eclipsesource.com/services/rap/
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| Re: Application Freeze occasionally [message #1130211 is a reply to message #1129099] |
Wed, 09 October 2013 10:18 |
Ivan Furnadjiev
Messages: 2426
Registered: July 2009
Location: Sofia, Bulgaria |
Senior Member |
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Hi Seb,
do you have a simple snippet to reliably reproduce the hang? Does it
happen with all borwsers - IE8-10, Chrome, Firefox, Opera?
Best,
Ivan
On 10/8/2013 12:33 PM, Seb L wrote:
> Hello!
>
> I have this long-standing problem, too.
>
> There was an RAP-Update which changed the timeout/retransmit-handling
> which improved the situation, but it's still there.
>
> To me it seems that it could be a problem at HTTP-level, because the
> problem occurs more often when I have the RAP-application behind a
> reverse proxy. I'm using Apache's mod_proxy, and the situation seems
> to improve if I turn the "flushpackets"-parameter (see
> http://httpd.apache.org/docs/2.2/mod/mod_proxy.html#proxypass) on.
>
> A thread-dump doesn't reveal anything special, at least to my eyes. It
> looks similar as in
> http://www.eclipse.org/forums/index.php/mv/msg/378202/918894/#msg_918894
> .
>
> I was always hoping it would "just go away" with some RAP-update and
> have never had the time to investigate deeper. On the other hand, I
> didn't really think that I was the only one having this problem.
>
>
> Regards
>
--
Ivan Furnadjiev
Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/
Professional services for RAP and RCP?
http://eclipsesource.com/services/rap/
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