java hangs on futex_wait

[Amahdy]

*I sent the following to OpenJDK mailing list:

Hey there!
I'm running fedora 10, with OpenJDK 1.6, and developing with NetBeans 6.5, lately I got a problem with any java application, I can't run any java-based application and always receiving a "futex_wait" hanging on any java based application, I mean, when I run a java-based application I get a hanging interface and when i take a look at running process I see the java process is hanging in "futex_wait" FOR EVER and the application won't run ... I mean here by java-based application a application developed by me maybe, or any other like "netbeans" itself I cant run it, neither "logfactor5", nor any java application or applet for example ...

what I did lately in the system before that appears was installaing "fedora eclipse", and updated the system, I removed all the eclipse stuff and the problem still there, please help me to fix it and/or fix the bug ... Thanks!

*And received this answer:
You should probably ask on a Fedora mailing list. You should also use
jps and jstack to get a stack dump from the stuck process.

** Anybody could help me on solving this please?

[Amahdy]

I was able finally to run a java-based application after noticing some strange behavior on my PC, and I need some help on how to fix it:

First, after a clear boot on my Fedora 10, I notice that "gvfs-fuse-daemon" is in futex_wait channel, then I tried to run a java-based application so I noticed that it's gettin in futex_wait, and another process also get this which is "imsettings-applet" ...

What I did next is killing all those three process, then retry to run my netbeans and finally it works ... the problem now is after re-boot, the "gvfs-fuse-daemon" come up in futex_wait again and I need each time to kill it ... is it a bug in it? should I find a way to completley remove it from the system? or there is any specific known fix ??

Thanks!

[Amahdy]

another thing:
If I boot up, then just kill "gvfs-fuse-daemon", this wont make netbeans run, when I run netbeans I get this "imsettings-applet" in futex_wait chanell and must kill it before being able to run netbeans ...

overall, what happens is that I must kill both of "imsettings-applet" and "gvfs-fuse-daemon" processes to be able to use the java ... how can I fix this???

[Amahdy]

I just tried to start by killing "imsettings-applet" first, but that doesn't change anything, I'm not sure if it's the responsible of the futex_wait of "gvfs-fuse-daemon" but again what the only thing I know now is that I must kill them and any previous futex_wait process [like a java-based application that was in the memory] ...
ok so any thoughts?

[Amahdy]

this was solved after receiving a couple of updates today including a firefox update ... hope that it wont appear again coz I never got a respose here on what was happening!!!

[KTF]

I have ran into the exact same problem. My problem isn't related to netbeans in any way. It seems to be related to Swing. I was programming a Java Swing application in Eclipse when at somepoint I decided to run/test my application and BAM it hang instantaneously after starting it. A quick strace revealed the 'crashed' JVM was in futex_wait.

Other Java Swing applications like Adempiere are also affected by this. SWT applications like Azureus and Eclipse don't seem to be affected.

Edit: For completeness sake: This was with the Sun JDK 1.6.0_13

[Amahdy]

I received a notification from redhat mailing list that this should be fixed after 'imsettings' and 'OpenJDK' update ... just check for system updates and download them ...

[RupertPupkin]

Try installing the libX11 update fix. That seems to have fixed a lot of problems people have been having with Java, Emacs, and a whole bunch of other GUi apps after a recent update.

[KTF]

I fully updated my Fedora 10 installation yesterday so that shouldn't be the problem. For some reason a reboot stopped the problem from occurring. Well as long as it stays that way that's good enough for me I guess