I am able to trigger a similar looking bug (java process entered uninterruptible sleep) while running NetBeans.
Steps to reproduce: #go to netbeans download page http://netbeans.org/downloads/start.html?platform=zip&lang=en&option=javase wget http://download.netbeans.org/netbeans/7.0.1/final/zip/netbeans-7.0.1-201107282000-ml-javase.zip unzip netbeans-7.0.1-201107282000-ml-javase.zip cd netbeans/bin/ ./netbeans #Manually accept the GPL license. #The stall hits after the loading modules and plugins "spash screen" when the main gui and welcome screen are visible #A popup bubble gets displayed indicating that 17 updates (or more ) are available. #try click on Help menu -> About and verify that you are running jamvm. (you cant the gui are stalled) #check dmesg and observe that the kernel have detected the freeze I am able to reproduce this bug on a ac100 that makes java enter the uninterruptible sleep (D) state without any output from netbeans. kernel I was not able to trigger the uninterruptible stall on a pandaboard running oneiric. kernel Here instead I see a "regular stall" like this: xranby@panda:~/netbeans/bin$ ./netbeans jmm_GetInputArgumentArray jmm_GetBoolAttribute: Unknown attribute 24 jmm_DumpThreads jmm_DumpThreads jmm_DumpThreads jmm_DumpThreads jmm_DumpThreads jmm_DumpThreads ... <endless loop> netbeans gui are stalled. The testcase above do work fine on ia32 when using jamvm. here the output are: xranby@xranby-ESPRIMO-P7935:~/netbeans/bin$ ./netbeans jmm_GetInputArgumentArray jmm_GetMemoryUsage jmm_GetMemoryUsage jmm_GetMemoryUsage ... <gets displayed a lot> netbeans remains responsive. I will forward this testcase to jamvm upstream and check if the stalls are related to the three unimplemented jmm_* JMX management extensions. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/845158 Title: Frequent java task hang on ARM server To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openjdk-6/+bug/845158/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
