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PORandom crashes of Java VM in ConcurrentGCThread
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copied!<p>We have problems with JVMs running internet applications under changing load. This problem comes and goes. One day we see three VMs dying and after that, there is nothing for a week or two. We have not found a pattern yet, found nothing to reproduce or cause it. Also a search in the Sun bug database did not help.</p> <p>We tried a suggested workaround (-XX:-CMSPermGenPrecleaningEnabled -XX:-CMSConcurrentMTEnabled) from <a href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6354939" rel="nofollow noreferrer">http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6354939</a> Did not help. It seem to just change the thread that causes it... or at least make us believe so.</p> <p>Also an upgrade to 1.6.0_13 did not help and the bug request to Sun never returned a response.</p> <p>So my question is, has anyone seen that or has an idea what to look for? Could this be related to OS libraries?</p> <p>Edited: OS is Linux, OpenSuse running on AMD cpus (Linux 2.6.18.8-0.1-dw #3 SMP Thu Mar 15 01:21:48 GMT 2007 x86_64 x86_64 x86_64 GNU/Linux)</p> <pre><code># # An unexpected error has been detected by Java Runtime Environment: # # SIGSEGV (0xb) at pc=0x062c75f5, pid=6667, tid=1090374560 # # Java VM: Java HotSpot(TM) Server VM (11.2-b01 mixed mode linux-x86) # Problematic frame: # V [libjvm.so+0x2c75f5] # # If you would like to submit a bug report, please visit: # http://java.sun.com/webapps/bugreport/crash.jsp # --------------- T H R E A D --------------- Current thread (0x081ddc00): ConcurrentGCThread [stack: 0x40f5c000,0x40fdd000] [id=6679] siginfo:si_signo=SIGSEGV: si_errno=0, si_code=1 (SEGV_MAPERR), si_addr=0x0000000c Registers: EAX=0x00000000, EBX=0x00000008, ECX=0x0bf5e510, EDX=0x42d6dcb0 ESP=0x40fdc150, EBP=0x40fdc168, ESI=0x40fdc200, EDI=0xa19e9640 EIP=0x062c75f5, CR2=0x0000000c, EFLAGS=0x00210206 Top of Stack: (sp=0x40fdc150) 0x40fdc150: 40fdc200 71c70000 0815a748 0815a704 0x40fdc160: a19e9640 40fdc200 40fdc198 062c74cb 0x40fdc170: 40fdc200 a19e9640 0bf5e510 0bf5e510 0x40fdc180: 080ea6f0 40fdc200 00000010 a19e9640 0x40fdc190: ad38a000 40fdc200 40fdc1c8 0629efaa 0x40fdc1a0: 40fdc200 a19e9640 00000100 00000100 0x40fdc1b0: 0815ab00 40fdc200 40fdc2b8 40fdc200 0x40fdc1c0: 080ea5f0 0815a638 40fdc2b8 062c2905 Instructions: (pc=0x062c75f5) 0x062c75e5: 53 83 ec 0c 8b 7d 0c 8b 75 08 8b 47 04 8d 58 08 0x062c75f5: 8b 53 04 89 d1 c1 f9 02 85 d2 7e 6f b8 04 00 00 Stack: [0x40f5c000,0x40fdd000], sp=0x40fdc150, free space=512k Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code) V [libjvm.so+0x2c75f5] V [libjvm.so+0x2c74cb] V [libjvm.so+0x29efaa] V [libjvm.so+0x2c2905] V [libjvm.so+0x2bb461] V [libjvm.so+0x2c9ef5] V [libjvm.so+0x506929] C [libpthread.so.0+0x52ab] </code></pre>

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