JDK-7031895 : Regression caused by 6984287 needs to be fixed in 6uxx
  • Type: Bug
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 6u25
  • Priority: P3
  • Status: Closed
  • Resolution: Duplicate
  • OS: solaris
  • CPU: sparc
  • Submitted: 2011-03-29
  • Updated: 2011-03-29
  • Resolved: 2011-03-29
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JDK 6
6-poolResolved
Related Reports
Duplicate :  
JDK-6668573 - CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
Relates :  
JDK-7028845 - CMS: 6984287 broke parallel reference processing in CMS
Description
Fix for 6984287: Regularize how GC parallel workers are specified, caused CMS to hang:

-----------------  lwp# 3 / thread# 3  --------------------
 fffffd7ffedfd262 ???????? () + ffffffffffb36252
 fffffd7ffe9fa619 __1cTCMSRefProcTaskProxyNdo_work_steal6MipnbECMSParDrainMarkingStackClosure_pnWCMSParKeepAliveClosure_pi_v_ () + 7b9
 fffffd7ffe9f9d83 __1cTCMSRefProcTaskProxyEwork6Mi_v_ () + 293
 fffffd7ffeed2238 __1cKGangWorkerEloop6M_v_ () + d8
 fffffd7ffeed2129 __1cKGangWorkerDrun6M_v_ () + 29
 fffffd7ffed7b849 java_start () + 1f9
 fffffd7fff2c6ddb _thr_setup () + 5b
 fffffd7fff2c7010 _lwp_start ()
-----------------  lwp# 4 / thread# 4  --------------------
 fffffd7ffee52ed7 __1cWParallelTaskTerminatorRoffer_termination6MpnUTerminatorTerminator__b_ () + c7
 fffffd7ffe9fa619 __1cTCMSRefProcTaskProxyNdo_work_steal6MipnbECMSParDrainMarkingStackClosure_pnWCMSParKeepAliveClosure_pi_v_ () + 7b9
 fffffd7ffe9f9d83 __1cTCMSRefProcTaskProxyEwork6Mi_v_ () + 293
 fffffd7ffeed2238 __1cKGangWorkerEloop6M_v_ () + d8
 fffffd7ffeed2129 __1cKGangWorkerDrun6M_v_ () + 29
 fffffd7ffed7b849 java_start () + 1f9
 fffffd7fff2c6ddb _thr_setup () + 5b
 fffffd7fff2c7010 _lwp_start ()

This issue is fixed in 7 with 6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads.

This needs to be fixed in jdk 6 as well.