JDK-7016079 : VM deadlock during intensive parallel class loading
  • Type: Bug
  • Component: hotspot
  • Sub-Component: runtime
  • Affected Version: hs20
  • Priority: P3
  • Status: Closed
  • Resolution: Duplicate
  • OS: generic
  • CPU: generic
  • Submitted: 2011-01-31
  • Updated: 2012-02-01
  • Resolved: 2011-02-01
Related Reports
Duplicate :  
JDK-6789220 - CMS: intermittent timeout running nsk/regression/b4796926
Description
HotSpot can deadlock in VM code during intensive parallel class loading.

I was able to manually reproduce the hang with HS20b06/7b126 using "-server -Xcomp -XX:+StartAttachListener -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode" options(Java and native thread dumps are included), but I saw similar hangs during b124/b125 testing with both JIT-compilers (mixed/comp modes):
http://vmsqe.russia.sun.com/execution/results/JDK7/PROMOTION/VM/7/b124/ParallelGC/vm/linux-i586/client/mixed/linux-i586_vm__client_mixed_vm.parallel_class_loading.testlist/analysis.html
http://vmsqe.russia.sun.com/execution/results/JDK7/PROMOTION/VM/7/b125/ConcMarkSweepIncGC/vm/linux-i586/server/comp/linux-i586_vm__server_comp_vm.parallel_class_loading.testlist/analysis.html
http://vmsqe.russia.sun.com/execution/results/JDK7/PROMOTION/VM/7/b125/ConcMarkSweepIncGC/vm/solaris-sparc/server/comp/solaris-sparc_vm__server_comp_vm.parallel_class_loading.testlist/analysis.html