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  1. JDK
  2. JDK-6922246

Deadlock during intensive class loading in parallel

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    • Subcomponent:
    • CPU:
      generic
    • OS:
      generic

      Description

      For quite a while, across different VM testruns rare timeouts in some PCL tests have been observed.
      The hang was reproduced with jdk7b79 on linux-i586.
      "-server -Xcomp -XX:+UseConcMarkSweepGC" VM options were used.

      It's really rare - it takes ~10k runs to get a hang, so I haven't tried other JDK/VM versions/VM options so far.

      Java & native stack traces are attached.

      How to reproduce:
      1) ssh vmsqe-core2q-15
      2) cd /net/vmsqe.russia/export/home/vi158347/PCL
      3) run rerun.sh multiple times

      The following tests are affected:
      runtime/ParallelClassLoading/delegate-system/dynamic-init/abstract
      runtime/ParallelClassLoading/delegate-system/dynamic-init/inner-complex

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              Assignee:
              coleenp Coleen Phillimore
              Reporter:
              vlivanov Vladimir Ivanov
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