IV19636: CRASH IN JAVA_COM_IBM_LANG_MANAGEMENT_THREADMXBEANIMPL_GETMULTIT HREADINFOIMPL

APAR status

• Closed as program error.

Error description

• Error Message: Type=Segmentation error vmState=0x00000000
  J9Generic_Signal_Number=00000004 Signal_Number=0000000b
  Error_Value=00000000 Signal_Code=00000001
  __kernel_sigtramp_rt64+0x0 (0x0000000000100418)
  (0x000004000614EE9C <OSB>libjclse7b_26.so+0x5ee9c<CSB>)
  (0x000004000614CADC <OSB>libjclse7b_26.so+0x5cadc<CSB>)
  Java_com_ibm_lang_management_ThreadMXBeanImpl_getMultiThreadInfo
  Impl+0xfff935a0 (0x000004000614D450
  <OSB>libjclse7b_26.so+0x5d450<CSB>)
  (0x0000040048D54860 <OSB><unknown>+0x0<CSB>)
  (0x0000040000BDF1A0 <OSB>libj9vm26.so+0xaf1a0<CSB>)
  (0x0000040000CEBC7C <OSB>libj9prt26.so+0x3bc7c<CSB>)
  (0x0000040000BDF018 <OSB>libj9vm26.so+0xaf018<CSB>)
  (0x0000040000C5BC6C <OSB>libj9thr26.so+0xbc6c<CSB>)
  (0x0000008005ACBFC0 <OSB>libpthread.so.0+0xbfc0<CSB>)
  clone+0xfff58c90 (0x00000080058DFF28
  <OSB>libc.so.6+0x11ff28<CSB>)
  ---------------------------------------
  JVMDUMP039I Processing dump event "gpf", detail "" at 2012/01/31
  11:20:49 - please wait.
  .
  Stack Trace: #11 <signal handler called>
  #12 0x000004000616f4f8 in .saveObjectRefs () from
  libjclse7b_26.so
  #13 0x000004000616d0dc in .getArrayOfThreadInfo ()
     from libjclse7b_26.so
  #14 0x000004000616da50 in
  .Java_com_ibm_lang_management_ThreadMXBeanImpl_getMultiThreadInf
  oImpl ()
     from libjclse7b_26.so
  #15 0x000004000dbe1bd0 in ?? ()
  #16 0x0000040000bdf220 in .javaProtectedThreadProc () from
  libj9vm26.so
  #17 0x0000040000cebc7c in .j9sig_protect () from libj9prt26.so
  #18 0x0000040000bdf098 in .javaThreadProc () from libj9vm26.so
  #19 0x0000040000c5bc6c in .thread_wrapper () from libj9thr26.so
  #20 0x000000806210c0d0 in .start_thread () from
  /lib64/libpthread.so.0
  #21 0x000000806201029c in .__clone () from /lib64/libc.so.6
  .
  

Local fix

Problem summary

• Crash caused by mishandling JIT optimized object monitors.
  

Problem conclusion

• This defect will be fixed in:
  7.0.0 SR1
  6.0.1 SR2
  6.0.0 SR11
  .
  The JVM has been updated to handle optimized object monitors
  correctly.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  J9 COMMON CODE

• Fixed component ID

  620700127

Applicable component levels

• R260 PSY

     UP

• R600 PSY

     UP