IV64749: ASSERTION FAILURE DURING JVM STARTUP WHEN USING AN EXISTING SHAR ED CLASS CACHE WITH -XSHARECLASSES OPTION

APAR status

• Closed as program error.

Error description

• Error Message: ASSERTION FAILED at CompositeCache.cpp:3860(line
  number may slightly vary across releases)
  .
  Stack Trace:
  SH_CompositeCacheImpl::unprotectHeaderReadWriteAreaSH_CompositeC
  acheImpl::doUnlockCacheSH_CompositeCacheImpl::exitWriteMutexSH_C
  ompositeCacheImpl::startupSH_CacheMap::startupj9shr_initJ9VMDllM
  ainrunJ9VMDllMainpool_dorunInitializationStageprotectedInitializ
  eJavaVMj9sig_protectinitializeJavaVMJNI_CreateJavaVM
  .
  

Local fix

• Clear the shared class cache using -Xshareclasses:destroy option
  

Problem summary

• This problem is caused when a JVM exits unexpectedly while
  updating data in shared class cache. Due to abnormal
  termination, the shared class cache is left unusable though the
  data in the cache is still in consistent state. This causes
  another JVM attempting to use the same shared class cache to
  assert during startup.
  

Problem conclusion

• The JVM has been updated to recover from such conditions and
  startup properly using the existing shared class cache.
  .
  This APAR will be fixed in the following Java Releases:
     6 R1 SR8 FP2   (6.1.8.2)
     7 R1 SR2       (7.1.2.0)
     6    SR16 FP2  (6.0.16.2)
     7    SR8       (7.0.8.0)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, Java maintenance is available
  from:
             https://www.ibm.com/developerworks/java/jdk/
  

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

• R270 PSY

     UP

• R600 PSY

     UP