IV58624: JAVA PROGRAM CRASHES AFTER KEYTOOL CREATES A SHARED CLASS CACHE

APAR status

• Closed as program error.

Error description

• Error Message: A SIGSEGV, GPF, or S0C4 ABEND is raised in an
  AOT-compiled Java method that has been loaded from the shared
  class cache. The shared class cache has previously been created
  with the Java "keytool" utility, which was invoked with class
  sharing enabled.
  .
  Stack Trace:
  org/apache/harmony/security/fortress/Services$NormalServices.sor
  tDefaultProviderInfos()org/apache/harmony/security/fortress/Serv
  ices$NormalServices.getService()org/apache/harmony/security/fort
  ress/Services$NormalServices.access$2900()org/apache/harmony/sec
  urity/fortress/Services.getService()org/apache/harmony/security/
  fortress/Engine.getInstance()java/security/KeyStore.getInstance(
  )
  .
  

Local fix

• This issue can be avoided by disabling AOT compilations with the
  -Xnoaot option.
  

Problem summary

• The problem is caused by missing relocation records in the
  AOT-compiled method. The missing records cause a second JVM
  instance to skip required compatibility checks when loading the
  compiled code from the shared class cache. As a result, the JVM
  incorrectly concludes that the code can be loaded and executed,
  when the code is in fact invalid for that JVM instance.
  

Problem conclusion

• This APAR will be fixed in the following Java Releases:
     6 R1 SR8       (6.1.8.0)
  .
  The JIT compiler has been updated to generate relocation records
  correctly in this case.
  

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

  JIT

• Fixed component ID

  620700124

Applicable component levels

• R260 PSY

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