IV58519: RACE CONDITION IN EXCEPTION HANDLING

APAR status

• Closed as program error.

Error description

• Error Message: N/A
  .
  Stack Trace: #0  0x7d53a820 in raise () from
  /lib/libpthread.so.0#1  0x7c9c59ec in j9dump_create () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9prt27.so#2  0x7c807190 in doSystemDump () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9dmp27.so#3  0x7c9d2efe in j9sig_protect () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9prt27.so#4  0x7c805c78 in runDumpFunction () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9dmp27.so#5  0x7c808da2 in runDumpAgent () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9dmp27.so#6  0x7c81af06 in triggerDumpAgents () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9dmp27.so#7  0x7ca61f14 in generateDiagnosticFiles () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9vm27.so#8  0x7c9d2efe in j9sig_protect () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9prt27.so#9  0x7ca61d52 in structuredSignalHandler () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9vm27.so#10 0x7c9d2b40 in masterSynchSignalHandler () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9prt27.so#11 <signal handler called>#12 0x7ba0fe60 in
  buildVerifyErrorString () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9dyn27.so#13 0x7ba0982c in internalDefineClass () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9dyn27.so#14 0x7b878288 in defineClassCommon () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libjclse7b_27.so#15 0x7b86e038 in
  Java_java_lang_ClassLoader_defineClassImpl ()from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libjclse7b_27.so#16 0x7a727084 in ?? ()#17 0x7ca554ac in
  internalFindClassUTF8 () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9vm27.so#18 0x7ca57b8c in internalFindClassString () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9vm27.so#19 0x7ca48226 in Fast_java_lang_Class_forNameImpl
  () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9vm27.so#20 0x7a725d7e in ?? ()#21 0x7b8b13c4 in
  JVM_InvokeMethod_Impl () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libjclse7b_27.so#22 0x7a120e9e in
  Java_sun_reflect_NativeMethodAccessorImpl_invoke0 () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/libjava
  .so#23 0x7a7060ba in ?? ()#24 0x7caa574c in
  javaProtectedThreadProc () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9vm27.so#25 0x7c9d2efe in j9sig_protect () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9prt27.so#26 0x7caa569e in javaThreadProc () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9vm27.so#27 0x7d55e1d8 in thread_wrapper () from
  /j9vm/ascii/builds/bld_172261/sdk/xz3170_27/jre/lib/s390/default
  /libj9thr27.so#28 0x7d532c32 in start_thread () from
  /lib/libpthread.so.0#29 0x7d484e42 in thread_start () from
  /lib/libc.so.6
  .
  

Local fix

Problem summary

• The problem is caused by a race condition when retrieving
  exception error message.
  

Problem conclusion

• This APAR will be fixed in the following Java Releases:
     7 R1 SR1       (7.1.1.0)
     7    SR7       (7.0.7.0)
     6 R1 SR8       (6.1.8.0)
  .
  The GC has been updated to prevent the crash from occurring when
  retrieving exception error message.
  

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

• R270 PSY

     UP

• R260 PSY

     UP