Java crash in dynaTrace libdtagentcore.so

Solution Verified - Updated

Environment

  • Red Hat JBoss Enterprise Web Server 1.0.0
  • DynaTrace native libraries.

Issue

  • A JVM crash was noticed and the following was found in the hs_err_<pid> file created:
#
# An unexpected error has been detected by HotSpot Virtual Machine:
#
#  SIGSEGV (0xb) at pc=0x00002ae4ea50aaaa, pid=14496, tid=47166551357760 
#
# Java VM: Java HotSpot(TM) 64-Bit Server VM (1.5.0_22-b03 mixed mode)
# Problematic frame:
# C  [libdtagentcore.so+0xb7aaa]
#

---------------  T H R E A D  ---------------

Current thread is native thread

Resolution

  • Test the latest dynaTrace release to see if the issue has been resolved.
  • Workaround: Remove the dynaTrace agent.
  • Contact the vendor of the dynaTrace native libraries to examine this further.

Root Cause

  • There appears to be a bug in the native libraries that is forcing the JVM to crash under certain conditions.

Diagnostic Steps

  • Obtained hs_err_<pid> files from the crash.
  • Examining these the following trace was noticed:
#
# An unexpected error has been detected by HotSpot Virtual Machine:
#
#  SIGSEGV (0xb) at pc=0x00002ae4ea50aaaa, pid=14496, tid=47166551357760 
#
# Java VM: Java HotSpot(TM) 64-Bit Server VM (1.5.0_22-b03 mixed mode)
# Problematic frame:
# C  [libdtagentcore.so+0xb7aaa]
#

---------------  T H R E A D  ---------------

Current thread is native thread
  • Looking for this library the following path was observed:
/app/path/dynaTrace/agent/lib64/libdtagent.so
/app/path/dynaTrace/agent/downloads/5.5.0.5226/native/linux-x86-64/libdtagentcore.so
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