IV68689: CRASH WHILE WRITING A JAVACORE DUMP, WHEN RUNNING A LARGE NUMBER OF JAVA THREADS

APAR status

• Closed as program error.

Error description

• Error Message: After a Java dump is triggered, the JVM issues a
  JVMDUMP032I "JVM requested Java dump" message, followed by a
  crash and JVM termination. The Java dump produced is truncated.
  .
  Stack Trace: #0  0x00007ff0017d8aeb in insertNode () from
  ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
  s/libj9dmp24.so#1  0x00007ff0017d8b77 in insertNode () from
  ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
  s/libj9dmp24.so#2  0x00007ff0017d8b77 in insertNode () from
  ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
  s/libj9dmp24.so#3  0x00007ff0017d8b77 in insertNode () from
  ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
  s/libj9dmp24.so#4  0x00007ff0017d8b77 in insertNode () from
  ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
  s/libj9dmp24.so#5  0x00007ff0017d8b77 in insertNode () from
  ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
  s/libj9dmp24.so#6  0x00007ff0017d8b77 in insertNode () from
  ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
  s/libj9dmp24.so#7  0x00007ff0017d8b77 in insertNode () from
  ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
  s/libj9dmp24.so#8  0x00007ff0017d8318 in avl_insert () from
  ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
  s/libj9dmp24.so#9  0x00007ff0017cf37f in
  JavaCoreDumpWriter::writeThreadSection() from
  ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
  s/libj9dmp24.so
  .
  The Java application is running a large number of Java threads
  (typically 4,000 to 5,000).
  

Local fix

• Disable Java dumps using the command line option
  -Xdump:java:none.
  

Problem summary

• The problem is caused when the JVM is running a large number of
  Java threads and a Java dump is triggered.
  

Problem conclusion

• The JVM has been updated to prevent the crash from occurring. If
  the JVM is running a large number of Java threads (typically
  4,000 or more), the amount of information collected and written
  to the Java dump for each thread is reduced by omitting the
  native stack.
  .
  This APAR will be fixed in the following Java Releases:
     6    SR16 FP4  (6.0.16.4)
     6 R1 SR8 FP4   (6.1.8.4)
     7 R1 SR3       (7.1.3.0)
     8    SR1       (8.0.1.0)
     7    SR9       (7.0.9.0)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the Service
  Refreshes and Fix Packs can be found at:
             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

• R600 PSY

     UP

• R260 PSY

     UP

• R270 PSY

     UP