IJ50275: THREAD STACK CORRUPTION WHILE GENERATING JAVACORES LEADING TO UNEXPECTED BEHAVIOUR

APAR status

• Closed as program error.

Error description

• Error Message: Detail "java/lang/OutOfMemoryError" "Failed to
  create stack trace (most likely due to lack of OS memory)"
  received.
  .
  Stack Trace: N/A
  .
  

Local fix

• The problem can be worked around by sending USR2("kill -USR2
  <pid>") signal using below Xdump option
  
  -Xdump:java:events=user2,request=exclusive+preempt
  

Problem summary

• The problem is caused while generating javacores which is
  interfering with stack walking code leading to corruption.
  

Problem conclusion

• The JVM has been updated to prevent crashes due to thread stack
  corruptions
  .
  This APAR will be fixed in the following Releases:
  .
  IBM Semeru Runtimes
     21              21.0.3.0
     17              17.0.11.0
     11              11.0.23.0
  IBM SDK, Java Technology Edition
     8    SR 8 PF21  8.0.8.21
  .
  Downloads and supplementary documentation can be found at the
  following locations:
  - For non z/OS operating systems:
    - IBM Semeru Runtimes, Version 11 and later
      https://www.ibm.com/semeru-runtimes/downloads/
    - IBM SDK, Java Technology Edition, Version 8
      https://www.ibm.com/support/pages/java-sdk-downloads/
  - For the z/OS operating system:
    - Java SDK Products on z/OS
      https://www.ibm.com/support/pages/java-sdk-products-zos
  

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