IJ46813: JVM'S SIGUSR2 SIGNAL HANDLER OVERWRITES NATIVE APP'S SIGUSR2 SIGNAL HANDLER

APAR status

• Closed as program error.

Error description

• Error Message: The JVM's SIGUSR2 signal handler overwrites the
  native application's SIGUSR2 signal handler in the absence of
  signal chaining.
  .
  Stack Trace: N/A
  .
  N/A
  

Local fix

• -Xrs can be used to disable the JVM's SIGUSR2 signal handler.
  This will prevent the native application's SIGUSR2 signal
  handler from being overwritten in the absence of signal
  chaining. However, this will also disable all signal handlers in
  the JVM.
  

Problem summary

• The JVM's SIGUSR2 signal handler overwrites the native
  application's SIGUSR2 signal handler in the absence of signal
  chaining.
  

Problem conclusion

• -XX:-HandleSIGUSR2 has been added to disable only the JVM's
  SIGUSR2 signal handler, which will prevent the native
  application's SIGUSR2 signal handler from being overwritten in
  the absence of signal chaining.
  .
  This APAR will be fixed in the following Releases:
  .
  IBM Semeru Runtimes
     11              11.0.19.0
     17              17.0.7.0
  IBM SDK, Java Technology Edition
     8    SR8 FP5   (8.0.8.5)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the available
  maintenance can be found at:
             https://www.ibm.com/support/pages/java-sdk
  

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