IJ58951: FREQUENT INVOCATIONS OF PROCESSHANDLE.ISALIVE() OR RELATED PROCESSHANDLE APIS CAN CAUSE UNBOUNDED NATIVE MEMORY GROWTH DUE TO UN

APAR status

• Closed as program error.

Error description

• Error Message:
  .
  Stack Trace: None
  .
  

Local fix

Problem summary

• Each call to a ProcessHandle API triggers the native functions
  os_getParentPidAndTimings() and/or os_getChildren(), which
  allocate process-query buffers using malloc() but never free
  them on any return path. As a result, the native heap grows with
  every invocation, leading to a native memory leak on z/OS. Over
  time, repeated calls can accumulate a significant amount of
  leaked memory, potentially resulting in increased native memory
  usage, and degraded performance.
  

Problem conclusion

• The fix ensures that all allocated buffers are properly released
  on every execution path, including error exits, preventing
  native memory from being retained and eliminating the memory
  leak.
  .
  This APAR will be fixed in the following Releases:
  .
  IBM Semeru Runtimes
     21              21.0.12.10
     17              17.0.20.10
     11              11.0.32.10
  .
  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

  OPENJDK CLASS L

• Fixed component ID

  621800100

Applicable component levels