IJ46681: OUTOFMEMORY (OOM) KILLER TERMINATES THE JVM DUE TO FAILURE IN CONTROL GROUPS DETECTION

APAR status

• Closed as program error.

Error description

• Error Message: The operating system's OOM killer terminates the
  JVM in a containerized environment.
  .
  Stack Trace:
  .
  

Local fix

• Option 1. Revert to cgroups v1 on the worker node
  Set the kernel parameter systemd.unified_cgroup_hierarchy=0 to
  force cgroups v1. This is a node-level change and may affect
  other workloads on the host.
  
  Option 2. Cap the JVM heap explicitly
  Set -Xmx to a value below the container memory limit so the JVM
  does not exceed the containers memory budget.
  

Problem summary

• The operating system's OOM killer terminates the JVM in a
  containerized environment.
  

Problem conclusion

• The JVM has been updated to correctly detect the control groups
  settings. This allows the JVM to correctly set the upper memory
  limit and function within this limit. Further, this stops the
  operating system's OOM killer from terminating the JVM in a
  containerized environment.
  .
  This APAR will be fixed in the following Releases:
  .
  IBM Semeru Runtimes
     17              17.0.8.0
     11              11.0.20.1 (z/OS)
     11              11.0.20.0 (Distributed)
     8               8.0.382.0
  IBM SDK, Java Technology Edition
     8    SR8 FP6   (8.0.8.6)
  .
  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