PH63066: RESOURCE LEAKAGE: FILE HANDLES TO TRANLOG DIRECTORY

APAR status

• Closed as program error.

Error description

• When the transaction service is configured to be part of a
  Recovery Group and the file system is used to store the
  transaction service's recovery logs, the peer lease checking
  mechanism leaks filehandles resulting in increased memory
  usage and eventually the application server may terminate with a
  java.lang.OutOfMemoryError
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  WebSphere Liberty Application Server        *
  *                  users of Transaction Service Recovery       *
  *                  Groups                                      *
  ****************************************************************
  * PROBLEM DESCRIPTION: Recovery Groups for file system based   *
  *                      recovery logs, if configured, cause a   *
  *                      memory leak resulting in                *
  *                      java.lang.OutOfMemoryError              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Lease checking for transaction service 'Recovery Groups' for
  file system based transaction recovery logs does not close the
  instances of java.util.stream.Stream it uses when processing
  the leases.  This causes a memory leak and eventually memory
  exhaustion resulting in java.lang.OutOfMemoryError.
  This issue was caused by a regression introduced in 24.0.0.4
  by https://github.com/OpenLiberty/open-liberty/pull/27928
  

Problem conclusion

• Lease checking for Recovery Groups was modified to
  correctly close the Streams it used when scanning leases for
  file system base recovery log.
  
  The fix for this APAR is targeted for inclusion in fix pack
  24.0.0.10. For more information, see 'Recommended Updates for
  WebSphere Application Server':
  https://www.ibm.com/support/pages/node/715553
  

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

  WAS LIBERTY COR

• Fixed component ID

  5725L2900

Applicable component levels