IT05286: 100% CPU LOAD WHEN USING XSL TRANSFORMS IN LAZY PARSING MODE.

Version 8.5.0 Fix Pack 2 for the IBM Business Process Manager products
Version 8.5 Refresh Pack 7 for the IBM Business Process Manager products

APAR status

• Closed as program error.

Error description

• When using XSL Transforms in Lazy Parsing mode in a mediation
  under load a timing issue in the code can arise when 2 or more
  threads try to access the same XSL transform at the same time.
  This can result in 100% CPU usage which remains until the
  server is restarted.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users of Business Process Manager v8.5 who use XSL Transforms
  under load
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  When running under load an issue with the XSL Transforms can
  cause the CPU to jump to 100% utilization and remain there until
  the server is recycled.
  

Problem conclusion

• If two or more threads were using the same preparedTransform
  instance at the same time, as might happen under load, then this
  would cause an issue that would see the CPU utilization rise to
  100%. To avoid this the use of preparedTransform was protected
  to avoid two threads using it at the same time.
  

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

  WESB IN BPM

• Fixed component ID

  AIMCMFC00

Applicable component levels

• R850 PSY

     UP