PH20006: Increase Of CPU Consumption With Liberty 19.0.0.3 20/05/19 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• After migrating to Liberty 19.0.0.3 CICS experiences an increase
  in CPU consumption.  Health Center data shows that method
  org.eclipse.osgi.internal.log.LoggerImpl.getLocation() is
  consuming a large (50%+) amount of the CPU cycles of those
  sampled.
  
  To circumvent this problem update server.xml to include:
  
  <logging traceSpecification="logservice=info"/>
  
  or
  
  <logging traceSpecification="logservice=warning"/>
  

Local fix

• add the following line to the Liberty server.xml:
  
  
  
  <logging traceSpecification="logservice=info"/>
  
  
  
  If such a tag already exists, then append :logservice=info to
  the value.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users with any of the following     *
  *                 PTFs applied:                                *
  *                                                              *
  *                 CICS TS 5.1: UI63151                         *
  *                 CICS TS 5.2: UI63153                         *
  *                 CICS TS 5.3: UI63157 UI67364                 *
  *                 CICS TS 5.4: UI63155 UI67366                 *
  *                 CICS TS 5.5: UI63159 UI64379 UI66360         *
  ****************************************************************
  * PROBLEM DESCRIPTION: Liberty startup performance             *
  *                      degradation.                            *
  ****************************************************************
  After applying the PTFs for CICS Liberty 19.0.0.3, 19.0.0.6,
  19.0.0.9 or 19.0.0.12 Liberty JVMSERVERs and applications take
  longer to start.
  
  This is as a result of changes to the Equinox OSGi logging
  service which were included in Liberty 19.0.0.3.
  
  Health Center Method Profiling analysis of an affected JVMSERVER
  will show very high execution of
  org.eclipse.osgi.internal.log.LoggerImpl.getLocation().
  

Problem conclusion

• UI63151 UI63153 UI63157 UI67364 UI63155 UI67366 UI63159 UI64379
  UI66360
  
  The version of CICS Liberty has been updated to 20.0.0.3.  This
  includes the fix for Open Liberty issue 10412 which prevents
  the performance impact described above.
  

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:

Modules/Macros

• DFHAPJVM DFHAPLJP DFHAXIS2 DFHCAL64 DFHCDJNI DFHCDK64 DFHKETIX
  DFHSJBD  DFHSJDM  DFHSJDS  DFHSJDUF DFHSJIN  DFHSJIS  DFHSJIX
  DFHSJJS  DFHSJL   DFHSJLOG DFHSJNA  DFHSJNDI DFHSJNR  DFHSJNT
  DFHSJPP  DFHSJPTI DFHSJRE  DFHSJRL  DFHSJRM  DFHSJRT  DFHSJSA
  DFHSJSC  DFHSJSM  DFHSJSR  DFHSJST  DFHSJTE  DFHSJTH  DFHSJTRI
  DFHSJWL  DFHSJXM  DFHWLPAX DFJ@H350 DFJ@H356 DFJ@H360 DFJ@H387
  DFJ@H427 DFJ@H448 DFJ@H467 DFJ@H468 DFJ@H561 DFJDTCOE DFJOUTRE
  DFJWLPBP DFJWLPPL
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R00L PSY UI69614

     UP20/05/21 P F005 ­

• R10L PSY UI69610

     UP20/05/23 P F005 ­

• R20L PSY UI69617

     UP20/05/23 P F005 ­

• R80L PSY UI69609

     UP20/05/27 P F005 ­

• R90L PSY UI69612

     UP20/05/28 P F005 ­

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.