PH68084: OTEL SPAN NOT CREATED FOR JMS APPLICATION RUNNING IN A LIBERTY JVM SERVER

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The OTel Java agent is configured in a Liberty JVM server.
  However when an application running in the Liberty JVM server
  puts a message onto an MQ queue using producer.send() no spans
  are created for the JMS publish or MQ PUT.
  

Local fix

• This problem can be circumvented by not using a Shared Class
  Cache (SCC) with the Liberty JVM server.  This can be achieved
  by removing -Xshareclasses from the JVM profile.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: OTel spans may not automatically be     *
  *                      created by the OTel Java agent in a     *
  *                      Liberty JVM server using a Java Shared  *
  *                      Class Cache.                            *
  ****************************************************************
  A Liberty JVM server is configured with the OTel Java Agent and
  a Java Shared Class Cache (SCC) using bytecode instrumentation
  (using -Xshareclasses:enableBCI or -XX:ShareClassesEnableBCI).
  
  Upon restart of the JVM server OTel spans may no longer be
  created because classes are loaded from the SCC and not
  re-instrumented by the OTel agent.
  

Problem conclusion

• CICS has been updated so that if a Java Agent is being used in a
  Liberty JVM server with a shared class cache then CICS will set
  the -XX:ShareClassesDisableBCI option to disable BCI if BCI has
  not been explicitly enabled.
  
  Note the disabling of BCI can cause an assertion failure so the
  fix for Java APAR IJ57690 must be applied if a Java Agent is
  being used with a Shared Class Cache.
  

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:

  UO08895

Modules/Macros

• DFHAXIS2 DFHCDJNI DFHSJSC  DFHSJT8  DFJ@H360 DFJ@H427 DFJ@H467
  DFJ@H609 DFJDTCOE DFJOUTRE DFJWLPBP DFJWLPPL
  

Fix information

• Fixed component name

  CICS TS Z/OS V6

• Fixed component ID

  5655YA100

Applicable component levels

• R600 PSY UO08895

     UP26/08/07 I 1000

Fix is available

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