PH54360: THE FAILURE IN CONTAINERITERATOR IS INCORRECTLY THROWING THE EXCEPTION WHEN IT SHOULDN'T BE AND CAUSING THE LOGS TO FILL

APAR status

• Closed as program error.

Error description

• Customer had a couple of logging and monitoring outages due to
  full disk space since upgrading to CICS 6.1. The culprit seems
  to be JVM log files :
  
  E.g.
   dfhjvmlog
   dfhjvmout
   dfhjvmtrc
   dfhjvmerr
  
  most of these logs seem related to JCICS Channel
  containerIterator() throwing repeated errors.
  
  [err] 2023/04/29 21:52:36.366000 GMT+08:00
  
  [DFHSJTHP.TASK80070.CJSA] [com.ibm.cics.server] [Channel]
  @Error: getContainerNames exception () - CICS CHANNELERR
  Condition, CHANNEL_ERROR, 2,
  com.ibm.cics.delegate.DelegateError: CICS CHANNELERR Condition
  CHANNEL_ERROR(10) resp=122 resp2=2 abcode=null
  com.ibm.cics.delegate.DelegateError: CICS CHANNELERR Condition
  CHANNEL_ERROR(10) resp=122 resp2=2 abcode=null
      at com.ibm.cics.delegate.impl.DelegateChannelImpl.NativeGet
                                     ContainerNames(NativeMethod)
      at com.ibm.cics.delegate.impl.DelegateChannelImpl.getContain
                             erNames(DelegateChannelImpl.java:125)
      at
  com.ibm.cics.server.Channel.getContainerNames(Channel.java:969)
      at com.ibm.cics.server.ContainerIterator.getContainerNames(
                                      ContainerIterator.java:160)
      at com.ibm.cics.server.ContainerIterator.<init>(Container
                                                Iterator.java:138)
      at
  com.ibm.cics.server.Channel.containerIterator(Channel.java:821)
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS Users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Empty Channel causes exception log      *
  *                      message when creating a                 *
  *                      ContainerIterator.                      *
  ****************************************************************
  An application creates an empty Channel using the JCICS
  Task.createChannel(). It then calls containerIterator() to
  create a ContainerIterator for the Channel. The call is
  successful but an error is incorrectly logged to stderr /
  jvmlog.
  

Problem conclusion

• The JCICS code has been updated to not log the error in this
  scenario.
  

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:

  UI91984

Modules/Macros

• DFJ@H356
  

Fix information

• Fixed component name

  CICS TS Z/OS V6

• Fixed component ID

  5655YA100

Applicable component levels

• R400 PSY UI91984

     UP23/05/27 P F305