PI54370: NEED TO ISSUE A SERIALIZED CLOSE OF THE PAL VSAM CLUSTER IF A CANCEL COMMAND IS ISSUED.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When a CANCEL of the IIDR CDC for z/OS address space is issued,
  the task that should CLOSE the PAL VSAM cluster is terminated,
  leaving the VSAM cluster open.  Then VSAM services engage and
  perform the CLOSE, but without using the serialization required
  for a FailOver environment.  This can cause corruption of the
  VSAM cluster if another instance is concurrently writing to it.
   An ESTAE TERM=YES user exit is required to intercept operator
  cancellations (and other forced outages) and issue the CLOSE
  using the required serialization.
  

Local fix

• No local fix is available.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of the FailOver feature of IIDR CDC    *
  *                 for z/OS.                                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: In a FailOver environment, if the IIDR  *
  *                      CDC for z/OS Active instance is         *
  *                      cancelled, the PAL VSAM cluster will be *
  *                      closed by VSAM recovery routines.  The  *
  *                      required serialization will not occur,  *
  *                      and so there is potential for           *
  *                      corruption of the linking structures in *
  *                      the VSAM cluster if the Hot-Standby     *
  *                      instance writes to the same cluster     *
  *                      concurrently with it being closed.      *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  
  Potential for corruption of the PAL VSAM cluster exists if the
  IIDR CDC for z/OS address space is cancelled in a FailOver
  environment.
  

Problem conclusion

• A z/OS Resource Manager routine has been put in place to
  serialize and close the VSAM cluster, and the SHAREOPTIONS of
  the VSAM data set have been changed to (2,3).
  

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:

  UI35149 UI35150 UI35151

Modules/Macros

• CHCATHDL CHCATHSW CHCCLKIT CHCDFPAL CHCOSCIQ
  CHCOSCPF CHCPALIQ CHCPALIT CHCPALOG CHCPALPF
  

Fix information

• Fixed component name

  INFO SRVR CDC Z

• Fixed component ID

  5655U7600

Applicable component levels

• RA20 PSY UI35149

     UP16/02/21 P F602

• RA21 PSY UI35151

     UP16/02/21 P F602

• R650 PSY UI35150

     UP16/02/21 P F602

Fix is available

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