OA64560: LOG STREAM DATA SET NOT DELETED (MSGIXG284I) DUE TO SYSDSN ENQ HELD BY LONG RUNNING BROWSE SESSION

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A SYSDSN ENQ is held whenever a browse session is started.
  The ENQ protects data from going away while the browse
  session (IXGBRWSE) is active.  It also prevents a particular
  log stream data set from being deleted if the browse cursor is
  currently positioned on that particular data set.  For long
  running browse sessions that simply read data from oldest to
  youngest, it may cause the SYSDSN ENQ to be held even
  though the browse cursor is nowhere near the data set with the
  ENQ.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users of HBB77C0 and above releases                          *
  * using System Logger Services.                                *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * Long running browse (IXGBRWSE)                               *
  * session results in IXG284I message                           *
  * due to SYSDSN ENQ held against a                             *
  * log stream data set.                                         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When a browse session is started and its read cursor falls on
  data that resides in a log stream data set, a SYSDSN ENQ is
  held to ensure the data set does not get deleted.  For long
  running browse sessions that simply read data from oldest to
  youngest, this may result in the SYSDSN ENQ being held even
  when the read cursor no longer points to the associated data
  set.  This happens when the read cursor points beyond the
  log stream data set and points to data that is in interim
  storage.
  

Problem conclusion

• System Logger is changed to release the SYSDSN ENQ when
  the read cursor transitions from data on DASD to data in
  interim storage.
  
  Additional Searchable keywords:
     SYSPLEXDS
  

Temporary fix

Comments

• ×**** PE24/04/11 FIX IN ERROR. SEE APAR OA66388  FOR DESCRIPTION
  ×**** PE24/04/11 FIX IN ERROR. SEE APAR OA66388  FOR DESCRIPTION
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UJ94285 UJ94286 UJ94287

Modules/Macros

• IXGA1RED IXGF2BRW
  

Fix information

• Fixed component name

  SYSTEM LOGGER

• Fixed component ID

  5752SCLOG

Applicable component levels

• R7D0 PSY UJ94287

     UP23/12/27 P F312 ¢

• R7E0 PSY UJ94285

     UP23/12/27 P F312 ¢

• R7C0 PSY UJ94286

     UP23/12/27 P F312 ¢

Fix is available

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