PH07081: SERVICEABILITY ENHANCEMENT FOR A MISSING GROSS LOCK AFTER A LOCKESCALATION

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• Seviceability enhancement to produce a dump like a case of
  DSNIONX2:504A after a lock escalation to S state where a FETCH
  thread caused a lock escalation to S state, but IRLM did not
  hold Partition L-lock though DM control block indicated Gross
  lock was held .
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All Db2 11 and 12 for z/OS users.            *
  ****************************************************************
  * PROBLEM DESCRIPTION: This is a serviceability enhancement    *
  *                      apar to help set and reset an           *
  *                      interface flag between IRLM and Data    *
  *                      Manager.                                *
  *                                                              *
  *                                                              *
  ****************************************************************
  * RECOMMENDATION: Apply corrective PTF when available.         *
  ****************************************************************
  Before Data Manager issues a lock escalation request to
  IRLM, Data manager will turn on an interface flag and turn
  the same flag off upon IRLM lock request call return.
  IRLM will use this flag to filter out the lock escalation
  request when writing trace.
  
  This serviceability will not be enabled unless IRLM PH07085
  is also applied. Please refer to PH07085 for more details.
  

Problem conclusion

Temporary fix

Comments

• This apar delivers serviceability enhancement to indicate a
  lock escalation request in the IRLM and DM interface block.
  

APAR Information

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

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

  UI61575 UI61576

Modules/Macros

•    DSNILKDY DSNILKES
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RB10 PSY UI61576

     UP19/03/19 P F903

• RC10 PSY UI61575

     UP19/03/15 P F903

Fix is available

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