PK23023: DRF HUNG UP AFTER I/O ERROR OF IC DATASET ON TAPE VOLUME.

APAR status

• Closed as program error.

Error description

• - DRF started for 15 DEDB AREAs with READNUM(3,10) and
  TAPECHK(Y) specified.
   - 15 subordinated address spaces (DRFS0001-DRFS0015) started.
   - When DRFS0007 was reading IC on tape volume, we issued 'V
  8EC,OFFLINE, command for the tape unit. An I/O error on the tape
  drive occured and DRFS0007 terminated.
  - After that, DRFS0011-DRFS0015 and DRF MASTER hung up.
  Additional symptom: Hang condition between Master and
  Subordinate address space may occur if tape device is not
  available and then becomes available. This APAR correct the
  failure to post the controlling module when the tape device is
  freed up.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All IMS Database Recovery Facility Version 2 *
  *                 Release 1 users who manage image copy data   *
  *                 sets on tape volumes.                        *
  ****************************************************************
  * PROBLEM DESCRIPTION: DRF may result in a hang condition      *
  *                      after an I/O error of a image copy      *
  *                      data set occured on a tape volume.      *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  DRF will perform Early End of Recovery processing if an error
  occurs in a recovery subordinate address space and ERROR(STOP)
  is specified.  When restoring image copy data sets from tape,
  DRF manages tape device usage among the recovery subordinate
  address spaces.  Sometimes a subordinate address space will be
  set in a BPEWAIT state until a tape device becomes available.
  During Early End of Recovery processing, DRF failed to POST
  these waiting address spaces to terminate early.
  

Problem conclusion

• AIDS: RIDS/UTIL RIDS/DBS DBS/UTIL
    DEP: NONE
    GEN:
  
  *** END IMS KEYWORDS ***
  FRXMSTR1 is changed to post FRXIDYN0 to stop waiting during
  Early End of Recovery processing.
  
  FRXIDYN0 is changed to only perform tape request processing
  when the RVGB_TAPECHK flag is turned on by the user.
  

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:

  UK14390

Modules/Macros

• FRXEDRF0 FRXEPSS0 FRXIDYN0 FRXMSTR1 FRXRVIC
  FRXVWSP
  

Fix information

• Fixed component name

  IMS DB RECOVERY

• Fixed component ID

  5655I4400

Applicable component levels

• R210 PSY UK14390

     UP06/05/18 P F605