DY47768: HARDWAIT FEC WHEN PROCESSING A GENERIC ASSGN STATEMENT (LIKE: ASSGN SYSXXX,DISK,VOL=CCCCCC,SHR) WITH NOTOP DISK DEVICES

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When a generic ASSGN statement is processed
  (like: ASSGN SYSxxx,DISK,VOL=cccccc,SHR)
  and one of the DISK devices is in NOT-OPERATIONAL state,
  it may happen occasionally that the VSE Supervisor SENESE task
  runs into a program check. This results in a Hardwait FEC.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: Hardwait FEC may occur with a generic   *
  *                      ASSGN statement (like // ASSGN SYSxxx,  *
  *                      DISK,VOL=ccccc,SHR) on VSE systems      *
  *                      with NOTOP disk devices attached.       *
  ****************************************************************
  * RECOMMENDATION: Install PTF.                                 *
  ****************************************************************
  With a generic ASSGN statement, the VSE System searches for the
  VOL specified in the ASSGN statement. This may trigger many
  disk I/O requests from the VSE supervisor's SRV task.
  NOTOP disk devices may cause additional I/O requests from the
  SNS task. In some situations SNS task I/O processing in IJBPVPR
  badly interferes with SRV task I/O requests and causes a
  program check in supervisor part IOINTER at label INTERTRN.
  This leads to the Hardwait FEC.
  

Problem conclusion

• IJBPVPR will now ensure that it calls INTERTRN only when an
  I/O request for the device being processed is still ongoing.
  

Temporary fix

Comments

APAR Information

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

  DY47750

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

  UD54295

Modules/Macros

• IJBPVPR
  

Fix information

• Fixed component name

  VSE/AF SVR/BAM

• Fixed component ID

  5686CF906

Applicable component levels

• R52C PSY UD54295

     UP18/04/17 I 1000

Fix is available

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