DY47772: ENDLESS LOOP IN VSE SUPERVISOR RAS ROUTINES WITH A CHANNEL CHECKAND NO LPUM IN IRB ESW

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Endless loop in VSE Supervisor RAS routines with a channel check
  and no LPUM in IRB ESW
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: When an I/O completes with a channel    *
  *                      check (subchannel-status = Channel-     *
  *                      Control check or Interface-Control      *
  *                      check) and there is no valid LPM in     *
  *                      the IRB ESW, VSE channel check          *
  *                      processing  enters an endless loop.     *
  ****************************************************************
  * RECOMMENDATION: Apply PTF.                                   *
  ****************************************************************
  When an I/O completes with a channel check (subchannel-status =
  Channel-Control check or Interface-Control check) and there is
  no  valid LPM in the IRB ESW, VSE channel check processing
  enters an endless loop. This occurs because VSE neither checks
  the LPUM validity flag nor takes an LPUM of 00 into account.
  

Problem conclusion

• VSE Channel Check processing will check the LPUM validity flag
  before it uses the LPUM for its processing. It will also now
  take an LPUM 00 into accout.
  

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:

  DY47773 DY47774 UD54303 UD54304

Modules/Macros

• $$A$SUPI MCRAS    SGSRVLVL
  

Fix information

• Fixed component name

  VSE/AF SVR/BAM

• Fixed component ID

  5686CF906

Applicable component levels

• R52C PSY UD54303

     UP18/04/24 I 1000

• R52J PSY UD54304

     UP18/04/24 I 1000

Fix is available

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