IV27584: SYSTEM CRASH IN E_CLEAR_WAIT(). APPLIES TO AIX 7100-01

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• System crash due to unpinned eventlist in e_clear_wait().
  
  (0)> f
  pvthread+000200 STACK:
  [00054514]e_clear_wait+0000F0 (0000000000000005,
  0000000000000000 [??])
  [0006417C]clock+0001AC (??)
  [000EB054]i_softmod+0002A8 ()
  [00177D30].finish_interrupt+000024 ()
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:
  * Systems running the 7100-01 Technology Level with
  * bos.mp64 below the 7.1.1.19 level.
  ****************************************************************
  * PROBLEM DESCRIPTION:
  * System crash due to unpinned eventlist in e_clear_wait().
  * The problem can occur when applications are using timed
  * ipc operations and the system is low on memory.
  * The crash will have a stack trace similar to:
  * (0)> f
  * pvthread+000200 STACK:
  *  00054514 e_clear_wait+0000F0 (0000000000000005,
  * 0000000000000000  ?? )
  *  0006417C clock+0001AC (??)
  *  000EB054 i_softmod+0002A8 ()
  *  00177D30 .finish_interrupt+000024 ()
  ****************************************************************
  * RECOMMENDATION:
  * Install APAR IV27584.
  * Prior to fix availability, an interim fix is available from
  * ftp://public.dhe.ibm.com/aix/ifixes/iv27584/
  ****************************************************************
  

Problem conclusion

• When we detect that we are issuing a timed operation on a
  semaphore or message queue, we pin the waitlist anchors, and
  then keep them pinned until the ipc object is deleted.
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

• 6100-06 - use AIX APAR IZ94647
  6100-07 - use AIX APAR IV13404
  6100-08 - use AIX APAR IV14309
  7100-00 - use AIX APAR IV42334
  7100-01 - use AIX APAR IV27584
  7100-02 - use AIX APAR IV42324
  

APAR Information

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

  IZ34176

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

Fix information

• Fixed component name

  AIX V7.1

• Fixed component ID

  5765H4000

Applicable component levels

• R710 PSY U855903

     UP13/07/30 I 1000

PTF to Fileset Mapping

• U855903 bos.mp64 7.1.1.19