IC70155: ONSPACES GIVES INCORRECT WARNING: $INFORMIXDIR/ETC/$ONCONFIG CAN NOT BE ACCESSED IF CPU AFFINITY SET TO INVALID RANGE OF CPU'S

APAR status

• Closed as program error.

Error description

• When running onspaces to add a dbspace, the command will fail to
  create the dbspace and incorrectly warn that
  $INFORMIXDIR/etc/$ONCONFIG can not be accessed when run in an
  environment where the CPU affinity of the VPCLASS onconfig
  parameter has been set to specify an invalid range of CPUs.
  
  For example on a 2 CPU system, if VPCLASS is set to affinitize
  on CPUs 1-3  (where CPUs 2 and 3 do not exist), onspaces will
  report the following message:
  
  Verifying physical disk space, please wait ...
  WARNING: Cannot access configuration file
  $INFORMIXDIR/etc/$ONCONFIG.
  Cannot build a new Space.
  
  This message is misleading, and can not lead directly to proper
  resolution or identification of the root cause of the failure to
  create the dbspace.
  
  By comparison, the online.log does correctly report a message
  that identifies the problem, by displaying a message of:
  
  21:27:44  VPCLASS 'cpu' not enough physical procs for affinity
  
  When VPCLASS is updated to either disable affinity, or to set
  affinity to a valid range of physical CPUs to match the
  available hardware, the online.log message and onspaces warning
  no longer appear, and onspaces will successfully create the new
  space.
  

Local fix

• Disable CPU affinity for VPCLASS in the onconfig, or correct the
  range of CPU's associated with the VPCLASS aff parameter.
  A change to the VPCLASS will require an instance restart.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users of onspaces utility, which have affinity set in        *
  * onconfig                                                     *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * When affinity in onconfig is set to an incorrect value       *
  * (non-existent CPU), onspaces can't add dbspace.              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to IDS 11.50.xC9.                                    *
  ****************************************************************
  

Problem conclusion

• We make unnecessary reads of the onconfig during execution of
  onspaces which prevents adding of dbspace for unrelated problems
  with ONCONFIG values.
  Fixed in IDS-11.50.FC9.
  

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:

Fix information

• Fixed component name

  IBM IDS ENTRP E

• Fixed component ID

  5724L2304

Applicable component levels

• RB15 PSY

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