PM30980: Clearmake erroneously reporting 'interference from another process'

Rational ClearCase Fix Pack (7.1.1.6) for version 7.1.1
Rational ClearCase Fix Pack (7.1.2.3) for version 7.1.2
Rational ClearCase Fix Pack 14 (7.1.2.14) for 7.1.2
Rational ClearCase Fix Pack 15 (7.1.2.15) for 7.1.2
Rational ClearCase Fix Pack 16 (7.1.2.16) for 7.1.2
Rational ClearCase Fix Pack 17 (7.1.2.17) for 7.1.2
Rational ClearCase Fix Pack 18 (7.1.2.18) for 7.1.2
Rational ClearCase Fix Pack 19 (7.1.2.19) for 7.1.2

APAR status

• Closed as program error.

Error description

• Clearmake may erroneously report 'interference from another
  process' errors when a multiple build scripts, from multiple
  simultaneously started non-parallel builds, are spawning large
  numbers of short-lived child processes.
  
  This currently appears to require a system where dozens -- if
  not hundreds -- of users are using the system in addition to
  cron-scheduled builds.
  

Local fix

Problem summary

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  * USERS AFFECTED:                                              *
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  * PROBLEM DESCRIPTION:                                         *
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  * RECOMMENDATION:                                              *
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  When clearmake builds are running, the MVFS filesystem
  maintains process-specific data for each process running as
  part of the build environment. On busy systems, where large
  numbers of processes are running and therefore process ids
  are being recycled very quickly, it was possible that stale
  process data could be found and used.  Clearmake would
  detect the stale data in the audit files and issue the
  "interference from another process" error.
  

Problem conclusion

• Fixed in 7.1.1.6 and 7.1.2.3
  

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

  CLEARCASE UNIX

• Fixed component ID

  5724G2901

Applicable component levels

• R711 PSN

     UP