JR45767: COMPILATIONS OF TWO JOBS DO NOT COMPLETE ON A PARTICULAR SITUATION.

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APAR status

  • Closed as program error.

Error description

  • There are two large jobs. Each job completes a compilation when
    each job complies separately.
    Compilations for both jobs do not complete when uvsh processes
    to compile each job are launched on AIX box at almost the same
    time.
    This seems to occur when both jobs share so files for parallel
    routines.
    
    It appears that the two DSD.CompileJob processes are blocking,
    waiting for a recordlock on a shared library file while holding
    a recordlock on a different shared library file.
    

Local fix

Problem summary

  • Simultaneous compilation of parallel jobs, which use overlapping
     sets of parallel routines, may deadlock
      Compilation process opens and temporarily locks dependent
    libraries in order
      to check the last modified timestamp. If more than one compile
    that references
      the same set of libraries is running at the same time this can
    lead to deadlock.
    

Problem conclusion

  • Fixed code to transparently recover from deadlock.
    

Temporary fix

Comments

APAR Information

  • APAR number

    JR45767

  • Reported component name

    WIS DATASTAGE

  • Reported component ID

    5724Q36DS

  • Reported release

    870

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-02-19

  • Closed date

    2013-03-15

  • Last modified date

    2013-03-15

  • 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

    WIS DATASTAGE

  • Fixed component ID

    5724Q36DS

Applicable component levels

  • R870 PSY

       UP



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Document information


More support for:

InfoSphere DataStage

Software version:

8.7

Reference #:

JR45767

Modified date:

2013-03-15

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