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

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 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