IBM Support

IV66823: TWO PROCESSES ACCESSING FILE IN /PROC CAN BOTH HANG.

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APAR status

  • Closed as program error.

Error description

  • An example scenario that can cause a hang.
    
    1) Process-1 accesses a file /proc/PID/fd/100
    
    2) Process-2 "fuser /proc/PID/fd/100" is run.
    
    This could end up hanging both these processes
    permanently.
    

Local fix

Problem summary

  • An example scenario that can cause a hang.
    
    1) Process-1 accesses a file /proc/PID/fd/100
    
    2) Process-2 "fuser /proc/PID/fd/100" is run.
    
    This could end up hanging both these processes
    permanently.
    

Problem conclusion

  • Corrected the order of locks to avoid deadlock.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV66823

  • Reported component name

    AIX 610 STD EDI

  • Reported component ID

    5765G6200

  • Reported release

    610

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-11-12

  • Closed date

    2016-02-11

  • Last modified date

    2016-02-11

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

    IV65542

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

Fix information

  • Fixed component name

    AIX 610 STD EDI

  • Fixed component ID

    5765G6200

Applicable component levels

  • R610 PSY

       UP

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Document Information

Modified date:
17 December 2021