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IV61761: AIX NFSV4 CLIENT GOES INTO ENDLESS LOOP DUE TO FHEXPIRED ERROR APPLIES TO AIX 7100-03

A fix is available

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APAR status

  • Closed as program error.

Error description

  • AIX NFSv4 client with z/OS as the NFSv4 server.
    When the NFSv4 server returns NFS4ERR_FHEXPIRED error the
    AIX client could get in to an endless loop trying to
    recover from the FHEXPIRED error. Customer will see the
    n4bg threads taking up CPU on the AIX system, and could
    also see performance problems on the z/OS server, due to
    the heavy traffic from the AIX client.
    This is similar to the problem already fixed in IV45625,
    but
    the code path is now in COMMIT calls versus WRITE calls.
    

Local fix

Problem summary

  • AIX NFSV4 CLIENT GOES INTO ENDLESS LOOP DUE TO FHEXPIRED ERROR
    

Problem conclusion

  • NFS4ERR_FHEXPIRED eror code is handled to avoid a endless loop.
    

Temporary fix

Comments

  • 6100-08 - use AIX APAR IV58072
    6100-09 - use AIX APAR IV61751
    6100-09 - use AIX APAR IV61751
    7100-02 - use AIX APAR IV64191
    7100-03 - use AIX APAR IV61761
    7100-04 - use AIX APAR IV61769
    

APAR Information

  • APAR number

    IV61761

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-06-20

  • Closed date

    2014-06-20

  • Last modified date

    2016-05-11

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

    IV58072

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

Fix information

  • Fixed component name

    AIX V7.1

  • Fixed component ID

    5765H4000

Applicable component levels

  • R710 PSY U862118

       UP14/10/29 I 1000

PTF to Fileset Mapping

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Document Information

Modified date:
11 May 2016