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IV47690: AIX NFS4 CLNT CAUSES PERF ISSUE WITH Z/OS DUE TO FHEXPIRED ERR 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.
    

Local fix

  • None. Reboot AIX client to overcome the error.
    

Problem summary

  • Performance issues on the z/OS nfsv4 server and
    high cpu usage on the AIX nfsv4 client
    

Problem conclusion

  • Propagate the NFS4ERR_ACCES error back to caller nfs4write()
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV47690

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2013-08-29

  • Closed date

    2013-08-29

  • Last modified date

    2014-02-14

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

    IV45625

  • 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 U853812

       UP13/11/22 I 1000

PTF to Fileset Mapping

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Document Information

Modified date:
14 February 2014