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IV57751: AIX NFS CLNT LEAKS TCP CONN IF SERVER DOESN'T RESPOND TO MOUNT APPLIES TO AIX 7100-03

A fix is available

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APAR status

  • Closed as program error.

Error description

  • When no version is specified during the mount operation,
    AIX NFS client starts with vers=3. If there NFS server
    responds to the MOUNT NULL call, but does not reply to
    the
    NFS NULL call, then this could cause the NFS TCP
    connection
    to remain active (socket is not closed).
    
    The following command will show a lot of connections on
    reserved ports to the same NFS server. (the local IP and
    server IP remain the same)
    # netstat -an | grep 2049
    

Local fix

  • Specify vers=3 during the mount command.
    If the MOUNTVERS3 works, but NFSPROC3_NULL doesn't then
    we could still get in to the same condition, but it is
    less likely for a server to not support vers=3, as
    compared
    to vers=2.
    

Problem summary

  • NFS TCP connection remain active and leading server unresponsi
    ve over the period of time.
    

Problem conclusion

  • Memory leak of TCP client handle is fixed.
    

Temporary fix

Comments

  • 6100-07 - use AIX APAR IV58732
    6100-08 - use AIX APAR IV54660
    6100-09 - use AIX APAR IV58090
    6100-09 - use AIX APAR IV58090
    6100-09 - use AIX APAR IV58090
    7100-01 - use AIX APAR IV58251
    7100-02 - use AIX APAR IV58178
    7100-03 - use AIX APAR IV57751
    7100-04 - use AIX APAR IV58097
    

APAR Information

  • APAR number

    IV57751

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-03-27

  • Closed date

    2014-03-27

  • Last modified date

    2016-05-10

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

    IV54660

  • 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 U858991

       UP14/05/22 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Enterprise Edition

Software version: 710

Operating system(s): AIX

Reference #: IV57751

Modified date: 10 May 2016