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IV64670: UNMOUNT OF AUTOMOUNT FILESYSTEMS OR STOPWPAR CAN HANG IN WPAR APPLIES TO AIX 7100-03

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • On AIX systems with WPARs, where the WPARs are setup for
    automount, unmount of the autofs mount points or even the
    stopwpar command could hang.
    The dump from the time of the problem shows an aump
    thread
    stuck in:
    
    (0)> f 583
    pvthread+024700 STACK:
    [001051A0]e_block_thread+000280 ()
    [004F1244]sosbwait+0003C4 (??, ??)
    [0054A36C]soereceive+00146C (??, ??, ??, ??, ??, ??, ??)
    [00570790]soreceive+000010 (??, ??, ??, ??, ??, ??)
    [00014F50].kernel_add_gate_cstack+000030 ()
    [062444E0]clntkudp_callit+000BE0 (F1000A00E0EA4628,
    0000000000000000,
       0000000006299BD8, 0000000000000000, 0000000006299BD8,
    0000000000000000,
       0000000000000002, 0000000000000000)
    [F1000000C054F3A4]auto_calldaemon+000204 (??, ??, ??, ??,
    ??, ??, ??, ??)
    [F1000000C054BBF8]auto_null_request+000078 (??, ??, ??)
    [F1000000C0549960]unmount_tree+000260 ()
    [00014D70].hkey_legacy_gate+00004C ()
    [00267D08]threadentry+000088 (??, ??, ??, ??)
    [kdb_read_mem] no real storage @ FFFFFFFFFFF8D40
    
    And the dump will also show that there is no automountd
    daemon running on the WPAR.
    Only a reboot of the global system will help recover from
    this WPAR being in hung state.
    

Local fix

  • None. Global system needs to be rebooted to recover from
    the WPAR hang.
    

Problem summary

  • When WPARs are setup for automount, unmount of the autofs mount
    points or even the stopwpar command could hang after automount
    daemon is stopped.
    

Problem conclusion

  • Handle automount exit as needed.
    

Temporary fix

Comments

  • 7100-03 - use AIX APAR IV64670
    

APAR Information

  • APAR number

    IV64670

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-09-08

  • Closed date

    2014-10-09

  • Last modified date

    2015-12-31

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

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

    IV65755 IV65764

Fix information

  • Fixed component name

    AIX V7.1

  • Fixed component ID

    5765H4000

Applicable component levels

  • R710 PSY U865826

       UP15/05/19 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Enterprise Edition

Software version: 710

Operating system(s): AIX

Reference #: IV64670

Modified date: 31 December 2015