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IV04387: APPLICATIONS HANG WAITING FOR CONSOLE IN _CSQ_ACQUIRE APPLIES TO AIX 5300-11

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Applications may hang waiting for console access.
    Even new telnet, ssh sessions etc may not work.
    However applications not using streams will continue to
    work.
    It is not a complete system hang but applications
    requiring console access will hang.
    
    Different threads in the dump or kdb will show the below
    stack:
    
    pvthread+1805600 STACK:
    [00054AA4]e_block_thread+000278 ()
    [041AE498]_csq_acquire+000148 (??, ??)
    [041ADB74]mult_sqh_acquire+0000AC (??)
    [041B7BCC]osr_add_modules+00025C (??)
    [041B8ADC]pse_open+00056C (??, ??, ??, ??)
    [003F5380]devcopen+00033C (??, ??, ??, ??, ??)
    [003F4CE0]rdevopen+000094 (??, ??, ??, ??, ??)
    [0052C628]cdev_open+000054 (F100010045AF20E8,
    0000000300000003,
       0000000000000000)
    [004CBE00]spec_open@AF69_29+00016C (??, ??, ??, ??, ??,
     ??)
    [00408C88]vnop_open+0000E8 (??, ??, ??, ??, ??)
    [0044AE98]openpnp+0002FC (??, ??, ??, ??, ??)
    [0044B350]openpath+0000BC (??, ??, ??, ??, ??, ??, ??)
    [0044B60C]copen+0001F4 (??, ??, ??, ??, ??)
    [0044AB38]open+00001C (??, ??, ??)
    [00003810].svc_instr+000110 ()
    [kdb_get_memory] no real storage @ 2FF1E0D0
    [1000A82C]1000A82C ()
    

Local fix

Problem summary

  • Applications may hang waiting for console access.
    Even new telnet, ssh sessions etc may not work.
    However applications not using streams will continue to
    work.
    It is not a complete system hang but applications
    requiring console access will hang.
    
    Different threads in the dump or kdb will show the below
    stack:
    
    pvthread+1805600 STACK:
     00054AA4 e_block_thread+000278 ()
     041AE498 _csq_acquire+000148 (??, ??)
     041ADB74 mult_sqh_acquire+0000AC (??)
     041B7BCC osr_add_modules+00025C (??)
     041B8ADC pse_open+00056C (??, ??, ??, ??)
     003F5380 devcopen+00033C (??, ??, ??, ??, ??)
     003F4CE0 rdevopen+000094 (??, ??, ??, ??, ??)
     0052C628 cdev_open+000054 (F100010045AF20E8,
    0000000300000003,
    0000000000000000)
     004CBE00 spec_open@AF69_29+00016C (??, ??, ??, ??, ??,
    ??)
     00408C88 vnop_open+0000E8 (??, ??, ??, ??, ??)
     0044AE98 openpnp+0002FC (??, ??, ??, ??, ??)
     0044B350 openpath+0000BC (??, ??, ??, ??, ??, ??, ??)
     0044B60C copen+0001F4 (??, ??, ??, ??, ??)
     0044AB38 open+00001C (??, ??, ??)
     00003810 .svc_instr+000110 ()
     kdb_get_memory  no real storage @ 2FF1E0D0
     1000A82C 1000A82C ()
    

Problem conclusion

  • code changes done to fix hang
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV04387

  • Reported component name

    AIX 5.3

  • Reported component ID

    5765G0300

  • Reported release

    530

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2011-08-03

  • Closed date

    2011-08-03

  • Last modified date

    2013-04-07

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

    IV00542

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

Fix information

  • Fixed component name

    AIX 5.3

  • Fixed component ID

    5765G0300

Applicable component levels

  • R530 PSY U844886

       UP11/10/07 I 1000

PTF to Fileset Mapping

[{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11P","label":"APARs - AIX 5.3 environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"530","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
07 April 2013