IBM Support

IT23730: CDSA SUSPEND QUEUE PROCESSING STALLS WHEN THERE ARE OVER 1000 SUSPENDED SESSIONS

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APAR status

  • Closed as program error.

Error description

  • CDSA suspend queue processing appears to stall when there are
    over 1000 suspended sessions.
    

Local fix

Problem summary

  • Users Affected:
    All
    
    Problem Description:
    In burst scenarios where 1000s of BPs are attempting (at
    virtually the same time) to transmit a file from a CDSA (PNODE)
    to a remote node (SNODE) which is severely restricted to less
    than 5 concurrent sesssions, suspend queue processing appears to
    "stall" becuase of the pace at which the queued entries are
    resumed.
    
    Platforms Affected:
    Unix/Linux
    Windows
    iSeries
    

Problem conclusion

  • Resolution Summary:
    
    A code fix is provided.
    Depending on session limit restrictions, burst scenarios can
    significantly increase the SHSL suspend queue depth.  Prior to
    the fix, the deeper the queue became, the slower its processing
    became.   After the fix, queue depth has virtually no impact on
    queue processing; performance is significantly improved,
    especially in burst scenarios.
    
    Delivered In:
    5020500_18
    5020601_10
    5020602_6
    5020603_6
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT23730

  • Reported component name

    STR B2B INTEGRA

  • Reported component ID

    5725D0600

  • Reported release

    525

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-01-12

  • Closed date

    2018-01-17

  • Last modified date

    2018-07-15

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

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

Fix information

  • Fixed component name

    STR B2B INTEGRA

  • Fixed component ID

    5725D0600

Applicable component levels

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS3JSW","label":"IBM Sterling B2B Integrator"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"5.2.5","Edition":"","Line of Business":{"code":"LOB02","label":"AI Applications"}}]

Document Information

Modified date:
15 July 2018