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PH65510: REMOVING COMMUNICATION TCP/IP PARAMETER "FASTRELEASE" FROM CHCCMMXX CONFIGURATION CONTROL DATA SET

A fix is available

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APAR status

  • Closed as program error.

Error description

  • The parameter "FASTRELEASE" is a TCP/IP sub-parameter available
    in the CHCCMMXX configuration control data set.
    This sub-parameter and its associated functionalities will be
    removed as it is a deprecated functionality.
    

Local fix

  • No local fix is available
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of IIDR CDC for z/OS.              *
    ****************************************************************
    * PROBLEM DESCRIPTION: In certain scenarios a subscription may *
    *                      attempt to take over idle communication *
    *                      links that are pending termination.     *
    ****************************************************************
    When FASTRELEASE is set to NO, communication links may remain
    idle up to 10 minutes. If a new subscription takes over the
    idle link during this period, it may cause mis-assigned
    connections and invalid negotiation sequences.
    

Problem conclusion

  • The configuration parameter FASTRELEASE is decommissioned and
    communication links will now attempt to terminate under
    10 seconds of the subscription ending.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PH65510

  • Reported component name

    INFO SRVR CDC Z

  • Reported component ID

    5655U7600

  • Reported release

    A21

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2025-03-04

  • Closed date

    2026-03-18

  • Last modified date

    2026-04-02

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

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

    UO07184

Modules/Macros

  • CHCCITTC CHCMKMON CHCMKMVS CHCPAAUT
    

Fix information

  • Fixed component name

    INFO SRVR CDC Z

  • Fixed component ID

    5655U7600

Applicable component levels

  • RA21 PSY UO07184

       UP26/03/31 P F603

Fix is available

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Document Information

Modified date:
02 April 2026