PM81547: ABEND4C5 IN EZBTTCCC (HIP61D0 11.090)+0011A6 RSN=77F82A00

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Customer is running with CHECKCLIENTCONN 5,5. During this
    process an abend4C5 occurs due to an invalid hash table.
    

Local fix

  • Remove CHECKCLIENTCONN from the Telnet Server profile. Then
    issue an Obeyfile command to rebuild the profile.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of the IBM Communications Server   *
    *                 for z/OS Version 1 Releases 13 IP:  Telnet   *
    *                 Services using CheckClientConn               *
    ****************************************************************
    * PROBLEM DESCRIPTION: ABEND4C5 in EZBTTCCC when using         *
    *                      CheckClientConn                         *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The problem may be summarized as followed:
    1. CheckClientConn is coded in the Telnet profile with
       small value specified for the maximum number of
       connections to be checked.
    2. There are more connections using the same IP address
       than the value specified on CheckClientConn.
    3. A new connection is established with the same IP address,
       thus driving the CheckClientConn logic to send timemarks.
    4. The number of outstanding timemarks already exceeds the
       value specified on CheckClientConn, so no more are sent at
       this time.  The ABEND4C5 in EZBTTCCC occurs when trying to
       free a reference, on a hash table, that was never obtained.
    +-------------------------------------------------------------+
    + Please check our Communications Server for OS/390 homepages +
    + for common networking tips and fixes.  The URL for these    +
    + homepages can be found in Informational APAR II11334.       +
    +-------------------------------------------------------------+
    

Problem conclusion

  • EZBTTCCC is updated to issue the HashTab FindComp only
    if it has already issued the HashTab FindAll.  Also,
    ConnToken is now cleared when HashTab FindComp is issued.
    Also, EZBTTCCC is updated to ensure that it does not send
    more timemarks, in one dispatch, than specified on
    CheckClientConn.
    
    * Cross Reference between External and Internal Names
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM81547

  • Reported component name

    TCP/IP V3 MVS

  • Reported component ID

    5655HAL00

  • Reported release

    1D0

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-01-28

  • Closed date

    2013-02-08

  • Last modified date

    2013-12-27

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

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

    UK91513 PI08747

Modules/Macros

  •    EZBTTCCC
    

Fix information

  • Fixed component name

    TCP/IP V3 MVS

  • Fixed component ID

    5655HAL00

Applicable component levels

  • R1D0 PSY UK91513

       UP13/03/26 P F303

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.



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Document information


More support for:

z/OS family

Software version:

1D0

Operating system(s):

z/OS

Reference #:

PM81547

Modified date:

2013-12-27

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