PM74952: ABENDS4C5/74620402 IN EZBUDWRT

A fix is available

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APAR status

  • Closed as program error.

Error description

  • When a RIP packet is sent out over an OSA interface, the
    rtpusecount is incremented twice, by two consecutive RTPREF
    BEGIN_REF invocations, but then decremented once, by an RTPREF
    END_REF invocation.  The net result is that the rtpusecount
    keeps growing, until it eventually causes the rtpusecount field
    to go negative, triggering the ABEND4C5 dump.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of the IBM Communication Server    *
    *                 for z/OS Version 1 Release 12 and 13 IP      *
    ****************************************************************
    * PROBLEM DESCRIPTION: ABEND 4C5 Reason 7462040 when a route   *
    *                      reference count passes 16777215.        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Whenever the MSG_DONTROUTE flag is specified on a Send, Sendto,
    or Sendmsg socket call, an extra increment is made to the
    associated routing control block reference count. When the
    reference count exceeds 16777215 TCPIP will abend with code
    4C5 Reason 7462040. These type of socket calls are typically
    used by routing applications such as OMPROUTE or diagnostic
    tools that allow the specification of an interface such as PING.
    +-------------------------------------------------------------+
    + 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

  • TCPIP has been modified to correctly increment and decrement
    the routing control block reference count.
    
    * Cross Reference between External and Internal Names
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM74952

  • Reported component name

    TCP/IP V3 MVS

  • Reported component ID

    5655HAL00

  • Reported release

    1C0

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-10-12

  • Closed date

    2012-11-09

  • Last modified date

    2013-01-02

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

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

    UK83399 UK83400

Modules/Macros

  • EZBRWWRI EZBRWWR1 EZBUDWRT EZBUDWR1 TORUWP
    TOUUWP
    

Fix information

  • Fixed component name

    TCP/IP V3 MVS

  • Fixed component ID

    5655HAL00

Applicable component levels

  • R1C0 PSY UK83399

       UP12/12/22 P F212

  • R1D0 PSY UK83400

       UP12/12/22 P F212

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:

1C0

Operating system(s):

z/OS

Reference #:

PM74952

Modified date:

2013-01-02

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