PM92017: SNMP Agent terminates after EWOULDBLOCK on a TCP accept for a subagent

A fix is available

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APAR status

  • Closed as program error.

Error description

  • The SNMP Agent terminates with message EZZ6247I after five
    EWOULDBLOCK errors occurred on accept processing for TCP
    connections from subagents.  The Agent externalizes the
    following EZZ6242I message:
    .
    EZZ6242I accept function failed for a DPI inet socket; EDC8102I
    Operation would block.
    .
    The EZZ6242I message for the EWOULDBLOCK error indicates that
    the connection no longer existed when the Agent attempted to
    accept the subagent connection.  This type of error should not
    cause the Agent to terminate.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of the IBM Communications Server   *
    *                 for z/OS Version 1 Releases 12, and 13 IP:   *
    *                 SNMP Agent                                   *
    ****************************************************************
    * PROBLEM DESCRIPTION: The SNMP Agent terminates with          *
    *                      EZZ6247I message after receiving        *
    *                      five accept errors.                     *
    ****************************************************************
    * RECOMMENDATION: None                                         *
    ****************************************************************
    The SNMP Agent terminates after receiving
    five EWOULDBLOCK errors on accept processing.
    +-------------------------------------------------------------+
    + 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

  • The SNMP Agent has been changed to ignore
    EWOULDBLOCK errors on accept processing,
    so it will not terminate after receiving
    five of them.
    
    * Cross Reference between External and Internal Names
    EZASNAA3 (S_AGV123)  EZASNAA3 (S_AGV123)
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM92017

  • 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

    2013-06-27

  • Closed date

    2013-08-02

  • Last modified date

    2013-10-04

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

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

    UK96386 UK96387 PM94392

Modules/Macros

  •    EZASNAA3
    

Fix information

  • Fixed component name

    TCP/IP V3 MVS

  • Fixed component ID

    5655HAL00

Applicable component levels

  • R1C0 PSY UK96386

       UP13/09/18 P F309

  • R1D0 PSY UK96387

       UP13/09/18 P F309

Fix is available

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Document information


More support for:

z/OS family

Software version:

1C0

Operating system(s):

z/OS

Reference #:

PM92017

Modified date:

2013-10-04

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