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

Obtain the fix for this APAR.

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 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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