PI47562: SPURIOUS QUEUE CONSTRAINED MESSAGES BEING ISSUED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• .
  When TRMD is enabled, TCP queue constraint messages may be
  issued for various connections even though there is not an
  actual processing problem.  The messages (EZZ8662I for Receive
  queue or EZZ8664I for Send queue) will list DataAge as the
  trigger and report an unreasonably large dataage value.  These
  will be accompanied by constraint exit messages (EZZ8663I and
  EZZ8665I, respectively) with the same correlator number.
  

Local fix

• Either:
  
   - Create an IDS Attack policy for attach type TCP_QUEUE_SIZE
     (or modify any existing one) to disable reporting these
     messages.
  
   - Ignore these messages.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All users of the IBM Communications Server for z/OS Version  *
  * 2 Release 2 IP                                               *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * Data age on TCP connections is not managed correctly,        *
  * resulting in msgEZZ8662I and msgEZZ8664I being incorrectly   *
  * issued when TRMD is active.                                  *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply PTF                                                    *
  ****************************************************************
  The age of data queued to a TCP connections send or receive
  queues is not managed correctly.  The data age displayed in
  Netstat ALL/-A may be incorrect.  When TRMD is active,
  msgEZZ8662I indicating the receive queue is constrained, or
  msgEZZ8664I indicating the send queue is contrained may be
  issued when the queues are not constrained.  The process to
  propogate the data age when data is read by the application or
  sent over the network uses an incorrect location for the
  original age of the data.
  

Problem conclusion

• The process for propogating the data age on the send and receive
  queues has been amended to use the correct location for the
  original data age.
  

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:

  PI49465 UI32704 UI32709 UI32711

Modules/Macros

• EZBTCUTL EZBTCMR  EZBT6FWR EZBTCFWR EZBT6LWR EZBTLFWR EZBTCFRD
  EZBTCRD
  

Fix information

• Fixed component name

  TCP/IP V3 MVS

• Fixed component ID

  5655HAL00

Applicable component levels

• R220 PSY UI32704

     UP15/12/15 P F512

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.