PM35193: PEV RECOVERY CAUSES THREAD AND MQ CONNECTION LEAK

Fixes are available

APAR status

Closed as program error.

Error description

A connection leak is observed during recovery which may
eventually result in MQ reason code 2025
(MQRC_MAX_CONNS_LIMIT_REACHED).

SYMPTOMS:
A dump can show:
* Many of these types of threads can be seen running:
com/ibm/ws/sib/remote/mq/impl/TransactionalWorker.getNextWorkIte
m
* these threads are created to allow all work to execute under
one
transactional connection to a QManager on the same thread
* the adjunct java heap has a lot (>6K) objects of type:
com/ibm/ws/sib/remote/mq/exceptions/RMQCursorException
--
with detailed message as:
--
CWSJP0023E: A Websphere MQ error was encountered when using the
Websphere MQ queue Q1
on the Websphere MQ queue manager Name :QMGR, Host :hostname,
Port
:0000,
Channel :CHANNEL, Bus :BUS, BM Name
:###,
BM Uuid :###, Virtual QM Name :BUS,
Auth alias :###, Transport :OutboundBasicWMQClient: null
--

Local fix

```
N/A
```

Problem summary

****************************************************************
* USERS AFFECTED:  All users of MQ servers for IBM WebSphere   *
*                  Application Server V7.0 connecting to an    *
*                  MQ queue manager in BINDINGS mode.          *
****************************************************************
* PROBLEM DESCRIPTION: MQRC_MAX_CONNS_LIMIT_REACHED is         *
*                      observed during transaction recovery    *
*                      processing for an MQ servers resource.  *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
During recovery processing of transactional resources
associated with MQ servers, connections may not properly be
cleaned up once recovery processing has completed.

Problem conclusion

The code has been altered to ensure that the connection opened
for transaction recovery is always properly closed when
transaction recovery has completed for that resource.

APAR PM35193 is currently targeted for inclusion in Service
Level (Fix Pack) 7.0.0.19 of WebSphere Application Server V7.0.

Please refer to URL:
//www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
for Fix Pack availability.

Temporary fix

Comments

APAR Information

APAR number
PM35193
Reported component name
WEBSPHERE FOR Z
Reported component ID
5655I3500
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-03-18
Closed date
2011-05-24
Last modified date
2011-10-04

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

Fix information

Fixed component name
WEBSPHERE FOR Z
Fixed component ID
5655I3500

Applicable component levels

R700 PSY UK71280
UP11/09/10 P F109

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.

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
27 October 2021

Tips

PM35193: PEV RECOVERY CAUSES THREAD AND MQ CONNECTION LEAK

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

R700 PSY UK71280

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.

Document Information

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