PM15466: WEBSPHERE APPLICATION SERVER SERVICE INTEGRATION BUS MESSAGING ENGINE THROWS JMFUNINITIALIZEDACCESSEXCEPTION

Fixes are available

APAR status

Closed as program error.

Error description

WebSphere Application Server JVM hosting the Service
Integration Bus Messaging Engine throws
JMFUninitializedAccessException .

The following FFDC is produced:
Exception = com.ibm.ws.sib.mfp.jmf.JMFUninitializedAccess
Exception
Source = com.ibm.ws.sib.mfp.impl.JsMsgObject.encodeFast
probeid = jmo570
Stack Dump = com.ibm.ws.sib.mfp.jmf.JMFUninitializedAccess
Exception: guaranteedValue/set/startTick Schema: com.ibm.ws.
sib.mfp.schema.JsHdr2Schema
 at com.ibm.ws.sib.mfp.jmf.impl.JSMessageImpl.getLength
   (JSMessageImpl.java:930)
 at com.ibm.ws.sib.mfp.jmf.impl.JSMessageImpl.getEncodedLength
   (JSMessageImpl.java:843)
 at com.ibm.ws.sib.mfp.jmf.impl.JSDynamic.getEncodedLength
   (JSDynamic.java:143)
 at com.ibm.ws.sib.mfp.jmf.impl.JSField.getEncodedValue
   Length(JSField.java:185)
 at com.ibm.ws.sib.mfp.jmf.impl.JSMessageImpl.getLength
   (JSMessageImpl.java:939)
 at com.ibm.ws.sib.mfp.jmf.impl.JSMessageImpl.getEncoded
   Length(JSMessageImpl.java:843)
 at com.ibm.ws.sib.mfp.impl.JsMsgObject.encodeFast(JsMsg
   Object.java:718)
 at com.ibm.ws.sib.mfp.impl.JsMessageImpl.encodeFast(Js
   MessageImpl.java:648)
 at com.ibm.ws.sib.comms.common.CommsUtils.encodeMessage
   (CommsUtils.java:739)
 at com.ibm.ws.sib.comms.server.clientsupport.CATProxy
   Consumer.sendMessage(CATProxyConsumer.java:737)

The following error is written to the SystemOut.log during
startup of the JVM hosting the application:

CWSIV0770W: A consumer for remote destination {0} on bus
{1} for endpoint activation {2} failed with exception
com.ibm.websphere.sib.exception.SIErrorException:
CWSIC8002E: An internal error occurred. An unknown or
unexpected exception was thrown by the core API:
com.ibm.ws.sib.mfp.MessageEncodeFailedException:
com.ibm.ws.sib.mfp.jmf.JMFUninitializedAccessException:
guaranteedValue/set/startTick Schema:com.ibm.ws.sib.mfp.
schema.JsHdr2Schema .

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  Users of the default messaging provider for *
*                  IBM WebSphere Application Server Version 7.0*
****************************************************************
* PROBLEM DESCRIPTION: JMFUninitializedAccessException using   *
*                      best-effort nonpersistent               *
*                      pub/sub messages in a bus               *
*                      with multiple messaging engines         *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The JMFUninitializedAccessException exception occurs when
there is a subscriber to a topic connected to a messaging
engine as a local subscriber (but running on a remote server
connected over a network), and there are multiple messaging
engines in the bus with subscribers attached for that topic.

For best-effort nonpersistent messages the code preparing the
message for delivery to remote proxy subscriptions on other
messaging engines in the bus might run simultaneously to
serializing the message for delivery to a locally-attached
subscriber (connected over a network). Whereas for other
reliability levels, the message is prepared for delivery
to remote messaging engines synchronously, before the message
is delivered to locally attached subscribers

The two pieces of code preparing the message for delivery, and
delivering it over a network, cannot run simultaneously
against the same copy of the message, so the
JMFUninitializedAccessException exception occurs indicating
that the local-delivery thread has seen a corrupt copy of the
message (because it was being modified by the other thread).

Problem conclusion

The fix for this APAR updates the special case code used for
best-effort nonpersistent messages to take a copy of the
message before it prepares it for delivery to remote messaging
engines. This allows the code running in parallel to deliver
the message to the locally attached subscriber to run
successfully, without seeing a corrupt message.

The fix for this APAR is currently targeted for inclusion in
fix pack 7.0.0.13.  Please refer to the Recommended Updates
page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PM15466
Reported component name
PLAT MSG COM
Reported component ID
620600101
Reported release
200
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2010-05-28
Closed date
2010-08-31
Last modified date
2010-08-31

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
PLAT MSG COM
Fixed component ID
620600101

Applicable component levels

R200 PSY
UP

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.1","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
24 October 2021

Tips

PM15466: WEBSPHERE APPLICATION SERVER SERVICE INTEGRATION BUS MESSAGING ENGINE THROWS JMFUNINITIALIZEDACCESSEXCEPTION

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

R200 PSY

Document Information

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