PK81848: SIB MESSAGING ENGINE FAILS TO START WITH MESSAGE CWSIS0002E SHOWING A JAVA.LANG.ARRAYINDEXOUTOFBOUNDSEXCEPTION

Fixes are available

APAR status

Closed as program error.

Error description

After a period when the database hosting the data store for a
messaging engine was slow to respond, the messaging engine
failed to start with the following error message:
.
CWSIS0002E: The messaging engine encountered an exception
while starting.  Exception: com.ibm.websphere.sib.exception.
SIErrorException: java.lang.ArrayIndexOutOfBoundsException:0
.
Along with the error message, the application server may write
an ffdc file showing an error similar to this:
.
Exception = java.lang.ArrayIndexOutOfBoundsException
Source =
com.ibm.ws.sib.processor.impl.store.items.MessageItem.restore
probeid = 1:424:1.210.1.4
Stack Dump = java.lang.ArrayIndexOutOfBoundsException: 0  at
com.ibm.ws.sib.mfp.util.ArrayUtil.readInt(ArrayUtil.java:109)
com.ibm.ws.sib.mfp.impl.JsMessageFactoryImpl.restoreJsMessage(
com.ibm.ws.sib.processor.impl.store.items.MessageItem.restore(
...

Local fix

```
See APAR PK80871
```

Problem summary

****************************************************************
* USERS AFFECTED:  Users of the default messaging provider     *
*                  for WebSphere Application Server            *
*                  Version 6.0, Version 6.1 or Version 7.0     *
****************************************************************
* PROBLEM DESCRIPTION: After a period of slow database         *
*                      response, a messaging engine might      *
*                      fail to restart with a CWSIS0002E       *
*                      error showing a java.lang.              *
*                      ArrayIndexOutOfBoundsException          *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
When a transaction times out in a remote WebSphere Application
Server instance, or the network connection from that server is
disconnected, a rollback is issued to the Service Integration
Bus messaging engines handling any messaging performed within
the transaction.

If this rollback occurs while the messaging engine is
waiting for a connection to the database to perform
data store operations that are part of preparing the transaction
(the first phase of two-phase commit processing), the rollback
request discards important important in-memory details about
the transaction required to complete the database updates.

This causes the preparing thread to insert a row containing
a DATA_SIZE of 0, and empty data, into the SIB001 table (in
the schema associated with the messaging engine).
When the messaging engine is restarted, this row results
in the ArrayIndexOutOfBoundsException and the messaging engine
is unable to start as it considers its data store to be corrupt.

This issue is most likely to occur during a period of slow
database response, as this increases contention on the
connection pool for the JDBC data source and increases the
likelyhood of transaction timeouts (or broken connections due
to a messaging engine failing to respond to a heartbeat).

Problem conclusion

The fix for this APAR allows a rollback that is called while a
prepare for the same transaction is active to return successful
completion to the caller, without discarding the data required
by the preparing thread.
When the thread performing the prepare eventually
completes the database operations, it detects that the rollback
has occurred on another thread, completes the rollback and
throws an XAException with XA_RBROLLBACK to the caller.

The fix for this APAR is currently targeted for inclusion in
fixpack 6.0.2.37, 6.1.0.27 and 7.0.0.7.
Refer to the Recommended Updates page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

A procedure to identify and correct the corruption in the
data store is described in APAR PK80871.

Comments

APAR Information

APAR number
PK81848
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
2009-03-04
Closed date
2009-03-31
Last modified date
2009-05-21

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":"BU059","label":"IBM Software w\/o TPS"},"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:
29 December 2021

Tips

PK81848: SIB MESSAGING ENGINE FAILS TO START WITH MESSAGE CWSIS0002E SHOWING A JAVA.LANG.ARRAYINDEXOUTOFBOUNDSEXCEPTION

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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