APAR status
Closed as program error.
Error description
After upgrading a queue manager to v7 the customer saw FDCs continuously generated for a channel indicating a problem with the message length. FDCs generated showed: Probe Id :- RM575000 Component :- rstSendAsyncMessage Program Name :- amqrmppa Arith1 :- 2048 (0x800) Arith2 :- 150994944 (0x9000000) Comment1 :- Message length error MQM Function Stack ccxResponder rrxResponder ccxReceiveThreadFn cciProcessUserData cciProcessAsyncRcv rriServerAsyncRcv rstReceiveMessageRequest rstCheckForOneMessage rstSendAsyncMessage xcsFFST It was also noted when an MQ trace was started the FDCs were no longer generated.
Local fix
Customer was able to workaround the issue by setting SHARECNV(0)
Problem summary
**************************************************************** USERS AFFECTED: All users using fetching messages with get message option MQGMO_UNLOCK Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: When MQGMO_UNLOCK is specified, the datalength used in the asynchronous get within the queue manager will not be updated. This will result in an incorrect value being used, which may be larger or smaller than expected. When the value here is incorrect, an internal check fails later and the FDC with probe ID RM575000 is written. The actual MQGET being performed will not fail, and the message will be delivered.
Problem conclusion
The code has been altered to ensure that the datalength not being set when using MQGMO_UNLOCK is expected, and that it is correctly initialized before use within the internal asynchronous get call. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v7.0 7.0.1.13 v7.1 7.1.0.7 v7.5 7.5.0.6 The latest available maintenance can be obtained from 'WebSphere MQ Recommended Fixes' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037 If the maintenance level is not yet available information on its planned availability can be found in 'WebSphere MQ Planned Maintenance Release Dates' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309 ---------------------------------------------------------------
Temporary fix
Comments
APAR Information
APAR number
IV67646
Reported component name
WMQ AIX V7
Reported component ID
5724H7221
Reported release
701
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2014-12-08
Closed date
2015-01-21
Last modified date
2015-01-21
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
WMQ AIX V7
Fixed component ID
5724H7221
Applicable component levels
R701 PSY
UP
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Document Information
Modified date:
31 March 2023