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MQSeries.net Forum Index » General IBM MQ Support » Best solutions to replay messages

Best solutions to replay messages

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nickkirk

Posted: Fri Sep 26, 2008 2:01 am Post subject: Best solutions to replay messages

Apprentice

Joined: 26 Sep 2008
Posts: 48

I am busy designing and implementing a WMB solution for a client.
I am trying to work out the best solution to replay messages that have failed.

I know of the following 3 solutions :

1) Use a queue for failed messages and have the support team take the messages off the queue with rfhutil and resend them. Using rfhutil would cause the message id for the replayed message to change

2) Use a database. Have a script replay the messages from the database. The message id of the replayed message could stay the same.

3) Write a small MQ app to take the messages off the 'failed' queue and resend them with the same message ID.

What is the best solution. Are there other solutions than those listed above ?

Nick Kirk

zpat

Posted: Fri Sep 26, 2008 2:26 am Post subject:

Jedi Council

Joined: 19 May 2001
Posts: 5866
Location: UK

RFHUTILC can remove a message from a queue, write it to a file, read it back from the file and put on a queue with the same msgid as the original message.

Just select "set all context" in the main tab of RFHUTILC. Deselect "new msg id" Works fine.

However applications should not normally be dependent on the msgid value as this is not good practice.

nickkirk

Posted: Fri Sep 26, 2008 2:34 am Post subject:

Apprentice

Joined: 26 Sep 2008
Posts: 48

Thanks zpat.

The reason why using the same msgId is important is for the following reason :

An error handling subflow sends an email detailing the failed message to the support staff.
If the resubmitted message fails again using a different msgId, this could be very confusing. The support staff may believe that several different messages have failed when actually only the one did.

I am considering the database option actually.

Advantages:

-A persistent store will allow analysis on the failed messages.
-No user errors as the extraction/resubmission process is automated with scripts
-Will be more secure (i.e. users can't change the data prior to resubmitting a message).

Disadvantages:

-Resource (if many failed messages).
-Provision of scripts to do the data extraction and resubmission of failed messages.

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