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MQSeries.net Forum Index » Workflow Engines - IBM MQ Workflow & Business Process Choreographer » Doubt on Process Instance

Doubt on Process Instance

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mqseries123

Posted: Wed Jan 18, 2006 12:26 am Post subject: Doubt on Process Instance

Apprentice

Joined: 04 Jan 2006
Posts: 26

Say I have a process instance that is currently active. If the system crashes does all the process instances terminate. Can I not resart it from the point of failure?

hos

Posted: Wed Jan 18, 2006 12:52 am Post subject:

Chevalier

Joined: 03 Feb 2002
Posts: 470

Hi,

1. what do you mean by system crash? If a MQWF server crashes this is a
fatal product error that needs to be analyzed. If your program
implementation crashes this is bussiness as usual in terms of workflow:
your workitem goes into state InError and you can restart it.

2. MQWF is a transactional system that keeps all state information in the
database. No information will be lost even if the system should crash.
There is no automatic termination of process instances when MQWF
servers terminate (be it planned or by error).

I suggest you read the MQWF Concepts and Architecture book to become more familiar with the design concepts of MQWF.

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