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MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » Message flow hang, no error

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MVO
PostPosted: Mon May 10, 2004 12:56 pm    Post subject: Message flow hang, no error Reply with quote

Centurion

Joined: 09 Sep 2001
Posts: 131

Hi,

We're running WMQI 2.1 CSD06 on Solaris.

This afternoon, 2 of the message flows hang i.e. messages queued up in the broker's local queues but did not get processed. I found no error in any of the log. We have 8 DFEs and a total of 17 message flows. The server has 8GBs of memory. There was no indication of memory shortage. The hang message flows are on 2 different DFEs.

When I ran mqsireload command on one DFE, messages were being processed again.

Any idea ?

Thanks
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JT
PostPosted: Tue May 11, 2004 6:13 am    Post subject: Reply with quote

Padawan

Joined: 27 Mar 2003
Posts: 1564
Location: Hartford, CT.

MVO,

Did you check for errors in /var/adm/messages? At the time of the hang, did the message flows' input queues have an IPPROCS count?
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MVO
PostPosted: Tue May 11, 2004 6:25 am    Post subject: Reply with quote

Centurion

Joined: 09 Sep 2001
Posts: 131

Yes, that was the first thing I checked.
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JT
PostPosted: Tue May 11, 2004 6:40 am    Post subject: Reply with quote

Padawan

Joined: 27 Mar 2003
Posts: 1564
Location: Hartford, CT.

Was the DFE using CPU cycles? Had a similar experience with a non-responding message flow that was using 50% of the cpu. A re-deploy of the code resolved the problem. Was unable to identify the exact cause of the loop.
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