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MQSeries.net Forum Index » Workflow Engines - IBM MQ Workflow & Business Process Choreographer » Maximum Connections (RC=2025)

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kevinf2349
PostPosted: Tue Mar 11, 2003 8:46 am    Post subject: Maximum Connections (RC=2025) Reply with quote

Grand Master

Joined: 28 Feb 2003
Posts: 1311
Location: USA
Hi all

Does anyone know how Workflow connects to MQ on z/OS?

We are getting an MQ RC of 2025 (Max connections reached) when we try to replay messages on the EXE HOLDQ. A recycle of the workflow address spaces hasn't fixed this and we are planning to recycle both the Workflow address spaces and the MQ address spaces as this may fix the problem (it has in the past).

My question really is:

Does Workflow connect to MQ series using one connection per address space or one connection per user connected to the workflow system? Currently we have a client (NT) machine that 'concentrates' all traffic down to the mainframe through a full function queue manager on NT.

We are nowhere near having all the connections used up on the mainframe and MQ is working fine there.

Anyone seen this before?...if so...what was the resolution? I search of the IBM problem database came up empty.
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emileke
PostPosted: Mon Mar 24, 2003 5:55 am    Post subject: Reply with quote

Centurion

Joined: 19 Aug 2001
Posts: 110
Location: South Africa
The MQCONN or MQCONNX call was rejected because the maximum number of concurrent connections has been exceeded.

On z/OS, connection limits are applicable only to TSO and batch requests. The limits are determined by the customer using the following parameters of the CSQ6SYSP macro:
For TSO: IDFORE
For batch: IDBACK

For more information, see the WebSphere MQ for z/OS System Setup Guide.
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Emile M Kearns
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kevinf2349
PostPosted: Mon Mar 24, 2003 6:08 am    Post subject: Reply with quote

Grand Master

Joined: 28 Feb 2003
Posts: 1311
Location: USA
Emileke

Thank you for your response. I realise what the error is telling me and I know that increasing the maximum connections won't help. (we tried it and we still got the same error). We only occasionally get the error. We have a maximum connections set at 256 and we are using only about 40 under normal circumstances. My question still remains...

Does Workflow connect to MQ series using one connection per address space or one connection per user connected to the workflow system? Currently we have a client (NT) machine that 'concentrates' all traffic down to the mainframe through a full function queue manager on NT.
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