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MQSeries.net Forum IndexGeneral IBM MQ SupportMeaning of different SubState in SVRCONN channel

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pcelari
PostPosted: Thu Sep 12, 2019 10:02 am Post subject: Meaning of different SubState in SVRCONN channel Reply with quote

Partisan

Joined: 31 Mar 2006
Posts: 364
Location: New York

Greetings!

I see our SVRCONN channel instances in three different substates:
"MQI Call", "In MQPUT", "Receiving".

Can someone explain what they really mean and the difference? Isn't "Receiving" the same as "In MQPUT"? i.e. When a client makes MQPUT, the channel receives the message and puts into the queue"?

I have yet to find a document detailing this attribute.

thanks much for sharing your insight!
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gbaddeley
PostPosted: Thu Sep 12, 2019 5:07 pm Post subject: Reply with quote

Jedi

Joined: 25 Mar 2003
Posts: 2037
Location: Melbourne, Australia

MQ Client channels basically provide MQI calls over the network. At the SVRCONN side, the MCA will be doing various things to service the MQI calls and other MQ Client protocol packets. The sub-states will reflect this to a certain extent.
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hughson
PostPosted: Thu Sep 12, 2019 6:23 pm Post subject: Reply with quote

Grand Master

Joined: 09 May 2013
Posts: 1281
Location: Bay of Plenty, New Zealand

These SUBSTATE values show what the channel in question is currently doing.

So for example, SUBSTATE(RECEIVE) means that the channel is currently sitting in a TCP/IP receive() call.

SUBSTATE(MQPUT) means the channel is currently doing an MQPUT to a target queue - having received some data off the TCP/IP socket that told it to do a put.

So, no, SUBSTATE(RECEIVE) and SUBSTATE(MQPUT) are not the same thing, but two distinct operations that the channel will do when the client does an MQPUT. It, as you say, receives it and then puts it onto the queue.

The IBM Knowledge Center documents this attribute in the following places:-Cheers,
Morag
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pcelari
PostPosted: Fri Sep 13, 2019 6:28 am Post subject: Reply with quote

Partisan

Joined: 31 Mar 2006
Posts: 364
Location: New York

Thank you Morag for the concise explanation!

Quote:
These SUBSTATE values show what the channel in question is currently doing.



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