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MQSeries.net Forum IndexGeneral IBM MQ SupportSender channel in retrying mode without reason

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matth
PostPosted: Wed Jan 31, 2018 10:13 am Post subject: Sender channel in retrying mode without reason Reply with quote

Novice

Joined: 13 Feb 2007
Posts: 19
Location: Brazil

Hi:

I have an MQSeries (8.0.0.5) runining on Windows machine. I had some issue with one sender channel which entered in retrying mode. In log files, there is no reason, but shows an attempt to start it, as below:

-------------------------------------------------------
1/30/2018 11:57:00 - Process(8968.1) User(MUSR_MQADMIN) Program(amqrcmla.exe)
Host(A) Installation(Installation1)
VRMF(8.0.0.5) QMgr(QM.A)

AMQ9514: Channel 'CA.TO.B' is in use.

EXPLANATION:
The requested operation failed because channel 'CA.TO.B' is
currently active.
ACTION:
Either end the channel manually, or wait for it to close, and retry the
operation.

These attempts to start werent made by user request, due there is not Start command attempts on log file.

After some minutes, channel has become to Running state without intervention.

Unfortunately, I dont have acess to Queue Manager on B side or any log files on this side.
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bruce2359
PostPosted: Wed Jan 31, 2018 10:52 am Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 8077
Location: US: west coast, almost. Otherwise, enroute.

A channel will retry for a variety of reasons, and will continue to retry according to the retry attributes of the channel. What info in the error log precedes the entry you posted?
_________________
I would tell you a UDP joke, but you might not get it.
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matth
PostPosted: Fri Feb 09, 2018 5:48 am Post subject: Reply with quote

Novice

Joined: 13 Feb 2007
Posts: 19
Location: Brazil

bruce2359 wrote:
A channel will retry for a variety of reasons, and will continue to retry according to the retry attributes of the channel. What info in the error log precedes the entry you posted?


Ok. A side said that he tried some "start" options, with no success, but log didnt register any root-cause to channel becomes in Retrying State.

On B side, customer said that all channels (receiver) were in Running state (which I believe to be impossible).

Att,
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bruce2359
PostPosted: Fri Feb 09, 2018 6:20 am Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 8077
Location: US: west coast, almost. Otherwise, enroute.

Reasonably clear from the log that AMQ9514: Channel 'CA.TO.B' is in use.

Gather some information:
On both A and B, issue the MQSC DISPLAY CHSTATUS(CA.TO.B) COMMAND. Post results here - not the 'he said' kind.

Stop both ends of the channel, with MODE(FORCE), if necessary. From the non-started SDR channel issue the MQSC PING CHL(channelname) command. Again, post results here.
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matth
PostPosted: Fri Feb 09, 2018 8:15 am Post subject: Reply with quote

Novice

Joined: 13 Feb 2007
Posts: 19
Location: Brazil

bruce2359 wrote:
Reasonably clear from the log that AMQ9514: Channel 'CA.TO.B' is in use.

Gather some information:
On both A and B, issue the MQSC DISPLAY CHSTATUS(CA.TO.B) COMMAND. Post results here - not the 'he said' kind.

Stop both ends of the channel, with MODE(FORCE), if necessary. From the non-started SDR channel issue the MQSC PING CHL(channelname) command. Again, post results here.


This was an temporary situation, which I couldnt replicate. I just wanted to understand this one. I only have access to A side data and logs. On this one, I had no information about retrying status, but receved an PrintScreen of MQExplorer which proves Retrying stante of channel.

Att,
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bruce2359
PostPosted: Fri Feb 09, 2018 9:02 am Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 8077
Location: US: west coast, almost. Otherwise, enroute.

Read up on problem determination with mq channels here: http://www-01.ibm.com/support/docview.wss?uid=swg21620770

Retry state means that the channel retry software is waiting for the current retry interval (wait) to expire.

Is this a frequent occurrence? Occasional? Rare?

Next time, issue the STOP CHANNEL(CA.TO.B) command. When the channel goes to STOPPED state, issue the MQSC PING CHANNEL(CA.TO.B) command. Post the results here.

I'm pre-configured to be suspicious of the folks at the receiver end of of a channel in retry. But that's just me.
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