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MQSeries.net Forum IndexIBM MQ Installation/Configuration SupportSVRCONN channels not stopped permanently after qmgr restart

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jthm
PostPosted: Mon May 16, 2022 4:17 am Post subject: SVRCONN channels not stopped permanently after qmgr restart Reply with quote

Newbie

Joined: 04 Apr 2005
Posts: 7

Currently working with MQ v9.1.0.10 I notice a behaviour of the QMGR, which is not consistent I would say.

I have a SVRCONN channel which I stop in my QMGR.

Code:
STOP CHANNEL(MQAPPS.CL)
     2 : STOP CHANNEL(MQAPPS.CL)
AMQ9533W: Channel 'MQAPPS.CL' is not currently active.
DISPLAY CHSTATUS(*) ALL
     3 : DISPLAY CHSTATUS(*) ALL
AMQ8417I: Display Channel Status details.
   CHANNEL(MQAPPS.CL)                      CHLTYPE(SVRCONN)
   BUFSRCVD(0)                             BUFSSENT(0)
   BYTSRCVD(0)                             BYTSSENT(0)
   CHSTADA(2022-05-16)                     CHSTATI(13.43.20)
   COMPHDR(NONE,NONE)                      COMPMSG(NONE,NONE)
   COMPRATE(0,0)                           COMPTIME(0,0)
   CONNAME( )                              CURRENT
   EXITTIME(0,0)                           HBINT(300)
   JOBNAME(0000000000000000)               LOCLADDR( )
   LSTMSGDA( )                             LSTMSGTI( )
   MCASTAT(NOT RUNNING)                    MCAUSER( )
   MONCHL(OFF)                             MSGS(0)
   RAPPLTAG( )                             SECPROT(NONE)
   SSLCERTI( )                             SSLKEYDA( )
   SSLKEYTI( )                             SSLPEER( )
   SSLRKEYS(0)                             STATUS(STOPPED)
   STOPREQ(NO)                             SUBSTATE( )
   CURSHCNV(0)                             MAXSHCNV(0)
   RVERSION( )                             RPRODUCT( )



Then I try to connect from a client.

Code:
/opt/mqm/samp/bin/amqsputc LQ EDC5
Sample AMQSPUT0 start
MQCONN ended with reason code 2537


I get an error message as expected

Code:
mqrc 2537

      2537  0x000009e9  MQRC_CHANNEL_NOT_AVAILABLE




Then I stop the QMGR and start it again.

I check for the channel status.

Code:
DISPLAY CHSTATUS(*) ALL
     1 : DISPLAY CHSTATUS(*) ALL
AMQ8417I: Display Channel Status details.
   CHANNEL(MQAPPS.CL)                      CHLTYPE(SVRCONN)
   BUFSRCVD(0)                             BUFSSENT(0)
   BYTSRCVD(0)                             BYTSSENT(0)
   CHSTADA( )                              CHSTATI( )
   COMPHDR(NONE,NONE)                      COMPMSG(NONE,NONE)
   COMPRATE(0,0)                           COMPTIME(0,0)
   CONNAME( )                              CURRENT
   EXITTIME(0,0)                           HBINT(300)
   JOBNAME(0000000000000000)               LOCLADDR( )
   LSTMSGDA( )                             LSTMSGTI( )
   MCASTAT(NOT RUNNING)                    MCAUSER( )
   MONCHL(OFF)                             MSGS(0)
   RAPPLTAG( )                             SECPROT(NONE)
   SSLCERTI( )                             SSLKEYDA( )
   SSLKEYTI( )                             SSLPEER( )
   SSLRKEYS(0)                             STATUS(STOPPED)
   STOPREQ(NO)                             SUBSTATE( )
   CURSHCNV(0)                             MAXSHCNV(0)
   RVERSION( )                             RPRODUCT( )



It looks the same way like before the restart.

I try to connect with the client.

Code:
/opt/mqm/samp/bin/amqsputc LQ EDC5
Sample AMQSPUT0 start
target queue is LQ
aaa
bbb



I can connect and put messages. The channel status is now.

Code:
DISPLAY CHSTATUS(*) ALL
     2 : DISPLAY CHSTATUS(*) ALL
AMQ8417I: Display Channel Status details.
   CHANNEL(MQAPPS.CL)                      CHLTYPE(SVRCONN)
   BUFSRCVD(0)                             BUFSSENT(0)
   BYTSRCVD(0)                             BYTSSENT(0)
   CHSTADA( )                              CHSTATI( )
   COMPHDR(NONE,NONE)                      COMPMSG(NONE,NONE)
   COMPRATE(0,0)                           COMPTIME(0,0)
   CONNAME( )                              CURRENT
   EXITTIME(0,0)                           HBINT(300)
   JOBNAME(0000000000000000)               LOCLADDR( )
   LSTMSGDA( )                             LSTMSGTI( )
   MCASTAT(NOT RUNNING)                    MCAUSER( )
   MONCHL(OFF)                             MSGS(0)
   RAPPLTAG( )                             SECPROT(NONE)
   SSLCERTI( )                             SSLKEYDA( )
   SSLKEYTI( )                             SSLPEER( )
   SSLRKEYS(0)                             STATUS(STOPPED)
   STOPREQ(NO)                             SUBSTATE( )
   CURSHCNV(0)                             MAXSHCNV(0)
   RVERSION( )                             RPRODUCT( )
AMQ8417I: Display Channel Status details.
   CHANNEL(MQAPPS.CL)                      CHLTYPE(SVRCONN)
   BUFSRCVD(7)                             BUFSSENT(6)
   BYTSRCVD(2540)                          BYTSSENT(2332)
   CHSTADA(2022-05-16)                     CHSTATI(13.49.03)
   COMPHDR(NONE,NONE)                      COMPMSG(NONE,NONE)
   COMPRATE(0,0)                           COMPTIME(0,0)
   CONNAME(192.168.174.21)                 CURRENT
   EXITTIME(0,0)                           HBINT(300)
   JOBNAME(00009FAC00000004)           
   LOCLADDR(::ffff:192.168.174.125(2222))
   LSTMSGDA(2022-05-16)                    LSTMSGTI(13.49.07)
   MCASTAT(RUNNING)                        MCAUSER(mqapp01)
   MONCHL(OFF)                             MSGS(4)
   RAPPLTAG(amqsputc)                      SECPROT(NONE)
   SSLCERTI( )                             SSLKEYDA( )
   SSLKEYTI( )                             SSLPEER( )
   SSLRKEYS(0)                             STATUS(RUNNING)
   STOPREQ(NO)                             SUBSTATE(RECEIVE)
   CURSHCNV(1)                             MAXSHCNV(10)
   RVERSION(07050004)                      RPRODUCT(MQCC)



So the channel is still "stopped". but now there is an additional instance, which is in state "running".

This is not the behaviour I would expect or like. I would expect the behaviour is not changed by a restart.

But does it works as designed like that?

What is the benefit of this kind of behaviour?
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gbaddeley
PostPosted: Mon May 16, 2022 3:38 pm Post subject: Reply with quote

Jedi

Joined: 25 Mar 2003
Posts: 2348
Location: Melbourne, Australia

Hi,
Is your queue manager at MQ version prior to 8.0 ?

https://www.ibm.com/docs/en/ibm-mq/9.2?topic=function-restarting-stopped-channels has a caveat:
Quote:
If the queue manager stops while a channel is in RETRYING or STOPPED status, the channel status is remembered when the queue manager is restarted. From IBM MQ 8.0 onwards, this applies to SVRCONN channels as well. Previously, the channel status for the SVRCONN channel type was reset if the channel initiator stopped while the channel was in STOPPED status.


If it is some other issue, you may not be able to raise a Service Request with IBM for an unsupported version.
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Glenn
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jthm
PostPosted: Tue May 17, 2022 12:10 am Post subject: Reply with quote

Newbie

Joined: 04 Apr 2005
Posts: 7

Hi,

thank you for your response.

As I wrote at the beginning. The queue manager is/was on version 9.1.0.10. Now it is on version 9.1.0.11. With this version the behavior remains the same.

I use a client version of v8.0.0.4. But this should not matter, because we talk about a behavior of the queue manager, when it is restarting.

I found also the link you provided, but the behavior is like I describe. It looks like a bug, doesn't it?
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fjb_saper
PostPosted: Tue May 17, 2022 12:56 pm Post subject: Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20569
Location: LI,NY

jthm wrote:
Hi,

thank you for your response.

As I wrote at the beginning. The queue manager is/was on version 9.1.0.10. Now it is on version 9.1.0.11. With this version the behavior remains the same.

I use a client version of v8.0.0.4. But this should not matter, because we talk about a behavior of the queue manager, when it is restarting.

I found also the link you provided, but the behavior is like I describe. It looks like a bug, doesn't it?


Works in 9.2.0.3 ...
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PeterPotkay
PostPosted: Thu May 26, 2022 5:31 pm Post subject: Reply with quote

Poobah

Joined: 15 May 2001
Posts: 7706

jthm,
I noticed this as well last year. It was on some old MQ 8 queue managers just about to go away, and it worked as expected when I tried on our 9.2 queue managers so I never followed up. I just assumed yet another good reason to get these v8 QMGRs shut down.

It sure seems like a bug, but maybe one fixed in 9.2?
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Peter Potkay
Keep Calm and MQ On
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hughson
PostPosted: Thu May 26, 2022 8:43 pm Post subject: Reply with quote

Padawan

Joined: 09 May 2013
Posts: 1757
Location: Bay of Plenty, New Zealand

jthm wrote:
It looks like a bug, doesn't it?

Agreed. If you have not already raised a case with IBM, do so.
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Morag Hughson @MoragHughson
IBM MQ Technical Education Specialist
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jthm
PostPosted: Tue Jun 14, 2022 6:16 am Post subject: Reply with quote

Newbie

Joined: 04 Apr 2005
Posts: 7

Thank you for your responses.

I asked the customer to open a case.
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