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MQSeries.net Forum IndexGeneral IBM MQ SupportWhat are these queues named AMQ.*

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belchman
PostPosted: Tue Sep 25, 2018 6:09 am Post subject: What are these queues named AMQ.* Reply with quote

Partisan

Joined: 31 Mar 2006
Posts: 318
Location: Ohio, USA

I have this queue manager that has many queues named like AMQ.* that seem to all be PERMDYN queues.

Does anyone have any clue where they came from? How do I get rid of them? There are so many, MQ Explorer is slow trying to present them.

I have already deleted all qmodels named like SYSTEM.* and bounced the queue manager multiple times.

Here is a randomly picked queue.

dis QUEUE(AMQ.5BAA2560224C9E17)
Quote:
1 : dis QUEUE(AMQ.5BAA2560224C9E17)
AMQ8409: Display Queue details.
QUEUE(AMQ.5BAA2560224C9E17) TYPE(QLOCAL)
ACCTQ(QMGR) ALTDATE(2018-09-25)
ALTTIME(09.12.19) BOQNAME( )
BOTHRESH(0) CLUSNL( )
CLUSTER( ) CLCHNAME( )
CLWLPRTY(0) CLWLRANK(0)
CLWLUSEQ(LOCAL) CRDATE(2018-09-25)
CRTIME(09.12.19) CURDEPTH(0)
CUSTOM( ) DEFBIND(OPEN)
DEFPRTY(0) DEFPSIST(NO)
DEFPRESP(SYNC) DEFREADA(NO)
DEFSOPT(SHARED) DEFTYPE(PERMDYN)
DESCR(Model for managed queues for durable subscriptions)
DISTL(NO) GET(ENABLED)
HARDENBO IMGRCOVQ(QMGR)
INITQ( ) IPPROCS(0)
MAXDEPTH(999999999) MAXMSGL(4194304)
MONQ(QMGR) MSGDLVSQ(PRIORITY)
NOTRIGGER NPMCLASS(NORMAL)
OPPROCS(0) PROCESS( )
PUT(ENABLED) PROPCTL(COMPAT)
QDEPTHHI(80) QDEPTHLO(20)
QDPHIEV(DISABLED) QDPLOEV(DISABLED)
QDPMAXEV(ENABLED) QSVCIEV(NONE)
QSVCINT(999999999) RETINTVL(999999999)
SCOPE(QMGR) SHARE
STATQ(QMGR) TRIGDATA( )
TRIGDPTH(1) TRIGMPRI(0)
TRIGTYPE(FIRST) USAGE(NORMAL)



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bruce2359
PostPosted: Tue Sep 25, 2018 7:08 am Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 8158
Location: US: west coast, almost. Otherwise, enroute.

These are queues created in-flight by applications MQOPENing a QModel definition, and usually for use as a reply-to queue. If the app does not specify a naming rule for the dynamic queue, then AMQ.* will be used. The 5BAA2560224C9E17 you see gives the queue a unique name.

Apps creating permanent dynamic queues should also close and delete them when the app ends.

You will need to identify the offending app(s). Look to mqs app activity trace facility.

Many IT shops require apps use a naming rule that includes the app name, like PAYROLL53.* or PAYROLL53.TIMECARD.REPLIES.*. Many shops create a security rule that prevents apps from using AMQ.*, to prevent the issue you are addressing.
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hughson
PostPosted: Wed Sep 26, 2018 3:02 am Post subject: Re: What are these queues named AMQ.* Reply with quote

Sentinel

Joined: 09 May 2013
Posts: 815
Location: Bay of Plenty, New Zealand

belchman wrote:
I have this queue manager that has many queues named like AMQ.* that seem to all be PERMDYN queues.

Does anyone have any clue where they came from? How do I get rid of them? There are so many, MQ Explorer is slow trying to present them.

I have already deleted all qmodels named like SYSTEM.* and bounced the queue manager multiple times.

Here is a randomly picked queue.

Code:
 dis QUEUE(AMQ.5BAA2560224C9E17)
    1 : dis QUEUE(AMQ.5BAA2560224C9E17)
AMQ8409: Display Queue details.
   QUEUE(AMQ.5BAA2560224C9E17)             TYPE(QLOCAL)
   DEFSOPT(SHARED)                         DEFTYPE(PERMDYN)
   DESCR(Model for managed queues for durable subscriptions)

These PERMDYN queues appear to have been created using the QMODEL that is for managed subscriptions, the SYSTEM.DURABLE.MODEL.QUEUE, but they are not managed subscription queues because those would have a name, SYSTEM.MANAGED.DURABLE.*

Rather than deleting the MODEL queues, I suggest you lock down access to them?

Agree with Bruce, that Activity Trace can help to trace the offender.

Cheers,
Morag
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