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MQSeries.net Forum Index » IBM MQ Java / JMS » JMS with CCDT and SSL hangs

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lawrencem
PostPosted: Tue Nov 06, 2012 1:28 am    Post subject: JMS with CCDT and SSL hangs Reply with quote

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Joined: 06 Nov 2012
Posts: 2
We have a twin site setup with MQ 7.0.1.3 and a gateway queue manager on each site on AIX. We are connecting to the gateway queue manager from weblogic 10.3.5 via JMS and a CCDT that is weighted so that it is always pinned to the gateway queue manager on its own site unless it is down and then will go to the other.

The weighting might be irrelevant in the problem we are seeing as we are forcing all our messages down one site. We have SSL on the channels (NULL_SHA).

We have a program that loops sending a message via JMS/CCDT one at a time and after just 100-120 messages the thread hangs. If we add a second delay between sending message all is fine (not possible for production as messages will be coming from MDB at a very high volume).

MQ gets a TCP/IP error that indicates a problem making a TCP/IP connection. If we monitor the TCP/IP connections when we have the delay they go from wait to established and back again but with out the delay they soon all get stuck in established.

The stuck thread has in its stack trace startHandshake so we removed the SSL from the channel and flys through with no problems so it seems our problem is JMS to CCDT with SSL. If JMS is reconfigured to point to a local queue manager using SSL all is fine also so looks like the CCDT is playing a part.

We have datapower devices that write to same gateway queue managers using a queue manager group using SSL and they do not hit same problem.

Any ideas ? Any help greatly appreciated as we are currently stuck.

Lawrence
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zpat
PostPosted: Tue Nov 06, 2012 3:23 am    Post subject: Reply with quote

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Joined: 19 May 2001
Posts: 5866
Location: UK
My advice would be take a MQ trace on the queue manager (reproduce the problem during the trace) and open a PMR with IBM to get it analysed.

Also a MQ trace on the client side might be useful (to IBM).

You could try applying fixpack 7.0.1.9 (on the client side first) and see if it still happens.
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lawrencem
PostPosted: Tue Nov 06, 2012 6:47 am    Post subject: Reply with quote

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Joined: 06 Nov 2012
Posts: 2
Thanks for quick response, taken a look at all the fix packs since 7.0.1.3 and nothing that jumped out regarding CCDT.

Getting close to our go live so we are close to removing CCDT and writing back to local queue manager without CCDT which seems to perform fine with SSL. Won't have time fro the PMR route so unless someone has a miracle idea think that is unfortunately route will have to tak.
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zpat
PostPosted: Tue Nov 06, 2012 6:57 am    Post subject: Reply with quote

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Joined: 19 May 2001
Posts: 5866
Location: UK
The CCDT just supplies some connection information.

I would apply the fixpack and re-test anyway. In any case this might be what IBM support centre will suggest as 7.0.1.3 is really quite old now.
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fjb_saper
PostPosted: Tue Nov 06, 2012 6:27 pm    Post subject: Reply with quote

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Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
7.0.1.3 ??? I would not touch JMS unless you're at 7.0.1.5 or above!
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