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MQSeries.net Forum IndexGeneral Discussion2035 while trying to load test using JMeter

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bruce2359
PostPosted: Fri Jun 19, 2020 5:59 am Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 8715
Location: US: west coast, almost. Otherwise, enroute.

In a couple of places, you indicated that you are testing by MQPUTting message to, and MQGETting messages from the SYSTEM.CLUSTER.TRANSMIT.QUEUE.

It is highly unusual for any application to explicitly MQOPEN a transmit queue. If MQOPENed for output, the MQPUTting application would be responsible for creating an XQH (Transmission Queue Header) to provide routing information for the receiver-side message channel agent.

If, for example, you
Code:
amqsput SYSTEM.CLUSTER.TRANSMIT.QUEUE <qmgrname>
that would explain why messages ended up in the receiver-side DLQ - no XQH was present.

I may have misunderstood what you meant. Please clarify.
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bruce2359
PostPosted: Fri Jun 19, 2020 11:45 am Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 8715
Location: US: west coast, almost. Otherwise, enroute.

Here is a post on how to interpret the DLH using amqsbcg (or amqsbcgc) https://www.mail-archive.com/mqseries@akh-wien.ac.at/msg05644.html
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yanaK
PostPosted: Sun Jun 21, 2020 10:12 pm Post subject: Reply with quote

Acolyte

Joined: 28 May 2020
Posts: 59

Thanks all.
@bruce2359 I tried to put it in another queue too.

So I setup a debugger on the OS (where MQ is) and found the code is complaining about MQ_USE_MQCSP_AUTHENTICATION being null. (which likely means the call is not even reaching MQ)

I read about it but am not sure what to set it for 7.1.

Please help.
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bruce2359
PostPosted: Mon Jun 22, 2020 3:17 am Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 8715
Location: US: west coast, almost. Otherwise, enroute.

yanaK wrote:
@bruce2359 I tried to put it in another queue too.

I don't understand what you mean by this.
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hughson
PostPosted: Mon Jun 22, 2020 4:26 am Post subject: Reply with quote

Grand Master

Joined: 09 May 2013
Posts: 1434
Location: Bay of Plenty, New Zealand

yanaK wrote:
So I setup a debugger on the OS (where MQ is) and found the code is complaining about MQ_USE_MQCSP_AUTHENTICATION being null. (which likely means the call is not even reaching MQ)

So that's a JMeter thing (most recent update in GitHub Proejct it would appear).

Code:
* **mq_use_mqcsp_authentication**: The connection authentication used. Set false for Compatibility mode, or true for MQCSP authentication.


If you're not passing in a user ID and password, then it doesn't matter one jot. MQ V7.1 does support MQCSP but ignores it unless you have an exit to do something with it. SO still doesn't matter if you are passing in a user ID and password.

Suggest you set it to false to get round the null complaint.

Cheers,
Morag
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bruce2359
PostPosted: Mon Jun 22, 2020 12:24 pm Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 8715
Location: US: west coast, almost. Otherwise, enroute.

bruce2359 wrote:
Here is a post on how to interpret the DLH using amqsbcg (or amqsbcgc) https://www.mail-archive.com/mqseries@akh-wien.ac.at/msg05644.html

Please display the Dead Letter Header. This will help determine the underlying cause of your grief.
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yanaK
PostPosted: Mon Jun 22, 2020 10:47 pm Post subject: Reply with quote

Acolyte

Joined: 28 May 2020
Posts: 59

Setting mq_use_mqcsp_authentication to false worked!

Thank you so much!

Still a couple of questions remain in my mind -

1. Why is MQ treating connection from my mac as psqr while from local OS as something else?
2. Why mq_use_mqcsp_authentication = false worked?
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hughson
PostPosted: Tue Jun 23, 2020 3:42 pm Post subject: Reply with quote

Grand Master

Joined: 09 May 2013
Posts: 1434
Location: Bay of Plenty, New Zealand

yanaK wrote:
1. Why is MQ treating connection from my mac as psqr while from local OS as something else?

There will be different assignments of identity going on depending on which machine you are coming from. It sounds like JMeter is Java, so the identity picked up to use as the client machine could be affected by setting a user id (that's something that mq_use_mqcsp_authentication = false also allows), or you could simply have different settings. You haven't showed us all the user id settings in both setups so hard to say for sure.
yanaK wrote:
2. Why mq_use_mqcsp_authentication = false worked?
Sounds like JMeter wasn't even trying the connection when you had a null value in there.

Cheers,
Morag
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yanaK
PostPosted: Tue Jun 23, 2020 4:59 pm Post subject: Reply with quote

Acolyte

Joined: 28 May 2020
Posts: 59

Code:
all the user id settings in both setups


You mean the output of ENTAUTH command for myuser id on the QMgr and the Q (vs psqr)?

Code:
Sounds like JMeter wasn't even trying the connection when you had a null value in there.


It didn't need that from my local mac
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hughson
PostPosted: Tue Jun 23, 2020 5:45 pm Post subject: Reply with quote

Grand Master

Joined: 09 May 2013
Posts: 1434
Location: Bay of Plenty, New Zealand

yanaK wrote:
Code:
all the user id settings in both setups


You mean the output of ENTAUTH command for myuser id on the QMgr and the Q (vs psqr)?


no, I mean how your user ID gets chosen. Which user you're running it under, whether you set a user in the program, if you have CHLAUTH rules, etc, etc

yanaK wrote:
Code:
Sounds like JMeter wasn't even trying the connection when you had a null value in there.


It didn't need that from my local mac
Are you using the same version of JMeter? It was the most recent update to the MQMeter plugin.

Cheers,
Morag
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Christian05
PostPosted: Sat Jun 27, 2020 2:36 pm Post subject: Reply with quote

Newbie

Joined: 27 Jun 2020
Posts: 1

bruce2359 wrote:
yanaK wrote:
@bruce2359 I tried to put it in another queue too.

I don't understand what you mean by this.


I also really don't understand what he means
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