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| Problem with QueueReceiver.receive |
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| olekg |
 Posted: Fri Jun 03, 2005 12:55 am Post subject: Problem with QueueReceiver.receive |
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Newbie
Joined: 04 May 2005
Posts: 8
Location: Poznan, Poland
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Hello,
I am using Java JMS classes to connect to WebSphere MQ from standalone Java client program.
We face a problem of very long time waiting to receive a message form the Queue.
The
msg = receiver.receive(timeout);
takes more than 10 seconds to obtain a message that is in the queue.
How can I debug Java JMS classes and MQ Manager to see what is actually happening.
I will note that there is no traffic on MQ, there are only single test messages. Also the messages are not long - about n* kB.
Any help and suggestions will be appreciated.
sincerely Olek
We use WebSphere MQ 5.3 on HP-UX and clients on Windows.
Poznan, Poland |
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| bower5932 |
| Posted: Fri Jun 03, 2005 5:48 am Post subject: |
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Jedi Knight
Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
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Don't post multiple times.... In case the moderator decides to delete your other append...
You could start by running a jms trace against your program to see if it shows anything. There are details in the Using Java manual. You could also look into the errors subdirectories to see if there are any errors that might account for delays. |
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| fjb_saper |
| Posted: Fri Jun 03, 2005 10:08 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Olek,
I know how you feel. I've had the same kind of thing happen to me from Win2k java client to the MainFrame.
Check out Support Pack MO71/MO72.
They should be able to give you something working a little bit faster.
The main culprit is probably your network.
Try running your client from a different point in the network and see if this speeds things up.
Try as well running it on the same machine as your MQ server and see if as a client connection you still have difficulties or if it is all of a sudden sooo .... much faster. (XWindows for HP connection ??)
Enjoy  |
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| PeterPotkay |
| Posted: Sat Jun 04, 2005 5:57 am Post subject: Re: Problem with QueueReceiver.receive |
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Poobah
Joined: 15 May 2001
Posts: 7722
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| olekg wrote: |
Also the messages are not long - about n* kB.
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Olek, how big is n*kb?
From the client machine, open a command prompt, set the MQSERVER variable to point to your QM, and try using the amqsbcgc sample program to browse the message. If that comes back very fast, you know its your java app. If it comes back slow, you can focus on the network or the server side.
_________________
Peter Potkay
Keep Calm and MQ On |
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| fjb_saper |
| Posted: Sat Jun 04, 2005 12:55 pm Post subject: Re: Problem with QueueReceiver.receive |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| PeterPotkay wrote: |
From the client machine, open a command prompt, set the MQSERVER variable to point to your QM, and try using the amqsbcgc sample program to browse the message. If that comes back very fast, you know its your java app. If it comes back slow, you can focus on the network or the server side. |
I would be a little bit more discriminate (Experience ?)
Different protocols travel at different speeds over the network.
This is one of the reasons to let the java client app do the client connection on the server itself and display back to your pc via XTerm or one of its clones.
So if you have the same troubles using a client connection and a bindings connection it is definitely your code.
If a client connection slows it down by a very big factor when on the same machine as the server get the help of the sysadmin of the machine. There might be something up with the TCP/IP set up of the machine.
Probably first trying one stuff and on timeout succeeding with the alternate path....
Now if on the same machine the client connection is fast but not from your PC it is definitely the network....
Enjoy  |
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