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Message
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| shogan2003 |
 Posted: Fri Nov 03, 2006 3:40 am Post subject: Error 2010 C# MQClient messages greater than 4Mb |
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Centurion
Joined: 03 Jul 2003
Posts: 133
Location: London
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Hello
A friend of mine has written a C# application; the connection parameters are defined in an XML file
For messages > 4Mb (4.5Mb) he receives the error code 2010
Environment variable MQSERVER isn't being used and MQCHLTAB, MQCHLLIB + channel connection table file don't make any difference.
The log file size is 16Mb
He found that he can work around the problem as an interim measure if he comments out the C# methods for begin transaction and end transaction, as shown below :
Mqconnection.BeginTrans(); // *****************comment this line
try
{
// Put the file onto MQ
mqconnection.PutMessage(mi);
// Move/Delete the inbound file
if (sArchivePath == "")
{
fi.Delete();
}
else
{
fi.MoveTo(Path.GetFullPath(sArchivePath)+"\\"+fi.Name);
}
// mqconnection.CommitTrans(); //***comment this line
The begin Transaction method :
public void BeginTrans()
{
bInTransaction = true;
queueManager.Begin();
}
public void CommitTrans()
{
bInTransaction = false;
queueManager.Commit();
}
public void Rollback()
{
bInTransaction = false;
queueManager.Backout();
}
public void PutMessage(string sMessage)
{
MQMessageInformation mi = new MQMessageInformation(MQHeaderFormat.None);
mi.MessageText = sMessage;
PutMessage(mi);
}
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| zpat |
| Posted: Fri Nov 03, 2006 3:49 am Post subject: |
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Jedi Council
Joined: 19 May 2001
Posts: 5866
Location: UK
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| Increase the client channel max message length. |
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| fjb_saper |
| Posted: Fri Nov 03, 2006 3:22 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| zpat wrote: |
| Increase the client channel max message length. |
This should fix problem # 1
The next problem could be with transaction...
My guess is the log files are not defined to allow a transaction of that size... either.
See the primary and secondary logfiles and the file size (in increments of 4kB...)
Enjoy 
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| shogan2003 |
| Posted: Sat Nov 04, 2006 11:45 am Post subject: |
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Centurion
Joined: 03 Jul 2003
Posts: 133
Location: London
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We have the checked the channel size to be of 10 MB and the log size were of 16 Mbs.
We checked the size of the log file by looking into the logs of the particular queue manager.
However i am unaware of how to change the primary and secondary log file size.
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| kayou |
| Posted: Tue Dec 12, 2006 3:20 pm Post subject: |
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Novice
Joined: 05 Aug 2006
Posts: 21
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Try RUNMQSC.
It is a MQ command interpreter which is installed on the WMQ server's machine. If you do "DISPLAY GMGR" you'll see all queue manager attributes and their values. You could change them by doing "ALTER GMGR <attribute-name> (<attribute-value>). If you do not the signification of an attribute (example : CCSID), google it ; with a couple of links you'll find it out.
You can do the same mapnipulation for any MQ object you want to modify (queue, channel, ...). You can also runmqsc with an input file containing all your commands.
Have fun. |
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| fjb_saper |
| Posted: Tue Dec 12, 2006 3:35 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| shogan2003 wrote: |
We have the checked the channel size to be of 10 MB and the log size were of 16 Mbs.
We checked the size of the log file by looking into the logs of the particular queue manager.
However i am unaware of how to change the primary and secondary log file size. |
On Unix see /var/mqm/qmgrs/<qmgr>/qm.ini... You can change the number of primary and secondary log files... You cannot change the size of the logfiles without recreating the qmgr...
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| wschutz |
| Posted: Tue Dec 12, 2006 3:50 pm Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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You are using MQBEGIN (begin()) in a client environment? That doesn't work... begin isn't available in a mq client environment.....
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| kayou |
| Posted: Tue Dec 12, 2006 5:08 pm Post subject: |
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Novice
Joined: 05 Aug 2006
Posts: 21
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| 10 MB ? Think about the storage and time it takes to be processed by MQ. In a system with a little bit real-time constrains, you'd be better to put the message in a file in an FTP server, send a link to the appliaction and tell him to get the message outside of the MQ bandwith. |
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| jefflowrey |
| Posted: Tue Dec 12, 2006 5:13 pm Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| kayou wrote: |
| 10 MB ? Think about the storage and time it takes to be processed by MQ. In a system with a little bit real-time constrains, you'd be better to put the message in a file in an FTP server, send a link to the appliaction and tell him to get the message outside of the MQ bandwith. |
That's silly.
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| kayou |
| Posted: Tue Dec 12, 2006 5:38 pm Post subject: |
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Novice
Joined: 05 Aug 2006
Posts: 21
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Jefflowrey,
My english is very limited. Could you tell me what you mean by the word "silly" ? |
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| jefflowrey |
| Posted: Tue Dec 12, 2006 5:49 pm Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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MQ is perfectly capable of handling 10mb messages.
It will have some performance impact, but it can be managed easily.
MQ is a significantly better transport for all kinds of enterprise data movement than FTP.
It is better to use MQ than to use FTP.
On the other hand, it is better to make your MQ messages as small as possible.
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| kayou |
| Posted: Tue Dec 12, 2006 6:48 pm Post subject: |
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Novice
Joined: 05 Aug 2006
Posts: 21
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| jefflowrey wrote: |
| MQ is perfectly capable of handling 10mb messages. |
I new that.
| jefflowrey wrote: |
| It will have some performance impact, but it can be managed easily. |
Sure ! The performance impact is the reason why I sent a reply.
| jefflowrey wrote: |
MQ is a significantly better transport for all kinds of enterprise data movement than FTP. It is better to use MQ than to use FTP.
|
I 100% disagree with that.
MQ is the de facto standard of MOMs (Message Oriented Middleware) very suitable for making autonomous applications to communicate (and NOT TO SHARE DATA) ; in a real time or mission critical business, it is very recommended to have very short messages. A MOM is not a File TILE TRANSFER PROTOCOL. A MOM is not a DATABASE.
| jefflowrey wrote: |
| On the other hand, it is better to make your MQ messages as small as possible. |
If you can not make them small ???
Intelligent answer : You may use good old tools like the old and helpful FTP. Instead of sending the data in the message, you send a pointer (link) in data. The application could get the content of the message (by FTP) without using MQ processing resources.
Example : Your MQ messages content is structured XML. In your XML, you can have the tag or attribute "FTP" for large size messages, instead of the content of the message. |
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| wschutz |
| Posted: Tue Dec 12, 2006 7:02 pm Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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Interesting debate, but nothing to do with the original post.
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| fjb_saper |
| Posted: Wed Dec 13, 2006 4:35 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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And to come back to the original post:
To go over 4MB he needs a client definition for the channel ... i.e. use of the channel Tables ...
Don't remember if the newest .NET version gives him support for that...
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| Vitor |
| Posted: Wed Dec 13, 2006 4:58 am Post subject: |
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