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| SessionBean sending JMS messages |
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Message
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| wmq_guy |
 Posted: Sun Mar 06, 2005 6:56 pm Post subject: SessionBean sending JMS messages |
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Acolyte
Joined: 21 Oct 2004
Posts: 50
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using MQ5.3/WAS51
I have a Statelesss SB that puts messages on a queue queue to be sent to a remote system.
I have set the max connections to 10 on the QCF factory it is using. (will changing this soon, but I want to understand what is happening)
***
Do I need to explicitly set close the connection for the queueconnection after the sendMessage() is called even though I have the cleanup in the ejbRemove()?
I am getting a new QCF connection with each call to the sendmsg(), so I guess the container tried to create this each time and it is running out?
even though it is pulling from a pool? Do people put the createQueueConnection in the ejbCreate() instead?
here is the message:
| Quote: |
[3/4/05 11:13:46:548 EST] 61315440 FreePool E J2CA0045E: Connection not available while invoking method queueRequest for resource jms/SLSB/SLSBqcf001.
[3/4/05 11:13:46:836 EST] 61315440 ConnectionMan E J2CA0020E: The Connection Pool Manager could not allocate a Managed Connection: com.ibm.websphere.ce.j2c.ConnectionWaitTimeoutException: Connection not available, Timed out waiting for 180007
at com.ibm.ejs.j2c.poolmanager.FreePool.createOrWaitForConnection(FreePool.java:1030) |
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| fjb_saper |
| Posted: Sun Mar 06, 2005 7:13 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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If you have the release resources in the remove, you should have the acquire resources in the post create, put the resources in private variables (remember they must survive a passivate) and use them every time you call a method. Remember that the session should be created and released by each of the threads calling any of the methods accessing the queue.
Enjoy  |
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| wmq_guy |
| Posted: Sun Mar 06, 2005 7:30 pm Post subject: |
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Acolyte
Joined: 21 Oct 2004
Posts: 50
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I currently have it set up as:
| Code: |
class SessionBeanSender{
private QCF
private Q
private Session
private Qconn
....etc
ejbCreate(){ }
ejbRemove(){
Qconn.close()
}
sendMYMessage()
{
lookupQCF
lookupQ
create connection
create session
create TextMessage("hello")
sendTextMessage
qConn.close
qConn=null
}
}
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i recently added the qconn.close at the end , it was only in the ejbRemove..
you are saying add the creations in the ebjCreate() ? |
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| fjb_saper |
| Posted: Mon Mar 07, 2005 10:38 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Yes and remove creation from on message.
The only thing that should be in on Message is the session setup. sender setup, message send , session commit, sender close, session close.
This way you do not waste the overhead of creating a connection everytime.
Enjoy |
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