Dmitry Mozheyko wrote:
>-----Original Message-----
>From: Cheng Fang <Cheng.Fang_at_Sun.COM>
>To: dev_at_glassfish.dev.java.net
>Date: Tue, 01 Aug 2006 09:32:28 -0400
>Subject: Re: JMS error: Cannot allocate more connections.
>
>
>
>>Because you release JMS resources in @PreRemove method, you have no
>>control when they are released. @PreRemove methods are invoked when
>>beans are to be destroyed, maybe long after it has been returned to the
>>pool. In you app, every bean instance, even when they are in pool,
>>holds an open connection. Try releasing resources from within your
>>busines methods.
>>
>>Cheng
>>
>>
>
>Thank you.
>So is your way effective?
>What stateless-session-EJB methods i can use for safe initialization and finalization my resources?
>
>
Use some thing like the following anywhere in your Java EE code.... Note
that the JMS
connections are pooled. A programming model like the one below will give you
maximum reuse of connections in the pool.
Connection con = null;
Session sess = null;
try {
con = cf.createConnection();
sess = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
/<Business logic to send the messge>
} catch (Exception e) {
// Process Exception.
} finally {
try {
sess.close();
}catch (Exception ie) {
}
try {
conn.close();
}catch (Exception ie) {
}
}
- Binod.
>
>
>>
>>
>>Dmitry Mozheyko wrote:
>>
>>
>>
>>>Hello all.
>>>
>>>I need to use ejbTimers for sending jms messages. This is a parts of my session bean-code with @Timeout method:
>>>
>>>@Stateless
>>>public class CServiceTimerBean extends CBean implements CServiceTimerLocal {
>>> ...
>>> @Resource
>>> TimerService timerService;
>>>
>>> @Resource(mappedName="jms/ServiceDemandConnectionFactory")
>>> private ConnectionFactory connectionFactory;
>>>
>>> @Resource(mappedName="jms/ServiceDemandQueue")
>>> private Queue emailQueue;
>>>
>>> private Connection connection = null;
>>>
>>> private Session session = null;
>>>
>>> private MessageProducer messageProducer = null;
>>>
>>> @PostConstruct // Allocating JMS resources
>>> public void ejbPostConsruct() {
>>>
>>> try {
>>>
>>> connection = connectionFactory.createConnection();
>>> session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
>>> messageProducer = session.createProducer(emailQueue);
>>>
>>> } catch (JMSException e) {
>>>
>>> e.printStackTrace();
>>>
>>> }
>>>
>>> }
>>>
>>> @PostRemove // Release JMS resources
>>> public void ejbPostRemove() {
>>>
>>> try {
>>>
>>> messageProducer.close();
>>> session.close();
>>> connection.close();
>>>
>>> } catch (JMSException e) {
>>>
>>> e.printStackTrace();
>>>
>>> }
>>>
>>> }
>>> ...
>>> @Timeout
>>> public void timeout(Timer timer) {
>>> ...
>>> try {
>>> messageProducer.send(message);
>>> }
>>> ...
>>> }
>>>...
>>>
>>>After some count of message(near of JMS-pool default size) i receive this error:
>>>
>>>[#|2006-08-01T04:02:05.048+0400|WARNING|sun-appserver-pe9.1|javax.enterprise.resource.resourceadapter|_ThreadID=46;_ThreadName=p: thread-pool-1; w: 111;In-use connections equal max-pool-size and expired max-wait-time. Cannot allocate more connections.;_RequestID=33b5a5fe-b4af-4931-80f6-cb7f30a8231e;|RAR5117 : Failed to obtain/create connection. Reason : In-use connections equal max-pool-size and expired max-wait-time. Cannot allocate more connections.|#]
>>>
>>>[#|2006-08-01T04:02:05.049+0400|WARNING|sun-appserver-pe9.1|javax.enterprise.system.stream.err|_ThreadID=46;_ThreadName=p: thread-pool-1; w: 111;_RequestID=33b5a5fe-b4af-4931-80f6-cb7f30a8231e;|
>>>com.sun.messaging.jms.JMSException: MQRA:CFA:allocation failure:createConnection:Error in allocating a connection. Cause: In-use connections equal max-pool-size and expired max-wait-time. Cannot allocate more connections.
>>> at com.sun.messaging.jms.ra.ConnectionFactoryAdapter._createConnection(ConnectionFactoryAdapter.java:153)
>>> at com.sun.messaging.jms.ra.ConnectionFactoryAdapter.createConnection(ConnectionFactoryAdapter.java:136)
>>> at com.sun.messaging.jms.ra.ConnectionFactoryAdapter.createConnection(ConnectionFactoryAdapter.java:118)
>>> at ejb.session.CServiceTimerBean.ejbPostConsruct(Unknown Source)
>>>
>>>Why my JMS resources NOT releasing?
>>>
>>>
>>>
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>>>
>>>
>>>
>>>
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