on 09-18-2007 5:59 PM
hi friends,
my MDB is consuming one message at a time. Next message is only consumed after onMessage() is done with processing of current message.
I found one link which spoke about multpile instances of MDB being created using <parallel-consumers> property.
Link is <a href="https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/604e2b64-e689-2910-64b3-ffd650f83756">https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/604e2b64-e689-2910-64b3-ffd650f83756</a>
here is the excerpt.
<i>Since SAP NetWeaver 04 SP19 (and also in SAP NetWeaver
Application Server, JavaTM EE 5 Edition), a new property, parallel-consumers, has been
JMS Frequently Asked Questions 25
SAP Online Help 28.02.2007
introduced in the deployment descriptor ejb-j2ee-engine.xml. That can be used to tune the
performance for transacted MDBs on queues that are doing long blocking operations inside
their onMessage method. If the property is not specified, or has value 1, the server
functionality will not change in any way.
For example, if you define
<property>
<property-name>parallel-consumers</property-name
<property-value>10</property-value>
</property>
When you send messages to a queue, the JMS scales these messages into 10 mini-queues
and each such queue feeds one bean instance. So if you send a great number of
messages, they are scaled among these 10 MDB instances. However, if you publish only 2
messages from different connections, they potentially could fall into one and the same miniqueue
and be delivered sequentially.</i>
it says if same Queue connection is used to deliver two messages then it gets distributed among multiple instances. My codes does use same connection BUT still messages are being consumed sequentially.
The post says this property is supported since SAP NetWeaver 04 SP19 .
I am working on SAP Netweaver 04s , default SP which is 6.
does any one know whether 04S SP6 supports this property ?
If it does then am i still missing some configuration settings
anyone who knows this ? it has become a blocker issue for us. Any help will be highly appreciated
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