Routing to - users_at_genericjmsra.dev.java.net - where genericjmsra users
can chime in.
-G
Mark Williams wrote:
> At 10:49 AM 2/2/2006, Donald Forbes wrote:
>> Hi gurus,
>>
>> I have done some initial testing to try out a failure scenario with a
>> broker failing then restarting using an MDB in the application server
>> as the consumer.
>>
>> i.e. MDB application deployed in AS8 connecting to Sun MQ (3.6 SP3)
>> via generic ra (1.5 RC1).
>>
>> From the first test I have done I load up the queue with 1000 messages
>> then enable the MDB application. This starts to consume messages
>> from the broker then I shutdown the broker. I see that the MDB
>> continues processing messages for quite a while, this I assume is due
>> to the fact that the iMQ client runtime buffers a configured number of
>> messages.
>> (Ignoring any questions about transactions at the moment.) I then
>> restart the broker and wait. It seems that I can wait forever as
>> there is no attempt to reconnect to the broker and continue processing
>> messages.
>>
>> With AS7 this was not a problem because the app server would attempt
>> to reconnect (by default once a minute for 60 attempts) however this
>> behaviour does not seem to have been transferred over to AS8.
>>
>> There are configuration options for Sun MQ about reconnecting which I
>> will experiment with, however, other JMS providers may not have this
>> capability. Is there an option to ask either the application server
>> or the generic ra to attempt a reconnect? If so how should this be
>> configured?
>>
>> Many thanks
>>
>>
>>
>> Donald
>
> Well, I'm no guru on Generic RA, having just now started trying to use it.
>
> However I know there are Generic RA deployment settings you can add to
> the application to adjust it's behavior.
> Check out the website for documentation. (some seem intuitive)
> https://genericjmsra.dev.java.net
>
> I've found that a application can consume hundreds of messages off a
> waiting queue in a matter of seconds. Actually processing or *doing
> something* with those messages can take longer.
>
>
> <PRE>
>
>
> <mdb-resource-adapter>
> <resource-adapter-mid>genericra</resource-adapter-mid>
> <activation-config>
> <activation-config-property>
>
> <activation-config-property-name>DestinationType</activation-config-property-name>
>
>
> <activation-config-property-value>javax.jms.Queue</activation-config-property-value>
>
> </activation-config-property>
> <activation-config-property>
>
> <activation-config-property-name>DestinationProperties</activation-config-property-name>
>
>
> <activation-config-property-value>imqDestinationName=Queue</activation-config-property-value>
>
> </activation-config-property>
> <activation-config-property>
>
> <activation-config-property-name>MaxPoolSize</activation-config-property-name>
>
>
> <activation-config-property-value>32</activation-config-property-value>
> </activation-config-property>
> <activation-config-property>
>
> <activation-config-property-name>RedeliveryAttempts</activation-config-property-name>
>
>
> <activation-config-property-value>0</activation-config-property-value>
> </activation-config-property>
> <activation-config-property>
>
> <activation-config-property-name>ReconnectAttempts</activation-config-property-name>
>
>
> <activation-config-property-value>4</activation-config-property-value>
> </activation-config-property>
> <activation-config-property>
>
> <activation-config-property-name>ReconnectInterval</activation-config-property-name>
>
>
> <activation-config-property-value>10</activation-config-property-value>
> </activation-config-property>
> <activation-config-property>
>
> <activation-config-property-name>RedeliveryInterval</activation-config-property-name>
>
>
> <activation-config-property-value>1</activation-config-property-value>
> </activation-config-property>
> <activation-config-property>
>
> <activation-config-property-name>SendBadMessagesToDMD</activation-config-property-name>
>
>
> <activation-config-property-value>false</activation-config-property-value>
> </activation-config-property>
> <activation-config-property>
>
> <activation-config-property-name>DeadMessageDestinationClassName</activation-config-property-name>
>
>
> <activation-config-property-value>com.sun.messaging.Queue</activation-config-property-value>
>
> </activation-config-property>
> <activation-config-property>
>
> <activation-config-property-name>DeadMessageDestinationProperties</activation-config-property-name>
>
>
> <activation-config-property-value>imqDestinationName=DMDtest</activation-config-property-value>
>
> </activation-config-property>
> </activation-config>
> </mdb-resource-adapter>
>
>
> </PRE>
> Read/link to my blog at Sun Microsystems:
> http://blogs.sun.com/roller/page/fireman
>