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MQSeries.net Forum Index » IBM MQ Java / JMS » Automate recovery for client on 2009 error

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WBI_user
PostPosted: Thu Oct 12, 2006 12:10 pm    Post subject: Automate recovery for client on 2009 error Reply with quote

Partisan

Joined: 07 Aug 2001
Posts: 386
We have JMS clients doing synchronous wait for messages on the server. If there is any network problem, it will get JMSException with embedded MQRC of 2009.
"com.ibm.mq.MQException: MQJE001: Completion Code 2 Reason 2009"
We want to provide some automatic retry for this error. For example, close the connection and reconnect.
Is there any concern about this kind of retry ? We will limit the retry to 2 or 3 times to prevent it from retrying forever.
I am not a JMS programmer. Is there a method already exist to extract just the reason code from the JMSException so that we can check and do conditional branch to retry?
or I can simply extract the field after reason in the exception message. This will rely on IBM not chnaging the format of the exception message.
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jefflowrey
PostPosted: Thu Oct 12, 2006 12:18 pm    Post subject: Reply with quote

Grand Poobah

Joined: 16 Oct 2002
Posts: 19981
The JMS exception will have a Linked Exception, which will be an MQException, which should have a getReasonCode() or some such.
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WBI_user
PostPosted: Thu Oct 12, 2006 1:06 pm    Post subject: Reply with quote

Partisan

Joined: 07 Aug 2001
Posts: 386
The code to trap the exception is the same as in the manual
:
} catch (JMSException je) {
System.out.println("caught "+je);
Exception e = je.getLinkedException();
if (e != null) {
System.out.println("linked exception: "+e);
}

I then tried
int reacode = e.getReasonCode()
System.out.println("Reason code is "+ reacode);

But get error
cannot resolve symbol
symbol : method getReasonCode()
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jefflowrey
PostPosted: Thu Oct 12, 2006 1:10 pm    Post subject: Reply with quote

Grand Poobah

Joined: 16 Oct 2002
Posts: 19981
You won't get it from a plain Exception.

http://publib.boulder.ibm.com/infocenter/wmqv6/v6r0/topic/com.ibm.mq.csqzaw.doc/csqzaw1462.htm
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