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Author Message
  Topic: Delays using Selectors in MQv6
jan.taralczak

Replies: 7
Views: 8673
 PostForum: IBM MQ Java / JMS   Posted: Mon Nov 24, 2008 1:42 am   Subject: Delays using Selectors in MQv6 - Solution/Workaround
Changing to an alternative internal selector algorithm on the reply queue fixes the problem. Since our application does not rely on the message priority, we can live with the following workaround:

...
  Topic: Delays using Selectors in MQv6
jan.taralczak

Replies: 7
Views: 8673
 PostForum: IBM MQ Java / JMS   Posted: Tue Jul 29, 2008 10:17 pm   Subject: Re: Tuning socket parameters in MQv6
I would also seriously question the reason why you are using a selector if you don't care about the correlId.

Of course we do require correlId matching. This is a standard feature from MQ that sho ...
  Topic: Delays using Selectors in MQv6
jan.taralczak

Replies: 7
Views: 8673
 PostForum: IBM MQ Java / JMS   Posted: Mon Jul 28, 2008 10:15 pm   Subject: Tuning socket parameters in MQv6
This is the stack trace where JMS MQv6 Solaris 10 hangs for up to 5s using selector JMSCorrelationID like ...% if there is at least one message in the queue with an empty CorrelationID.

SocketInput ...
  Topic: Delays using Selectors in MQv6
jan.taralczak

Replies: 7
Views: 8673
 PostForum: IBM MQ Java / JMS   Posted: Sun Jul 27, 2008 10:47 pm   Subject: Enabling MQ-Trace revokes the 5s delay bug
Adding the following MQ-Trace statement eliminates the 5s delays

MQEnvironment.enableTracing(1, System.out);

Here is the proof:

# time test40getWithMQtrace
real 0m8.205s
...
  Topic: Delays using Selectors in MQv6
jan.taralczak

Replies: 7
Views: 8673
 PostForum: IBM MQ Java / JMS   Posted: Thu Jul 24, 2008 10:53 pm   Subject: Delays using Selectors in MQv6
Since migration from MQv5.3 to MQv6 Solaris10 I observe 5s delays in queueReceiver.receive(timeoutMs) having a queueReceiver with selector, e.g. JMSCorrelationID like ...%. The QCF options setPollingI ...
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