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https://issues.apache.org/jira/browse/QPID-4224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13433998#comment-13433998
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Robbie Gemmell commented on QPID-4224:
--------------------------------------
You only get a random ID if you don't set it yourself via the ConnectionURL
used for the ConnectionFactory (either by doing what I mentioned above and
manipulating the properties at runtime, or literally having a ConnectionFactory
definition line in the JNDI file for every client).
You are correct that if you don't set it at that time then reconnecting to an
existing DurableSubscription (the queue name of which is based on the clientid)
wont be possible automatically (but obviously would be possible manually by
setting the clientid to the matching value at a later point).
> SetClientID does not have an effect
> -----------------------------------
>
> Key: QPID-4224
> URL: https://issues.apache.org/jira/browse/QPID-4224
> Project: Qpid
> Issue Type: Bug
> Components: Java Broker
> Affects Versions: 0.16
> Environment: Windows 7 64-bit, Java 1.6
> Reporter: Holger Caesar
> Priority: Critical
> Labels: AMQP, ClientID, JMS, QPID
> Original Estimate: 96h
> Remaining Estimate: 96h
>
> Hi everyone,
> I am currently evaluating QPID and AMQP in general. I have a JMS test
> application that works perfectly on a JMS compliant broker (non AMQP) and now
> I am trying to port it to QPID using only JMS features. Unfortunately I am
> having problems changing the client ID. I am aware that I can specify it in
> the AMQ://... string on startup, but since I want to read that string from a
> single .properties file, that is not a nice solution for 200 clients in
> parallel. Instead I tried using the setClientID method and setting the
> ignore_setClientID flag. The only effect this had was to ignore the error
> that is normally thrown.
> Below you can see the source code that basically does nothing other than
> reporting the requested ID change. Is there any workaround or solution to
> this problem??
> Thank you very much for your support,
> Holger
> public void setClientID(String clientID) throws JMSException
> {
> checkNotClosed();
> // in AMQP it is not possible to change the client ID. If one is not
> specified
> // upon connection construction, an id is generated automatically.
> Therefore
> // we can always throw an exception.
> if
> (!Boolean.getBoolean(ClientProperties.IGNORE_SET_CLIENTID_PROP_NAME))
> {
> throw new IllegalStateException("Client name cannot be changed
> after being set");
> }
> else
> {
> _logger.info("Operation setClientID is ignored using ID: " +
> getClientID());
> }
> }
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