Weird behavior of messageListener();

[johanneshiemer]

Hi Mark,
yes and an interesting fact is, that if you take a look at my ComposeListener above you can see the second var: private Job job;. If I put the variable into the onMessage(Message message...) method, then the messages are correct. So it seems that the issue is related to the Job var. But I don't have any idea why...do you have a clue?

Below the output mit local var in the method:

{"id":"af646cfc-c879-4757-a6dc-ddf6f18230a8","command":"COMPOSE","parentId":"3c9ace8c-3fdf-4e11-bf1c-00dc02dcc364","parentEntity":"CONFIGURATION","startDate":null,"endDate":null,"status":0,"statusMessage":null,"user":null,"parent":null}
{"id":"bd8cc583-acbf-4075-8bdc-1fd94d2a50a3","command":"COMPOSE","parentId":"3c9ace8c-3fdf-4e11-bf1c-00dc02dcc364","parentEntity":"CONFIGURATION","startDate":null,"endDate":null,"status":0,"statusMessage":null,"user":null,"parent":null}
{"id":"13092f44-8947-4e2a-8725-6780ae360f0f","command":"COMPOSE","parentId":"3c9ace8c-3fdf-4e11-bf1c-00dc02dcc364","parentEntity":"CONFIGURATION","startDate":null,"endDate":null,"status":0,"statusMessage":null,"user":null,"parent":null}

af646cfc-c879-4757-a6dc-ddf6f18230a8 executing COMPOSE Tue Jan 10 13:53:38 CET 2012
13092f44-8947-4e2a-8725-6780ae360f0f executing COMPOSE Tue Jan 10 13:53:38 CET 2012
bd8cc583-acbf-4075-8bdc-1fd94d2a50a3 executing COMPOSE Tue Jan 10 13:53:38 CET 2012

[Mark Fisher]

Yes, that's exactly what the problem is; since you are using an instance var there to store state passed in with each message, the code is not thread safe.

[Dave Syer]

ClassCastException? The logs from the client should tell you (I think it might be DEBUG level, not sure).