OpenJMS 0.7.7-beta-1 java heapspace error

I have Open JMS 0.7.7-beta-1 running for about 3 months non-stop with
a dedicate java program I wrote that uses it. Their's 1 durable
subscriber and the rest are just regular ones. Then when calling the
TopicSuscriber.recieve() method I get hit with a
"javax.jms.JMSException: Java heap space" error. It goes on until I
have to restart openjms and my program again.

Is this exception happening from OpenJMS cos it ran out of memory? or
from me ? I'm just calling on receive() method the whole time.. btw
this is a durable suscriber that stays connected 24/7 for months on
end. So I dunno if that should raise an possible concerns.

Any ideas?

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