The problem is that you don't just poll the flag once; you have to do it over 
and over.  To make it work in a cluster, the flag has to be implemented as a 
clustered singleton mbean, which means that every lookup has to go through 
JNDI, which has relatively high overhead.

In our app, there are no places that get executed often enough to be useful as 
abort check points, yet seldom enough not to bog things down if every pass 
through them involves a JNDI lookup and mbean flag check.

So...any thoughts on non-polling-based techniques?

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