Glassfish Clustering – NullPointerException while creating JMS RA

Didn’t I tell you that we had an exciting experience enabling cluster support for our applications using Glassfish.

Even though the entire setup worked fine in our local environment, life was not the same when trying to deploy our application on Amazon EC2 Cloud. We were greedy enough to pick a large machine with 8GB RAM and quad-core processors…and attempted to deploy our applications on the Glassfish Cluster there…
Our Server Instances would never start, failing with a whole bunch of NullPointerExceptions while creating JMS RA. I gave up after googling for couple of hours. And as usual, Venkat came to my rescue. He took over from me and spent some midnight oil and figured out the trick…
We had to add an unsupported property to the JVM…

com.sun.enterprise.connectors.system.enableAutoClustering=false

Check out this link from Ramesh Parthasarathy for more useful information related to this issue
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