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I wrote up this blog to help a Terracotta user who has a deadlock across his application nodes in production. In it, I wrote a simple lock-ordering deadlock where 2 threads (in this case, they are running across JVMs so they wouldn't deadlock alone but do in a cluster) get stuck fighting for the same locks in opposing order. I then show how to use the Terracotta GUI tools to track down the deadlock right to the lines of code in my app that are suspect.