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Deadlock

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Deadlock

Subject: Deadlock
From: Simon McLean <email@hidden>
Date: Fri, 16 Nov 2007 11:06:22 +0000

Hi All -

We have a deadlock problem with an app. Typically in such situations I follow Andrew Lindesay's excellent tutorial on using JDB to grab a thread dump off a hung instance and start digging from there. However, with this particular deadlock JDB doesn't work - i type "jdb -attach 8121" and then .... nothing. It just sits there. If i then kill off the instance in another terminal the jdb terminal springs into life saying the JVM has vanished.

I've checked I can connect to it and get a thread dump when the app is running happily so it must be the deadlock that is causing the problem.

Any ideas what is going wrong with JDB ? Or any advice on another way of tracking down the deadlock ?

Thanks, Simon
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