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From Oliver Schoett <>
Subject Re: jvm cowardly refuses to print a thread dump
Date Tue, 02 Dec 2008 13:35:33 GMT
Leon Rosenberg wrote:
> But back to the ArrayList, how high is the probability of having
> ArrayList.size() twice in the similar call-tree in one ThreadDump?

Very likely you have unsynchronized accesses to the ArrayList, which 
from time to time send one of the threads involved into an infinite 
tight loop inside an ArrayList access function.  A way to confirm this 
is to take two thread dumps a minute apart; if you find the *same* 
threads in the same ArrayList access functions, they loop infinitely.


Oliver Schoett

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