Glen Vermeylen wrote:
Hello all,
We've seen strange behaviour on production (tomcat 5.5.20/java 6):
immediately after restart no-one could login. Using jconsole we saw that
there was a deadlock in the classloader.
Today I've also had the problem on development (tomcat 6.0.9/ java 6).
Its a
shame I was using tomcat 6.0.9 instead of 5.5.20, but it seems the two
problems are the same.
The problem occurs sometimes when multiple browsers are trying to
connect to
the server while it is still starting up.
I've tried to reproduce the problem on both 5.5.20 and 6.0.9 by trying to
start multiple browsers during application startup, but I cannot trigger
the
deadlock again.
Using jconsole I saw there were 2 httpthreads locking eachother.
Below are the stacktraces of both threads (I also have screenshots of
jconsole showing the threads the deadlocks-screen).
I couldn't find the problem myself, so I turn to this list for help.
The fix for bug 37458 did not turn out well (findClassInternal may loop,
so syncing on an entry during the defineClass call is bad).
Rémy
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