> From: Daniel Mikusa [mailto:[email protected]]
> Subject: Re: Strange tomcat error and running out of file handles
> > SEVERE: Unable to process request in NioReceiver
> > java.lang.ThreadDeath
> > at java.lang.Thread.stop(Thread.java:758)
> > at net.bull.javamelody.Action.stopThread(Action.java:388)
> Looks like your application is calling Thread.stop().
In case the OP is unaware, _any_ use of Thread.stop() is a serious mistake. The
Javadoc description warns against its usage, but the warning is nowhere near
strong enough:
stop()
Deprecated.
This method is inherently unsafe. Stopping a thread with Thread.stop causes it
to unlock all of the monitors that it has locked (as a natural consequence of
the unchecked ThreadDeath exception propagating up the stack). If any of the
objects previously protected by these monitors were in an inconsistent state,
the damaged objects become visible to other threads, potentially resulting in
arbitrary behavior. Many uses of stop should be replaced by code that simply
modifies some variable to indicate that the target thread should stop running.
The target thread should check this variable regularly, and return from its run
method in an orderly fashion if the variable indicates that it is to stop
running. If the target thread waits for long periods (on a condition variable,
for example), the interrupt method should be used to interrupt the wait. For
more information, see Why are Thread.stop, Thread.suspend and Thread.resume
Deprecated?.
- Chuck
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