On Sat, 2006-02-04 at 17:44, Scott M Stark wrote:
> It was the only way I found to implement a timeout behavior that had a
> chance of working when there were uncooperative tasks. See the
> org.jboss.test.util.test.
> ThreadPoolTaskUnitTestCase.testCompleteTimeoutWithSpinLoop as an
> example.
There is no real solution to that problem in java.
CPU loops don't respond to thread interrupts.
You can't even redefineClass() to add a
Thread.interrupted()
check in the misbehaving method, because it won't take affect on that
invocation.
Stopping the thread will avoid the cpu utilization problem,
but your JVM is now in an unknown/unstable state.
Connection c = dataSource.getConnection();
try
{
synchronized (lock)
{
spin(); // ---> Stop
}
}
finally
{
c.close(); // Never done
}
The connection leaks, I don't know what happens to the lock?
A better solution would be to "automatically" trigger a reboot if you
detect a misbehaving thread.
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of
> Adrian Brock
> Sent: Saturday, February 04, 2006 2:33 PM
> To: jboss-development@lists.sourceforge.net
> Subject: [JBoss-dev] BasicThreadPool and Thread.stop()
>
> I don't think it is a good idea to invoke Thread.stop().
> This has memory leak problems.
>
> Why was this introduced? The pooled threads are already daemon threads
> so they should not stop the system from exiting at shutdown.
>
> If you are not shutting down the system, then any objects
> on the stopped thread's stack are not garbage collected.
--
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Adrian Brock
Chief Scientist
JBoss Inc.
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