Kill Thread Within Java.exe Process

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John A. Bailo - 03 Aug 2007 01:23 GMT

I am monitoring a java application (running as a Windows service) from
a third party.

psinfo shows me all threads, and I noticed there were two that have
been running over 9 hours. It was about 9 hours ago that CPU
utilization on my Windows 2000 Server went up to 50%.

I know I use pskill to stop the entire java.exe -- but is there an
external command or program I can write to kill an individual thread
inside a java.exe ?

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Daniel Pitts - 03 Aug 2007 02:03 GMT

> I am monitoring a java application (running as a Windows service) from
> a third party.
[quoted text clipped - 6 lines]
> external command or program I can write to kill an individual thread
> inside a java.exe ?

No. You'll have stop the entire Java proces and start it again.

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Eric Sosman - 03 Aug 2007 03:14 GMT

Not unless you've arranged a way for the threads to stop
on (or shortly after) some external stimulus.

See the Javadoc for Thread#stop() to understand why this
cannot even be done safely from inside the Java program, much
less from the outside.

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Eric Sosman
esosman@ieee-dot-org.invalid

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Mike Schilling - 03 Aug 2007 07:11 GMT

>> I am monitoring a java application (running as a Windows service)
>> from a third party.
[quoted text clipped - 9 lines]
> Not unless you've arranged a way for the threads to stop
> on (or shortly after) some external stimulus.

One way of doing this to to run the JVM as debuggable. That lets you attach
a debugger later, examine the threads, and kill whichever ones you like.

> See the Javadoc for Thread#stop() to understand why this
> cannot even be done safely from inside the Java program, much
> less from the outside.

That's true, of course.

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Kill Thread Within Java.exe Process

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