Comments on: Java Application – Make sure only single/one instance running – with File Lock and ShutdownHook

By: Federico

Federico — Fri, 18 Nov 2011 13:23:37 +0000

Hi Jimmy,

this is the best and cleaner solution I’ve found to the problem! Thanks for posting it!

The changes sassubra suggested make it works in Linux and Mac OS X too!

By: jimmy

jimmy — Wed, 07 Sep 2011 07:48:07 +0000

Binding a port is also another possible solution, the disadvantages is you gonna used 1 port available on your OS.

By: Lee

Lee — Thu, 01 Sep 2011 08:52:33 +0000

What about just binding a port? This is enforced as a non shared kernel resource, and cleaned up on process exit by the OS…..

By: jimmy

jimmy — Sun, 24 Jul 2011 00:31:04 +0000

@Yi: I think it should work on Linux.
Do the file created when the app run?

By: Yi

Yi — Fri, 22 Jul 2011 15:21:22 +0000

do you have solution for Linux mate?

By: Yi

Yi — Fri, 22 Jul 2011 15:20:48 +0000

Hey this approach does not work on Linux.

By: Omar

Omar — Thu, 26 Aug 2010 16:25:09 +0000

On Red Hat with Java 1.6 I experienced that the f.delete() were allowed and each new process would therefor delete the lock before trying to acquire it. It worked perfectly after I removed the same bit of code as sassubra mentioned.

By: Derek

Derek — Thu, 15 Jul 2010 21:10:41 +0000

@Sassubra
Why would that work?

By: sassubra

sassubra — Mon, 17 May 2010 21:51:50 +0000

You can remove the following lines from the code:

if (f.exists()) {
// if exist try to delete it
f.delete();
}

So that your code will work in solaris too.

By: jimmy

jimmy — Wed, 14 Apr 2010 05:07:45 +0000

@Peter:
Glad my article can help you
Cheers