Just to let you know: if you are interested, some year ago I started an OpenSource project that allows the creation of Java plugin for Nagios without the overhead of the JVM (just one JVM is necessary to execute the JNRPE software; the plugins then runs inside the same JVM). The project is called JNRPE since it is a Java implementation of the NRPE communication protocol; to execute JNRPE plugins you must use check_nrpe. If you need to execute legacy plugins, they be executed through JNRPE using the EXEC JNRPE plugin. The project URL is <a href="http://sourceforge.net/apps/mediawiki/jnrpe/index.php?title=Main_Page">http://sourceforge.net/apps/mediawiki/jnrpe/index.php?title=Main_Page</a> Regards, Massimiliano