Greetings, I've released a new version of the SNMPTrapAppender. The new version addresses problems involved with compatibility with Log4J version 1.2.x, as well as attempting to address a raft of complaints/requests that I've received over the course of the last year. Here's the blurb I've added to the page on my Web site: "Version 1.2 of the appender features an entirely new, pluggable architecture. The appender itself has been changed to use an implementation of the SnmpTrapSenderFacade, an Interface provided with this version of the appender. Any class that implements this interface can be used by the appender to send traps. This allows you to write your own concrete implementation of the interface, and plug it in to the appender, by simply specifying the fully qualified class name of your implementation class in the Log4J properties file. The appender provides two concrete implementations for you to choose from, if you don't choose to "roll your own". * The JoeSNMPTrapSender uses the JoeSNMP library from the OpenNMS project. You'll need a copy of JoeSNMP to use the appender. You can get more information about OpenNMS here. You can get a copy of JoeSNMP here. Thanks to Jin Zhao for pointing me towards this! * The WengsoftSNMPTrapSender uses the open-source WENG-SOFT SNMP library. You can get a copy of the WENG-SOFT SNMP library here. Thanks to Victor Tsucanov for pointing me towards this! The distribution format of version 1.2 is also new. Rather than simply distribute the raw source code, as I did/do for version 1.1, v. 1.2 also comes with a Jar library, ready for you to drop into your classpath. The raw source code technique forced you, as user, to add these classes to the sources of Log4J by hand and compile a custom Log4J Jar -- lots of people complained about that, so I've changed it. The source code, and the JavaDoc's, are also included, of course. Finally, the two versions are being maintained here seperately because Log4J 1.2.x includes changes that break the version 1.1 appender, and the changes needed to fix it are not backwards compatible with Log4J 1.1.x." The appender can be found at http://www.m2technologies.net, under "Data" - "SNMPTrapAppender". Feedback, suggestions and contributions are welcome, as always. Cheers, Mark