My patch to Congomongo that adds support for running MapReduce jobs in MongoDB was accepted, but that code hasn't yet been pushed out to the official Congomongo SNAPSHOT jar in Clojars.
Until that happens, if you'd like to use the new MapReduce code, you can use my version.
If you're using Leiningen, add this to your
And here's the dependency information for Maven:
<dependency> <groupId>org.clojars.christophermaier</groupId> <artifactId>congomongo</artifactId> <version>0.1.3-SNAPSHOT</version> </dependency>