This release fixes many bugs and also has a couple major improvements, including:

• Support for Hadoop speculative execution (HADOOP-82)
• Using bulk write API when writing to MongoDB
• Ability to deal with new types in Pig: bytes and UUID, MapWritable
• Support for the new 3.0 MongoDB Java Driver

If you'd like to try it out, you can do so by putting the following into your pom.xml:

<dependency>
    <groupId>org.mongodb.mongo-hadoop</groupId>
    <artifactId>mongo-hadoop-core</artifactId>
    <version>1.4-rc0</version>
</dependency>

Or if you use gradle, try this:

compile 'org.mongodb.mongo-hadoop:mongo-hadoop-core:1.4'

See History.md for more details.