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Archive for September, 2014

Overriding Hadoop jars with MapReduce v2 – How to fix the classpath

We ran into a nasty problem with Hadoop when we wanted to use a ‘new’ version of Jackson. Hadoop decided to throw a NoSuchMethodError. It appeared Hadoop uses an ancient version of Jackson. Some terrible memories of classloading and JBoss EAP came into my head. After I was calmed down by some colleagues I ultimately found a solution.

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