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+1  Q: 

Can the Hadoop distributed cache addFileToClassPath .class files or is it limited to .jar files?

I've tried the following:

DistributedCache.addFileToClassPath(new Path("something.jar"), config);
DistributedCache.addFileToClassPath(new Path("something.class"),config);

The first one works, the second doesn't. Does addFileToClassPath only work for jars? This seems weird because there's also an addArchiveToClassPath method.

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