I'm back to trying to add libraries to the classpath instead of handing
around a fat JAR. This time I've served up my directory full of JARs on
NFS, which each node in my cluster has mounted at /mnt/hadoop-libs. Now my
question is how to add that (local) directory to the classpath of the
mapper and reducer tasks. I've tried adding "-classpath
/mnt/hadoop-libs/*" to mapred.map.child.java.opts, but it doesn't seem to
work; the actual classpath I can see being called is just the local
/usr/lib/hadoop/lib stuff as usual.
