I get the oddest error: I'm trying to run the hadoop tutorial example WordCount application. I copy the source code, and try to build it. I type "javac -classpath ~/hadoop-0.18.3-core.jar -d wordcount_classes WordCount.java". Javac fails, returning over 50 errors. This all starts with failures in compiling source lines 6-10: "package org.apache.hadoop.glip does not exist"; "package org.apache.hadoop.glop does not exist"; "package org.apache.hadoop.whatever does not exist". And so on and so forth and so on. All other errors seem to come from so many undefined functions. I verified there is no text error in my source code.
This execution pattern is totally repeatable. I renamed my existing hadoop-0.18.3.tar.gz, as well as my existing hadoop-0.18.3 directory. I next re-downloaded hadoop-0.18.3.tar.gz and once again extracted the directory. Diff reported both hadoop-0.18.3.tar.gz files are identical. Diff also reported that both hadoop-0.18.3-core.jar files are identical too. I tried again; I got the same result. I repeated the test, this time with a friend verifying my typing of the classpath specification: No typos. No difference in results. ACK! What? Help! Can anyone help me figure WHY? - Rich B.
