Hi all,
I just wanted to point out a mis-configuration that just bit me
today so that others can avoid the problem. My setup looks like:
HADOOP_HOME=<prefix>/hadoop-0.2-dev
HADOOP_CONF_DIR=<prefix>/conf
HADOOP_CONF_DIR had:
configuration.xsl*
hadoop-default.xml
hadoop-env.sh*
hadoop-site.xml*
mapred-default.xml*
slaves*
And when I upgrade, I only update HADOOP_HOME. The problem was that one
of the recent changes added some properties into hadoop-default.xml
that were different from their defaults in the code. Since the property
wasn't in my hadoop-default.xml, it used the compiled default value.
*crash* *bang*
After discussing it with Doug, the proper setup is to get
hadoop-default.xml out of the jar file, so that it always current with
respect to your distribution. After I deleted hadoop-default.xml out of
my conf directory, it worked great.
-- Owen
