Improve start-up scripts to avoid common errors
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Key: ACCUMULO-252
URL: https://issues.apache.org/jira/browse/ACCUMULO-252
Project: Accumulo
Issue Type: Improvement
Components: start
Reporter: John Vines
Assignee: John Vines
One of the common issues we have is users not configuration things correctly in
the accumulo-env.sh script. Rather than default to setting dirs to non-existant
system variables, we should have a slightly more descriptive "/path/to/ITEM".
To work nicely with this, we should check these directories if they exist, and
if not error out with a descriptive message.
Lastly, we should export all system variables Accumulo will need to read
(HADOOP_HOME, ZOOKEEPER_HOME, etc.) just in case a user sets the variable but
doesn't export it.
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