hadoop should log configuration reads
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Key: HADOOP-7573
URL: https://issues.apache.org/jira/browse/HADOOP-7573
Project: Hadoop Common
Issue Type: Improvement
Components: conf
Affects Versions: 0.20.203.0
Reporter: Ari Rabkin
Assignee: Ari Rabkin
Priority: Minor
Attachments: HADOOP-7573.patch
For debugging, it would often be valuable to know which configuration options
ever got read out of the Configuration into the rest of the program -- an
unread option didn't cause a problem. This patch logs the first time each
option is read.
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