Namenode should log warning message when trying to start on a unformmatted
system
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Key: HDFS-2662
URL: https://issues.apache.org/jira/browse/HDFS-2662
Project: Hadoop HDFS
Issue Type: Improvement
Components: name-node
Affects Versions: 0.20.203.0
Environment: Single-node cluster on OS X 10.7 (Lion)
Reporter: William McNeill
Priority: Minor
When you try to start the namenode for a system that does not have a formatted
DFS, it fails silently without any indication that the lack of formatting was
the problem. I tried to run start-dfs.sh on a single-node cluster with an
unformatted HDFS. The namenode failed to start, but generated no warning
messages, and its log was empty. After running "hadoop namenode -format"
everything worked.
Details in this thread:
http://mail-archives.apache.org/mod_mbox/hadoop-common-user/201112.mbox/%3CCAN9z%2BopAn-t_f3FRC%3DDtV0n0ysoKd3Fek-fJPb68PMThiPooKg%40mail.gmail.com%3E
This is a difficult problem to diagnose because the namenode gives you no
feedback. It would be better if it printed an error message to its log file.
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