Arpit Gupta created HDFS-3977:
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Summary: Incompatible change between hadoop-1 and hadoop-2 when
the dfs.hosts and dfs.hosts.exclude files are not present
Key: HDFS-3977
URL: https://issues.apache.org/jira/browse/HDFS-3977
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 2.0.2-alpha
Reporter: Arpit Gupta
Assignee: Arpit Gupta
While testing hadoop-1 and hadoop-2 the following was noticed
if the files in the properties dfs.hosts and dfs.hosts.exclude do not exist
in hadoop-1 namenode format and start went through successfully.
in hadoop-2 we get a file not found exception and both the format and the
namenode start commands fail.
We should be logging a warning in the case when the file is not found so that
we are compatible with hadoop-1
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