enable hdfs permission checking by default
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Key: HADOOP-2552
URL: https://issues.apache.org/jira/browse/HADOOP-2552
Project: Hadoop
Issue Type: Improvement
Components: dfs
Reporter: Doug Cutting
Fix For: 0.16.0
We should enable permission checking in dfs by default. Currently, on upgrade,
all file permissions are 777, so this is a back-compatible change. After an
upgrade folks can change owners and groups and limit permissions, and things
will work as expected.
The current default, dfs.permissions=false, gives inconsistent behaviour:
permissions are displayed in 'ls' and returned by the FileSystem APIs, but
they're not enforced. In future releases we will certainly want
dfs.permissions=true to be the default, and making it so now will thus also
avoid an incompatible change.
dfs.permissions=false should be an optional, non-default configuration that
some sites may decide to use. It is further defined in HADOOP-2543.
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