Chris Nauroth created HADOOP-11321:
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Summary: copyToLocal cannot save a file to an SMB share unless the
user has Full Control permissions.
Key: HADOOP-11321
URL: https://issues.apache.org/jira/browse/HADOOP-11321
Project: Hadoop Common
Issue Type: Bug
Components: fs
Affects Versions: 2.6.0
Reporter: Chris Nauroth
Assignee: Chris Nauroth
In Hadoop 2, it is impossible to use {{copyToLocal}} to copy a file from HDFS
to a destination on an SMB share. This is because in Hadoop 2, the
{{copyToLocal}} maps to 2 underlying {{RawLocalFileSystem}} operations:
{{create}} and {{setPermission}}. On an SMB share, the user may be authorized
for the {{create}} but denied for the {{setPermission}}. Windows denies the
{{WRITE_DAC}} right required by {{setPermission}} unless the user has Full
Control permissions. Granting Full Control isn't feasible for most
deployments, because it's insecure. This is a regression from Hadoop 1, where
{{copyToLocal}} only did a {{create}} and didn't do a separate
{{setPermission}}.
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