Details
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Task
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Status: Resolved
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Major
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Resolution: Fixed
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2.2.2
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None
Description
A common method of addressing failed disks, which is to set unwritable permissions on a directory such as /hadoop10 within the root filesystem.
Once mounted, the mounted filesystem will overlay the correct permissions structure, allowing hdfs to write to the mounted disk.
In the case of a failed mount operation, the associated /hadoop10 directory will be unwritable by hdfs.
However, Ambari will see the visible directory with incorrect permissions, and "fix" the permissions back to a writable directory-- resulting in the datanode filling the root partition of a machine.
We need to prevent ambari from changing permissions on YARN local and HDFS data dirs.
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