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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-11729) Improve NNStorageRetentionManager failure handling.
Date Mon, 01 May 2017 20:23:04 GMT
Kihwal Lee created HDFS-11729:

             Summary: Improve NNStorageRetentionManager failure handling.
                 Key: HDFS-11729
                 URL: https://issues.apache.org/jira/browse/HDFS-11729
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Kihwal Lee

Currently {{NNStorageRetentionManager}} will simply skip a storage directory if a problem
is detected.  Since checkpoint saving does not go through the same set of checks, this can
lead to a space exhaustion seen in HDFS-11714.

Instead of ignoring errors, it should handle it properly.  One potential improvement is to
catch the exception and report the storage directory failure using {{NNStorage.reportErrorsOnDirectories()}}.
{{attemptRestoreRemovedStorage()}} will need extra checks. E.g. existence of a VERSION file.

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