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Posted to yarn-dev@hadoop.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2013/09/12 17:44:53 UTC

[jira] [Created] (YARN-1185) FileSystemRMStateStore doesn't use temporary files when writing data

Jason Lowe created YARN-1185:
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             Summary: FileSystemRMStateStore doesn't use temporary files when writing data
                 Key: YARN-1185
                 URL: https://issues.apache.org/jira/browse/YARN-1185
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
    Affects Versions: 2.1.0-beta
            Reporter: Jason Lowe


FileSystemRMStateStore writes directly to the destination file when storing state. However if the RM were to crash in the middle of the write, the recovery method could encounter a partially-written file and either outright crash during recovery or silently load incomplete state.

To avoid this, the data should be written to a temporary file and renamed to the destination file afterwards.

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