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Posted to hdfs-dev@hadoop.apache.org by "Chris Nauroth (JIRA)" <ji...@apache.org> on 2014/09/22 20:16:34 UTC

[jira] [Created] (HDFS-7121) For JournalNode operations that must succeed on all nodes, attempt to undo the operation on all nodes if it fails on one node.

Chris Nauroth created HDFS-7121:
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             Summary: For JournalNode operations that must succeed on all nodes, attempt to undo the operation on all nodes if it fails on one node.
                 Key: HDFS-7121
                 URL: https://issues.apache.org/jira/browse/HDFS-7121
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: journal-node
            Reporter: Chris Nauroth


Several JournalNode operations are not satisfied by a quorum.  They must succeed on every JournalNode in the cluster.  If the operation succeeds on some nodes, but fails on others, then this may leave the nodes in an inconsistent state and require operations to do manual recovery steps.  For example, if {{doPreUpgrade}} succeeds on 2 nodes and fails on 1 node, then the operator will need to correct the problem on the failed node and also manually restore the previous.tmp directory to current on the 2 successful nodes before reattempting the upgrade.



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