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Posted to hdfs-dev@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2017/10/13 16:27:02 UTC

[jira] [Created] (HDFS-12658) Lease renewal causes connection flapping

Daryn Sharp created HDFS-12658:
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             Summary: Lease renewal causes connection flapping
                 Key: HDFS-12658
                 URL: https://issues.apache.org/jira/browse/HDFS-12658
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: hdfs-client
    Affects Versions: 2.0.0-alpha
            Reporter: Daryn Sharp


Adding a dfsclient to the lease renewer use the minimum of 1/2 the soft timeout vs. 1/2 the client's timeout (when the client closes an idle connection).  Both default to 1m, so clients with open files that are otherwise not making calls to the NN will experience connection flapping.  Re-authentication is unnecessarily taxing on the ipc layer.




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