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Posted to hdfs-dev@hadoop.apache.org by "Erik Krogen (JIRA)" <ji...@apache.org> on 2016/08/30 16:26:21 UTC

[jira] [Created] (HDFS-10817) Add Logging for Long-held NN Read Locks

Erik Krogen created HDFS-10817:
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             Summary: Add Logging for Long-held NN Read Locks
                 Key: HDFS-10817
                 URL: https://issues.apache.org/jira/browse/HDFS-10817
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: logging, namenode
            Reporter: Erik Krogen
            Assignee: Erik Krogen


Right now the Namenode will log when a write lock is held for a long time to help tracks methods which are causing expensive delays. Let's do the same for read locks since these operations may also be expensive/long and cause delays. 



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