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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-9839) Reduce verbosity of processReport logging
Date Sat, 20 Feb 2016 18:06:18 GMT
Arpit Agarwal created HDFS-9839:
-----------------------------------

             Summary: Reduce verbosity of processReport logging
                 Key: HDFS-9839
                 URL: https://issues.apache.org/jira/browse/HDFS-9839
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: namenode
    Affects Versions: 2.8.0
            Reporter: Arpit Agarwal
            Assignee: Arpit Agarwal


{{BlockManager#processReport}} logs one line for each invalidated block at INFO. HDFS-7503
moved this logging outside the NameSystem write lock but we still see the NameNode being slowed
down when the number of block invalidations is very large e.g. just after a large amount of
data is deleted.

{code}
      for (Block b : invalidatedBlocks) {
        blockLog.info("BLOCK* processReport: {} on node {} size {} does not " +
            "belong to any file", b, node, b.getNumBytes());
      }
{code}

We can change this statement to DEBUG and just log the number of block invalidations at INFO.



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