Hi Devs,

 We have seen couple of Block missing issues in stress testing. ( mostly all 
were with default configurations )

 1) HDFS-3584 Blocks are getting marked as corrupt with append operation under 
high load.
 2) HDFS-3585 Blocks are getting marked as corrupt when 
commitblocksyncronization(Since recovery called by another client) is success 
before BR send
 3) HDFS-3122 Block recovery with closeFile flag true can race with 
blockReport. Due to this blocks are getting marked as corrupt.

 4) HDFS-3605 Block mistakenly marked corrupt during edit log catchup phase of 
failover  =====  Already Fixed

I would like your involvement in the discussion and comments on this issues for 
the further progress.

Regards,
Uma

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