[jira] [Created] (HDFS-12630) Rolling restart can create inconsistency between blockMap and corrupt replicas map

["Andre Araujo (JIRA)" <ji...@apache.org>]

Andre Araujo created HDFS-12630:
-----------------------------------

             Summary: Rolling restart can create inconsistency between blockMap and corrupt replicas map
                 Key: HDFS-12630
                 URL: https://issues.apache.org/jira/browse/HDFS-12630
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 2.6.0
            Reporter: Andre Araujo


After a NN rolling restart several HDFS files started showing block problems. Running FSCK for one of the files or for the directory that contained it would complete with a FAILED message but without any details of the failure.

The NameNode log showed the following:

{code}
2017-10-10 16:58:32,147 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: FSCK started by hdfs (auth:KERBEROS_SSL) from /10.92.128.4 for path /user/prod/data/file_20171010092201.csv at Tue Oct 10 16:58:32 PDT 2017
2017-10-10 16:58:32,147 WARN org.apache.hadoop.hdfs.server.blockmanagement.BlockManager: Inconsistent number of corrupt replicas for blk_1941920008_1133195379 blockMap has 1 but corrupt replicas map has 2
2017-10-10 16:58:32,147 WARN org.apache.hadoop.hdfs.server.namenode.NameNode: Fsck on path '/user/prod/data/file_20171010092201.csv' FAILED
java.lang.ArrayIndexOutOfBoundsException
{code}

After triggering a full block report for all the DNs the problem went away.



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