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From cho ju il <tjst...@kgrid.co.kr>
Subject Why does not occur under a replica?
Date Mon, 06 Oct 2014 01:21:29 GMT
hadoop 2.4.1
Datanode disk failure.
But does not occur Under-Replicated Blocks.
Why does not occur Under-Replicated Blocks? 
If I restart the namenode(ha), Under-Replicated Blocks occurs.
**** namenode logs
org.apache.hadoop.hdfs.server.namenode.NameNode: Disk error on DatanodeRegistration DataNode
failed volumes:/data26/dfs/data/current; 
**** datanode 
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Completed checkDirs.
Removed 1 volumes. Current volumes
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Removing replica BP-876852240-
on failed volume /data26/dfs/data/current
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Removed 6051 out of 217873(took
99 millisecs)
org.apache.hadoop.hdfs.server.datanode.DataNode: DataNode.handleDiskError: Keep Running: true
org.apache.hadoop.hdfs.server.datanode.ReplicaNotFoundException: Replica not found for BP-876852240-
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