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Posted to mapreduce-user@hadoop.apache.org by cho ju il <tj...@kgrid.co.kr> on 2014/10/01 11:07:37 UTC
A disk failure occurs, but did not occur under this block.
hadoop 2.4.1
2 namenodes + 11 datanodes
A disk failure occurs, but did not occur under this block.
So I tested the removing disk.
Change the config and restart the datanode.
before
<name>dfs.datanode.data.dir</name>
<value>file:/disk01/data/dfs/data,file:/disk02/data/dfs/data,file:/disk03/data/dfs/data</value>
after
<name>dfs.datanode.data.dir</name>
<value>file:/disk01/data/dfs/data,file:/disk02/data/dfs/data</value>
I tested all of the data nodes.
Occurs under-blocks in some cases and replication blocks.
Strangely this did not occur under the block in some cases.
And the error occurred.
2014-10-01 17:21:43,841 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: datanode-192.168.10.18:90010:DataXceiver error processing READ_BLOCK operation src: /192.168.10.18:38954 dst: /192.168.10.18:90010
org.apache.hadoop.hdfs.server.datanode.ReplicaNotFoundException: Replica not found for BP-665073150-127.0.0.1-1393573366664:blk_1073756063_15239