Namenode should mark the replica as corrupted if a DN has reported different
length of a Complete block
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Key: HDFS-591
URL: https://issues.apache.org/jira/browse/HDFS-591
Project: Hadoop HDFS
Issue Type: Bug
Components: name-node
Reporter: Konstantin Boudnik
it has been found that NameNode is updating the length of a Complete block when
its reported by a DataNode. As demonstrated by BlockReport.messWithBlocksLen()
test ([see HDFS-551's
patch|https://issues.apache.org/jira/secure/attachment/12418437/HDFS-551.patch]),
when the length of blocks is changed and a block report is forced for the set
of the blocks NameNode updates these lengths in memory, instead of marking such
replicas as corrupted.
It seems to be a wrong behavior.
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