One bad node can incorrectly flag many files as corrupt
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Key: HDFS-1371
URL: https://issues.apache.org/jira/browse/HDFS-1371
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs client, name-node
Affects Versions: 0.20.1
Environment: yahoo internal version
[knogu...@gwgd4003 ~]$ hadoop version
Hadoop 0.20.104.3.1007030707
Reporter: Koji Noguchi
On our cluster, 12 files were reported as corrupt by fsck even though the
replicas on the datanodes were healthy.
Turns out that all the replicas (12 files x 3 replicas per file) were reported
corrupt from one node.
Surprisingly, these files were still readable/accessible from dfsclient
(-get/-cat) without any problems.
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