Add a metrics for tracking the number of reported corrupt replicas
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Key: HDFS-1537
URL: https://issues.apache.org/jira/browse/HDFS-1537
Project: Hadoop HDFS
Issue Type: Improvement
Components: name-node
Reporter: Hairong Kuang
Assignee: Hairong Kuang
Fix For: 0.23.0
We have a cluster, some of its datanodes' disks are corrupt. But it tooks us a
few days to be aware of the problem. Adding a metrics that keeps track of the
number of reported corrupt replicas would allow us to have an alert when
unusual number of corrupt replicas are reported.
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