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https://issues.apache.org/jira/browse/HDFS-4284?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jimmy Xiang reassigned HDFS-4284:
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Assignee: Jimmy Xiang
> BlockReaderLocal not notified of failed disks
> ---------------------------------------------
>
> Key: HDFS-4284
> URL: https://issues.apache.org/jira/browse/HDFS-4284
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs-client
> Affects Versions: 3.0.0, 2.0.2-alpha
> Reporter: Andy Isaacson
> Assignee: Jimmy Xiang
>
> When a DN marks a disk as bad, it stops using replicas on that disk.
> However a long-running {{BlockReaderLocal}} instance will continue to access
> replicas on the failing disk.
> Somehow we should let the in-client BlockReaderLocal know that a disk has
> been marked as bad so that it can stop reading from the bad disk.
> From HDFS-4239:
> bq. To rephrase that, a long running BlockReaderLocal will ride over local DN
> restarts and disk "ejections". We had to drain the RS of all its regions in
> order to stop it from using the bad disk.
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