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https://issues.apache.org/jira/browse/HDFS-445?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon updated HDFS-445:
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Attachment: hdfs-445-0.20-append.txt
Here's a patch against the current 0.20-append branch (probably about the same
as Jitendra's)
> pread() fails when cached block locations are no longer valid
> -------------------------------------------------------------
>
> Key: HDFS-445
> URL: https://issues.apache.org/jira/browse/HDFS-445
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 0.20-append
> Reporter: Kan Zhang
> Assignee: Kan Zhang
> Fix For: 0.21.0
>
> Attachments: 445-06.patch, 445-08.patch, hdfs-445-0.20-append.txt,
> HDFS-445-0_20.2.patch
>
>
> when cached block locations are no longer valid (e.g., datanodes restart on
> different ports), pread() will fail, whereas normal read() still succeeds
> through re-fetching of block locations from namenode (up to a max number of
> times).
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