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https://issues.apache.org/jira/browse/HDFS-14648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16914479#comment-16914479
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Wei-Chiu Chuang commented on HDFS-14648:
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[~leosun08] thanks for filing the jira. This appears like a pretty big patch
and touches a lot of internals in DFS client.
Please expect longer turn-around time.
Additionally, because the patch itself is non-trivial, let's find a better way
to drive this forward.
Instead of writing a few lines of high level descriptions, and pinging people
on the jira,
(1) would you please update the description to fill in the implementation
details?
(2) any thing worth noting? any new configurations? any thing that is not
supported/considered?
(3) has this been tested in production? can this be turned off?
Would some one like to sign up as the reviewer for this patch?
Historically, HDFS developers don't invest much HDFS client implementation. It
feels to me HBase community would be more interested. [~busbey] [~Apache9] do
you know who might be able to provide valuable feedback for this patch? Thanks.
> DeadNodeDetector basic model
> ----------------------------
>
> Key: HDFS-14648
> URL: https://issues.apache.org/jira/browse/HDFS-14648
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Lisheng Sun
> Assignee: Lisheng Sun
> Priority: Major
> Attachments: HDFS-14648.001.patch, HDFS-14648.002.patch,
> HDFS-14648.003.patch, HDFS-14648.004.patch
>
>
> This Jira constructs DeadNodeDetector state machine model. The function it
> implements as follow:
> # After DFSInputstream detects some DataNode die, it put in DeadNodeDetector
> and share this information to others in the same DFSClient. The ohter
> DFSInputstreams will not read this DataNode.
> # DeadNodeDetector also have DFSInputstream reference relationships to each
> DataNode. When DFSInputstream close, DeadNodeDetector also remove this
> reference. If some DeadNode of DeadNodeDetector is not read by
> DFSInputstream, it also is removed from DeadNodeDetector.
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