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https://issues.apache.org/jira/browse/HDFS-13571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16884305#comment-16884305
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Lisheng Sun edited comment on HDFS-13571 at 7/13/19 1:16 PM:
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Hi [~jojochuang] [~sodonnell] [~elgoiri] [~xkrogen] [~hexiaoqiao] Could you
have time to pay attention to this issue? XIAOMI HBase availability is very
helpful by Dead DataNode Detector. Thank you.
If this issue is accepted, I will update new patch for trunk.
was (Author: leosun08):
Hi [~jojochuang] [~sodonnell] [~elgoiri] [~xkrogen] Could you have time to pay
attention to this issue? XIAOMI HBase availability is very helpful by Dead
DataNode Detector. Thank you.
If this issue is accepted, I will update new patch for trunk.
> Dead DataNode Detector
> ----------------------
>
> Key: HDFS-13571
> URL: https://issues.apache.org/jira/browse/HDFS-13571
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs-client
> Affects Versions: 2.4.0, 2.6.0, 3.0.2
> Reporter: Gang Xie
> Assignee: Lisheng Sun
> Priority: Minor
> Fix For: 3.0.2
>
> Attachments: HDFS-13571-2.6.diff
>
>
> Currently, the information of the dead datanode in DFSInputStream in stored
> locally. So, it could not be shared among the inputstreams of the same
> DFSClient. In our production env, every days, some datanodes dies with
> different causes. At this time, after the first inputstream blocked and
> detect this, it could share this information to others in the same DFSClient,
> thus, the ohter inputstreams are still blocked by the dead node for some
> time, which could cause bad service latency.
> To eliminate this impact from dead datanode, we designed a dead datanode
> detector, which detect the dead ones in advance, and share this information
> among all the inputstreams in the same client. This improvement has being
> online for some months and works fine. So, we decide to port to the 3.0 (the
> version used in our production env is 2.4 and 2.6).
> I will do the porting work and upload the code later.
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