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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-9574) Reduce client failures during datanode restart
Date Thu, 17 Dec 2015 23:07:46 GMT

     [ https://issues.apache.org/jira/browse/HDFS-9574?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Kihwal Lee updated HDFS-9574:
    Attachment: HDFS-9574.patch

Since {{DataXceiverServer}} is shared by multiple block pools, we cannot simply move its initialization
to later point. I will have each data transfer op wait up to configured amount of time before
giving up. A number of threads will pile up until the node registers, but it cannot serve
anyway, so I don't think we are introducing any more service degradation.

> Reduce client failures during datanode restart
> ----------------------------------------------
>                 Key: HDFS-9574
>                 URL: https://issues.apache.org/jira/browse/HDFS-9574
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>         Attachments: HDFS-9574.patch
> Since DataXceiverServer is initialized before BP is fully up, client requests will fail
until the datanode registers.

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