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From "Chao Sun (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-13687) ConfiguredFailoverProxyProvider could direct requests to SBN
Date Fri, 15 Jun 2018 21:48:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-13687?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chao Sun updated HDFS-13687:
----------------------------
    Status: Patch Available  (was: Open)

> ConfiguredFailoverProxyProvider could direct requests to SBN
> ------------------------------------------------------------
>
>                 Key: HDFS-13687
>                 URL: https://issues.apache.org/jira/browse/HDFS-13687
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Chao Sun
>            Assignee: Chao Sun
>            Priority: Minor
>         Attachments: HDFS-13687.000.patch
>
>
> In case there are multiple SBNs, and {{dfs.ha.allow.stale.reads}} is set to true, failover
could go to a SBN which then may serve read requests from client. This may not be the expected
behavior. This issue arises when we are working on HDFS-12943 and HDFS-12976.
> A better approach for this could be to check {{HAServiceState}} and find out the active
NN when performing failover. This also can reduce the # of failovers the client has to do
in case of multiple SBNs.



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