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Posted to hdfs-issues@hadoop.apache.org by "Chao Sun (JIRA)" <ji...@apache.org> on 2018/06/15 21:47:00 UTC
[jira] [Updated] (HDFS-13687) ConfiguredFailoverProxyProvider could
direct requests to SBN
[ https://issues.apache.org/jira/browse/HDFS-13687?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chao Sun updated HDFS-13687:
----------------------------
Attachment: HDFS-13687.000.patch
> 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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