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Posted to dev@knox.apache.org by "Phil Zampino (JIRA)" <ji...@apache.org> on 2018/09/27 17:00:00 UTC
[jira] [Resolved] (KNOX-1440) WEBHDFS: retry should not be
attempted for datanode write failures
[ https://issues.apache.org/jira/browse/KNOX-1440?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Phil Zampino resolved KNOX-1440.
--------------------------------
Resolution: Fixed
> WEBHDFS: retry should not be attempted for datanode write failures
> ------------------------------------------------------------------
>
> Key: KNOX-1440
> URL: https://issues.apache.org/jira/browse/KNOX-1440
> Project: Apache Knox
> Issue Type: Improvement
> Components: Server
> Affects Versions: 1.1.0
> Reporter: Phil Zampino
> Assignee: Phil Zampino
> Priority: Major
> Fix For: 1.2.0
>
>
> For WEBHDFS invocations through Knox, if a *datanode* write fails with an IOException, the currently configured HA dispatch (DefaultHaDispatch) attempts the invocation the configured number of times.
> HDFS dev says that it would be appropriate to more simply respond with the error, deferring the decision to retry to the client.
> The best resolution for this is to have the datanode interactions use the DefaultDispatch (rather than the DefaultHaDispatch) even when HA is enabled, such that no retry/failover will be attempted for those interactions.
> (FYI: the datanode dispatch is configured in the WEBHDFS service definition)
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