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https://issues.apache.org/jira/browse/HDDS-1072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16797714#comment-16797714
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Xiaoyu Yao commented on HDDS-1072:
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Cherry-pick to 0.4 as dependency of HDDS-1246 and HDDS-919.
> Implement RetryProxy and FailoverProxy for OM client
> ----------------------------------------------------
>
> Key: HDDS-1072
> URL: https://issues.apache.org/jira/browse/HDDS-1072
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Components: Ozone Manager
> Reporter: Hanisha Koneru
> Assignee: Hanisha Koneru
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.4.0
>
> Attachments: HDDS-1072.001.patch, HDDS-1072.002.patch,
> HDDS-1072.003.patch, HDDS-1072.004.patch, HDDS-1072.005.patch,
> HDDS-1072.006.patch, HDDS-1072.007.patch
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> RPC Client should implement a retry and failover proxy provider to failover
> between OM Ratis clients. The failover should occur in two scenarios:
> # When the client is unable to connect to the OM (either because of network
> issues or because the OM is down). The client retry proxy provider should
> failover to next OM in the cluster.
> # When OM Ratis Client receives a response from the Ratis server for its
> request, it also gets the LeaderId of server which processed this request
> (the current Leader OM nodeId). This information should be propagated back to
> the client. The Client failover Proxy provider should failover to the leader
> OM node. This helps avoid an extra hop from Follower OM Ratis Client to
> Leader OM Ratis server for every request.
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