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https://issues.apache.org/jira/browse/HADOOP-13226?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo Nicholas Sze updated HADOOP-13226:
-----------------------------------------
Fix Version/s: (was: HDFS-9924)
2.8.0
> Support async call retry and failover
> -------------------------------------
>
> Key: HADOOP-13226
> URL: https://issues.apache.org/jira/browse/HADOOP-13226
> Project: Hadoop Common
> Issue Type: New Feature
> Components: io, ipc
> Reporter: Xiaobing Zhou
> Assignee: Tsz Wo Nicholas Sze
> Fix For: 2.8.0
>
> Attachments: h10433_20160524.patch, h10433_20160525.patch,
> h10433_20160525b.patch, h10433_20160527.patch, h10433_20160528.patch,
> h10433_20160528c.patch
>
>
> In current Async DFS implementation, file system calls are invoked and
> returns Future<?> immediately to clients. Clients call Future#get to retrieve
> final results. Future#get internally invokes a chain of callbacks residing in
> ClientNamenodeProtocolTranslatorPB, ProtobufRpcEngine and ipc.Client. The
> callback path bypasses the original retry layer/logic designed for
> synchronous DFS. This proposes refactoring to make retry also works for Async
> DFS.
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