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Posted to common-issues@hadoop.apache.org by "Tsz Wo Nicholas Sze (JIRA)" <ji...@apache.org> on 2016/05/31 23:29:12 UTC

[jira] [Moved] (HADOOP-13226) Make retry also works well for Async DFS

     [ https://issues.apache.org/jira/browse/HADOOP-13226?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tsz Wo Nicholas Sze moved HDFS-10433 to HADOOP-13226:
-----------------------------------------------------

    Component/s:     (was: hdfs)
                 ipc
                 io
            Key: HADOOP-13226  (was: HDFS-10433)
        Project: Hadoop Common  (was: Hadoop HDFS)

> Make retry also works well for Async DFS
> ----------------------------------------
>
>                 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
>         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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