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From "Enis Soztutar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4595) When short circuit read is disallowed, DFSClient does disable short circuit and fall back to regular reads
Date Tue, 12 Mar 2013 23:33:13 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13600618#comment-13600618
] 

Enis Soztutar commented on HDFS-4595:
-------------------------------------

bq. Why do you think stack trace at the client would help?
Stack traces for this from the client actually hurts us in HBase, in that, it puts a lot of
noise when we are hunting down some other exception.

                
> When short circuit read is disallowed, DFSClient does disable short circuit and fall
back to regular reads
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-4595
>                 URL: https://issues.apache.org/jira/browse/HDFS-4595
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs-client
>    Affects Versions: 2.0.0-alpha
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>         Attachments: HDFS-4595.patch, HDFS-4595.patch, HDFS-4595.patch
>
>
> In 1.0, when short circuit is disallowed for a user, the DFSClient disables short circuit
and falls back to the regular socket based reads over DataTransferProtocol. In release 2.0,
this fallback functionality is not working.

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