[jira] [Updated] (HDFS-1579) Browsing a block on the wrong datanode through web UI has unintuitive results

["Omer Trajman (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-1579?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Omer Trajman updated HDFS-1579:
-------------------------------

    Attachment: HDFS-1579

When browsing for a file with blockId that cannot be found the Web UI now returns a human readable error message and a link back to the file name.

> Browsing a block on the wrong datanode through web UI has unintuitive results
> -----------------------------------------------------------------------------
>
>                 Key: HDFS-1579
>                 URL: https://issues.apache.org/jira/browse/HDFS-1579
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node
>    Affects Versions: 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Omer Trajman
>              Labels: newbie
>         Attachments: HDFS-1579
>
>
> If you navigate through the web UI to view a file, and then the replica you're looking at is removed, the "Got error in response to OP_READ_BLOCK" message is printed in the content of the textarea that usually displays the text. This is confusing to users.
> Instead we should display the error message in a different format and direct the user to choose a different replica from the list of links at the bottom of the page. Or, alternatively, do an HTTP redirect to a different replica. We should also take care of the case where the generation stamp has a mismatch.

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