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From "Vinayakumar B (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8270) create() always retried with hardcoded timeout when file already exists
Date Tue, 02 Jun 2015 04:38:17 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14568506#comment-14568506

Vinayakumar B commented on HDFS-8270:

bq.  The only concern is whether directly removing this retry may break some existing applications
which depend on this retry.
I agree with you. But, till HDFS-6478 was in, this retry was not working AFAIK, and only after
this real issue of waiting for long time started showing up. I will re-confirm again anyway.
In that case I don't think removing would be problem to existing applications.

> create() always retried with hardcoded timeout when file already exists
> -----------------------------------------------------------------------
>                 Key: HDFS-8270
>                 URL: https://issues.apache.org/jira/browse/HDFS-8270
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs-client
>    Affects Versions: 2.6.0
>            Reporter: Andrey Stepachev
>            Assignee: J.Andreina
>         Attachments: HDFS-8270.1.patch
> In Hbase we stumbled on unexpected behaviour, which could 
> break things. 
> HDFS-6478 fixed wrong exception
> translation, but that apparently led to unexpected bahaviour:
> clients trying to create file without override=true will be forced
> to retry hardcoded amount of time (60 seconds).
> That could break or slowdown systems, that use filesystem
> for locks (like hbase fsck did, and we got it broken HBASE-13574).
> We should make this behaviour configurable, do client really need
> to wait lease timeout to be sure that file doesn't exists, or it it should
> be enough to fail fast.

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