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From "Vinayakumar B (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-8270) create() always retried with hardcoded timeout when file already exists with open lease
Date Fri, 14 Aug 2015 10:47:48 GMT

     [ https://issues.apache.org/jira/browse/HDFS-8270?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vinayakumar B updated HDFS-8270:
--------------------------------
    Labels:   (was: 2.6.1-candidate)

> create() always retried with hardcoded timeout when file already exists with open lease
> ---------------------------------------------------------------------------------------
>
>                 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
>             Fix For: 2.6.1, 2.7.1
>
>         Attachments: HDFS-8270-branch-2.6-v3.patch, HDFS-8270-branch-2.7-03.patch, HDFS-8270.1.patch,
HDFS-8270.2.patch, HDFS-8270.3.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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