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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9173) Erasure Coding: Lease recovery for striped file
Date Fri, 18 Dec 2015 05:41:46 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9173?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15063516#comment-15063516
] 

Tsz Wo Nicholas Sze commented on HDFS-9173:
-------------------------------------------

> getSafeLength already handles this case. It sorts all lengths and gets the "smallest
length that covers at least 6 internal blocks". ...

It does not seem correct if we have hflush.  Here is an example:
{code}
 blk_0  blk_1  blk_2  blk_3  blk_4  blk_5  blk_6  blk_7  blk_8
  64k    64k    64k    64k     4k     0k    64k    64k    64k
{code}
Suppose blk_4 and blk_5 are unavailable.  The code will mistakenly consider this as a full
strip.


> Erasure Coding: Lease recovery for striped file
> -----------------------------------------------
>
>                 Key: HDFS-9173
>                 URL: https://issues.apache.org/jira/browse/HDFS-9173
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Walter Su
>            Assignee: Walter Su
>         Attachments: HDFS-9173.00.wip.patch, HDFS-9173.01.patch, HDFS-9173.02.step125.patch,
HDFS-9173.03.patch, HDFS-9173.04.patch, HDFS-9173.05.patch, HDFS-9173.06.patch, HDFS-9173.07.patch,
HDFS-9173.08.patch, HDFS-9173.09.patch
>
>




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