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Posted to hdfs-issues@hadoop.apache.org by "Surendra Singh Lilhore (Jira)" <ji...@apache.org> on 2019/10/01 11:08:00 UTC
[jira] [Comment Edited] (HDFS-14373) EC : Decoding is failing when
block group last incomplete cell fall in to AlignedStripe
[ https://issues.apache.org/jira/browse/HDFS-14373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16924914#comment-16924914 ]
Surendra Singh Lilhore edited comment on HDFS-14373 at 10/1/19 11:07 AM:
-------------------------------------------------------------------------
[~zhaoyim]
| D1 | D2 | D3 | P1 | P2 |
Consider the 3+2 policy stripe, here D1,D2 cell are completed and D3 is half filled. If we try to do the positional read for "D2" and read got failed then reconstruction is required.
In positional read last cell length is not considered for stripe creation and this cause the failure.
was (Author: surendrasingh):
[~zhaoyim]
| D1 | D2 | D3 | P1 | P2 |
Consider the 3+2 policy stripe, here D1,D2 shell are complete and D3 is half filled. If we try to do the positional read for "D2" and read got failed then reconstruction is required.
In positional read last shell length is not considered for stripe creation and this cause the failure.
> EC : Decoding is failing when block group last incomplete cell fall in to AlignedStripe
> ---------------------------------------------------------------------------------------
>
> Key: HDFS-14373
> URL: https://issues.apache.org/jira/browse/HDFS-14373
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ec, hdfs-client
> Affects Versions: 3.1.1
> Reporter: Surendra Singh Lilhore
> Assignee: Surendra Singh Lilhore
> Priority: Critical
> Attachments: HDFS-14373.001.patch, HDFS-14373.002.patch
>
>
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