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https://issues.apache.org/jira/browse/HDFS-14373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16924914#comment-16924914
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Surendra Singh Lilhore edited comment on HDFS-14373 at 9/7/19 3:38 PM:
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[~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.
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
filed. 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: hdfs-client
> Affects Versions: 3.1.1
> Reporter: Surendra Singh Lilhore
> Assignee: Surendra Singh Lilhore
> Priority: Major
>
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