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https://issues.apache.org/jira/browse/HDFS-16776?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17606170#comment-17606170
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ASF GitHub Bot commented on HDFS-16776:
---------------------------------------

Kidd53685368 opened a new pull request, #4901:
URL: https://github.com/apache/hadoop/pull/4901

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   ### Description of PR
   [JIRA-HDFS-16776](https://issues.apache.org/jira/browse/HDFS-16776)
   The length of targets should be checked when DN gets a EC reconstruction 
task.For some reason 
([HDFS-14768](https://issues.apache.org/jira/browse/HDFS-14768), 
[HDFS-16739](https://issues.apache.org/jira/browse/HDFS-16739)) , the length of 
targets will be larger than additionalReplRequired which causes some elements 
in targets get the default value 0. It may trigger the bug which leads to the 
data corrupttion just like 
[HDFS-14768](https://issues.apache.org/jira/browse/HDFS-14768).




> Erasure Coding: The length of targets should be checked when DN gets a 
> reconstruction task
> ------------------------------------------------------------------------------------------
>
>                 Key: HDFS-16776
>                 URL: https://issues.apache.org/jira/browse/HDFS-16776
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Kidd5368
>            Assignee: Kidd5368
>            Priority: Major
>
> The length of targets should be checked when DN gets a EC reconstruction 
> task.For some reason (HDFS-14768, HDFS-16739) , the length of targets will be 
> larger than additionalReplRequired which causes some elements in targets get 
> the default value 0. It may trigger the bug which leads to the data 
> corrupttion just like HDFS-14768.



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