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https://issues.apache.org/jira/browse/HDFS-9289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14976735#comment-14976735
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Zhe Zhang commented on HDFS-9289:
---------------------------------

bq. the client after updatepipeline with the new gen stamp it later completed 
file with the old gen stamp
This looks very strange. But why do you think this happened? Did you see logs 
that the file was completed with an old GS?

> check genStamp when complete file
> ---------------------------------
>
>                 Key: HDFS-9289
>                 URL: https://issues.apache.org/jira/browse/HDFS-9289
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Chang Li
>            Assignee: Chang Li
>            Priority: Critical
>         Attachments: HDFS-9289.1.patch, HDFS-9289.2.patch
>
>
> we have seen a case of corrupt block which is caused by file complete after a 
> pipelineUpdate, but the file complete with the old block genStamp. This 
> caused the replicas of two datanodes in updated pipeline to be viewed as 
> corrupte. Propose to check genstamp when commit block



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