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https://issues.apache.org/jira/browse/HADOOP-11840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14498794#comment-14498794
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Kai Zheng commented on HADOOP-11840:
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Hi [~szetszwo],

Thanks for having this! I have related codes in HDFS-8156 that may partly 
address this issue. I would double check about this in the updated patch there. 
Sound OK? 

> ECSchema are considered as not equal even if they are logically equal
> ---------------------------------------------------------------------
>
>                 Key: HADOOP-11840
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11840
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: io
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Kai Zheng
>
> For example, a schema could have an empty options and another schema has all 
> the fields are the same except that options has NUM_DATA_UNITS_KEY => 
> numDataUnits.  Then, these two schemas are considered as not equal.



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