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https://issues.apache.org/jira/browse/HADOOP-8323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13263888#comment-13263888
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Todd Lipcon commented on HADOOP-8323:
-------------------------------------

I agree with Jim - if we want a call which totally frees the memory, we should 
add a new one for it. But I don't see a big use case for that -- if you want to 
free the memory, why not just drop the reference to the Text object itself and 
start with a new one? Or call {{text.set(new byte[0])}}?

+1 for reverting HADOOP-7940.
                
> Revert HADOOP-7940
> ------------------
>
>                 Key: HADOOP-8323
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8323
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: io
>    Affects Versions: 2.0.0
>            Reporter: Harsh J
>            Assignee: Harsh J
>            Priority: Critical
>
> Per [~jdonofrio]'s comments on HADOOP-7940, we should revert it as it has 
> caused a performance regression (for scenarios where Text is reused, popular 
> in MR).
> The clear() works as intended, as the API also offers a current length API.

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