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https://issues.apache.org/jira/browse/ACCUMULO-3021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14075104#comment-14075104
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David Medinets commented on ACCUMULO-3021:
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What do you mean by 'very large split row'? I can think of several different 
definitions for this phrase. 

> Limit size of split rows
> ------------------------
>
>                 Key: ACCUMULO-3021
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3021
>             Project: Accumulo
>          Issue Type: Improvement
>    Affects Versions: 1.4.0
>            Reporter: Keith Turner
>             Fix For: 1.7.0
>
>
> Just ran into an issue where a very large split row was added to Accumulo.  
> The large split row caused the metadata table to split and was pushed up into 
> the root tablet.   This caused the root tablet to become unresponsive as many 
> clients and tservers tried to scan the root tablet.  Had to write a custom 
> utility for 1.4 to fix this.
> I am curious if 1.5 would have been able to merge it away.  Even if 1.5 could 
> merge it away, the root tablet becoming unresponsive was really bad.  It took 
> a lot of poking and proding to get the system to anything.  It would be best 
> to avoid this situation altogether.
> Could make the max split size configurable.  This config would be used to 
> limit automatic and user added splits.



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