[jira] [Commented] (ACCUMULO-4420) Possible divide-by-zero exception when closing BatchWriter

["Josh Elser (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ACCUMULO-4420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15431999#comment-15431999 ] 

Josh Elser commented on ACCUMULO-4420:
--------------------------------------

Thanks, Dan!

> Possible divide-by-zero exception when closing BatchWriter
> ----------------------------------------------------------
>
>                 Key: ACCUMULO-4420
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4420
>             Project: Accumulo
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.6.5, 1.7.2
>            Reporter: Daniel Blum
>            Priority: Minor
>
> TabletServerBatchWriter.logStats will throw a divide-by-zero exception if numBatches is 0 (i.e., no batches have been written).
> There are actually no checks for 0 divisors anywhere in the method, so other such exceptions are possible, as are lesser issues ("Average send rate" and some other stats come out as NaN when no batches have been written, for example).



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