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https://issues.apache.org/jira/browse/HBASE-3598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13002306#comment-13002306
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Todd Lipcon commented on HBASE-3598:
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Oh, appears to be when trying to format NaN as a percentage.
> Broken formatting in LRU stats output
> -------------------------------------
>
> Key: HBASE-3598
> URL: https://issues.apache.org/jira/browse/HBASE-3598
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.90.1
> Reporter: Todd Lipcon
>
> I've seen this a few times - the output for LRU stats ends up with some
> invalid characters in it:
> 11/03/03 14:36:06 DEBUG hfile.LruBlockCache: LRU Stats: total=1.49 MB,
> free=180.56 MB, max=182.05 MB, blocks=0, accesses=0, hits=0, hitRatio=�%,
> cachingAccesses=0, cachingHits=0, cachingHitsRatio=�%, evictions=0,
> evicted=0, evictedPerRun=NaN
> Note the messed up "hitRatio" and "cachingHitsRatio". I can't figure out how
> to reproduce, though.
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