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https://issues.apache.org/jira/browse/HBASE-3929?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13129088#comment-13129088
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Matteo Bertozzi commented on HBASE-3929:
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Currently HFilePrettyPrinter raise a couple of exceptions if the HFile is
Empty, just because it doesn't check if seekTo() returns true or false, and the
first call after seekTo() is a scanner.getKeyValue() so you get a NPE...
I've added a v2 patch with the pkv rename, count == 0 handled, and seekTo
checked to fix the NPE.
> Add option to HFile tool to produce basic stats
> -----------------------------------------------
>
> Key: HBASE-3929
> URL: https://issues.apache.org/jira/browse/HBASE-3929
> Project: HBase
> Issue Type: New Feature
> Components: io
> Affects Versions: 0.92.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 0.94.0
>
> Attachments: HBASE-3929-v2.patch, hbase-3929-draft.patch,
> hbase-3929-draft.txt
>
>
> In looking at HBASE-3421 I wrote a small tool to scan an HFile and produce
> some basic statistics about it:
> - min/mean/max key size, value size (uncompressed)
> - min/mean/max number of columns per row (uncompressed)
> - min/mean/max number of bytes per row (uncompressed)
> - the key of the largest row
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