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https://issues.apache.org/jira/browse/HBASE-14503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14934463#comment-14934463
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Elliott Clark commented on HBASE-14503:
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This basically means that users have a very hard time deleting a column family
if there is any data with an empty qualifier.
Take this example.
T=1000 User Puts some data "FOO" in column "A:one".
T=1001 User Deletes the column family "A:".
T=1002 User puts some data "BAR" in column "A:" ( empty qualifier ).
Scan the row with versions => 1 will return both FOO and BAR.
Scan the row with versions => 99 will return BAR.
OUCH!
> DeleteFamily tombstones don't work well with empty qualifiers
> -------------------------------------------------------------
>
> Key: HBASE-14503
> URL: https://issues.apache.org/jira/browse/HBASE-14503
> Project: HBase
> Issue Type: Bug
> Reporter: Elliott Clark
>
> Since key type is only used as the tie breaker if a user issues a put with an
> empty qualifier it can hide the delete when versions on a scan is 1.
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