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https://issues.apache.org/jira/browse/HBASE-4476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13118429#comment-13118429
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Mikhail Bautin commented on HBASE-4476:
---------------------------------------
This patch passes all unit tests.
> Compactions must fail if column tracker gets columns out of order
> -----------------------------------------------------------------
>
> Key: HBASE-4476
> URL: https://issues.apache.org/jira/browse/HBASE-4476
> Project: HBase
> Issue Type: Bug
> Reporter: Mikhail Bautin
> Assignee: Mikhail Bautin
> Fix For: 0.92.0, 0.94.0
>
>
> We found this in ScanWildcardColumnTracker:
> // new col < oldcol
> // if (cmp < 0) {
> // WARNING: This means that very likely an edit for some other family
> // was incorrectly stored into the store for this one. Continue, but
> // complain.
> LOG.error("ScanWildcardColumnTracker.checkColumn ran " +
> "into a column actually smaller than the previous column: " +
> This went under the radar in our dark launch cluster when a column family
> name was misspelled first, but then was "renamed" by renaming directories in
> the HBase storage directory tree. We ended up with inconsistent data, but
> compactions still succeeded most of the time, likely discarding part of input
> data.
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