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https://issues.apache.org/jira/browse/HBASE-25378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17247006#comment-17247006
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Pankaj Kumar commented on HBASE-25378:
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Np [~ram_krish], yeah it's better to handle in getComparatorClass()
> Legacy comparator in Hfile trailer will fail to load
> ----------------------------------------------------
>
> Key: HBASE-25378
> URL: https://issues.apache.org/jira/browse/HBASE-25378
> Project: HBase
> Issue Type: Bug
> Affects Versions: 3.0.0-alpha-1, 2.4.0, 2.3.2
> Reporter: Pankaj Kumar
> Assignee: Pankaj Kumar
> Priority: Critical
> Fix For: 3.0.0-alpha-1, 2.4.0, 2.3.4
>
>
> HBASE-24968 moved MetaCellComparator out from CellComparatorImpl to avoid the
> deadlock issue. But this introduced compatibility issue, old hfile with
> comparator class as
> "org.apache.hadoop.hbase.CellComparator$MetaCellComparator" will fail to open
> due to ClassNotFoundException.
> Also we should also handle the case when comparator class is
> "org.apache.hadoop.hbase.CellComparatorImpl$MetaCellComparator", which was
> case before HBASE-24968.
>
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