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https://issues.apache.org/jira/browse/HBASE-15094?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15096559#comment-15096559
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Vladimir Rodionov commented on HBASE-15094:
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[~jinghe]
This is new code and logic behind BackupLogCleaner implementation.
> Selection of WAL files eligible for incremental backup is broken
> ----------------------------------------------------------------
>
> Key: HBASE-15094
> URL: https://issues.apache.org/jira/browse/HBASE-15094
> Project: HBase
> Issue Type: Sub-task
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
> Fix For: 2.0.0
>
>
> We should add to a selection WAL files which have been copied over by
> different backup sessions and which are newer than the most recent files
> processed for a given table. Currently, we look for WAL files only in a files
> system (WALs and OldWALs directories)
> Scenario
> Full Backup T1
> Full Backup T2
> Created WAL1
> Incremental Backup T1 (WAL1 becomes eligible for deletion)
> some time later
> Incremental Backup T2 (WAL1 can be deleted by this time and won't get it into
> WAL file list for T2)
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