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https://issues.apache.org/jira/browse/HBASE-14949?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Duo Zhang resolved HBASE-14949.
-------------------------------
Resolution: Fixed
Release Note: Now we can write duplicated WAL entries into different WAL
files. This feature is required by the replication consistency fix and new
implementation of WAL writer.
> Resolve name conflict when splitting if there are duplicated WAL entries
> ------------------------------------------------------------------------
>
> Key: HBASE-14949
> URL: https://issues.apache.org/jira/browse/HBASE-14949
> Project: HBase
> Issue Type: Sub-task
> Components: wal
> Reporter: Heng Chen
> Assignee: Duo Zhang
> Fix For: 2.0.0, 1.3.0
>
> Attachments: HBASE-14949-addendum-branch-1.patch,
> HBASE-14949-v3.patch, HBASE-14949-v4.patch, HBASE-14949-v5.patch,
> HBASE-14949.patch, HBASE-14949_v1.patch, HBASE-14949_v2.patch
>
>
> The AsyncFSHLog introduced in HBASE-14790 may write same WAL entries to
> different WAL files. WAL entry itself is idempotent so replay is not a
> problem but the intermediate file name and final name when splitting is
> constructed using the lowest or highest sequence id of the WAL entries
> written, so it is possible that different WAL files will have same
> intermediate or final file name when splitting. In the currentm
> implementation, this will cause split fail or data loss. We need to solve
> this.
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