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Posted to issues@hbase.apache.org by "Duo Zhang (JIRA)" <ji...@apache.org> on 2016/02/12 15:31:18 UTC
[jira] [Updated] (HBASE-14949) Resolve name conflict when splitting
if there are duplicated WAL entries
[ https://issues.apache.org/jira/browse/HBASE-14949?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Duo Zhang updated HBASE-14949:
------------------------------
Summary: Resolve name conflict when splitting if there are duplicated WAL entries (was: Skip duplicate entries when replay WAL.)
> 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
> Reporter: Heng Chen
> Attachments: HBASE-14949.patch, HBASE-14949_v1.patch, HBASE-14949_v2.patch
>
>
> As HBASE-14004 design, there will be duplicate entries in different WAL. It happens when one hflush failed, we will close old WAL with 'acked hflushed' length, then open a new WAL and write the unacked hlushed entries into it.
> So there maybe some overlap between old WAL and new WAL.
> We should skip the duplicate entries when replay. I think it has no harm to current logic, maybe we do it first.
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