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https://issues.apache.org/jira/browse/HBASE-17085?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Duo Zhang updated HBASE-17085:
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Attachment: HBASE-17085-v2.patch
Polish on finishSync, will try to advance the highestSyncedTxid as much as
possible. Set default wal to AsyncFSWAL to see the pre commit build result.
Will revert to FSHLog when commit.
Thanks.
> AsyncFSWAL may issue unnecessary AsyncDFSOutput.sync
> ----------------------------------------------------
>
> Key: HBASE-17085
> URL: https://issues.apache.org/jira/browse/HBASE-17085
> Project: HBase
> Issue Type: Sub-task
> Components: wal
> Affects Versions: 2.0.0
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Fix For: 2.0.0
>
> Attachments: HBASE-17085-v1.patch, HBASE-17085-v2.patch,
> HBASE-17085.patch
>
>
> The problem is in appendAndSync method, we will issue an AsyncDFSOutput.sync
> if syncFutures is not empty. The SyncFutures in syncFutures can only be
> removed after an AsyncDFSOutput.sync comes back, so before the
> AsyncDFSOutput.sync actually returns, we will always issue an
> AsyncDFSOutput.sync after an append even if there is no new sync request.
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