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https://issues.apache.org/jira/browse/HBASE-15579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15236101#comment-15236101
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Stephen Yuan Jiang commented on HBASE-15579:
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The draw back of this change is that we would have non-consecutive proc id - if
nonce exists, the generated proc id would be unused.
> Remove synchronized around nonce in Procedure submit
> ----------------------------------------------------
>
> Key: HBASE-15579
> URL: https://issues.apache.org/jira/browse/HBASE-15579
> Project: HBase
> Issue Type: Sub-task
> Components: proc-v2
> Affects Versions: 2.0.0, 1.2.0, 1.3.0, 1.1.4
> Reporter: Matteo Bertozzi
> Assignee: Matteo Bertozzi
> Priority: Trivial
> Fix For: 2.0.0, 1.3.0, 1.1.5, 1.2.2
>
> Attachments: HBASE-15579-v0.patch
>
>
> There is a synchronized in ProcedureExecutor.submitProcedure() that protect
> the nonce insert. We can get rid of that and just use the nonce concurrent
> map pufIfMissing
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