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https://issues.apache.org/jira/browse/HBASE-19608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16303031#comment-16303031
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Zheng Hu commented on HBASE-19608:
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OK, +1 for this patch.
> Race in MasterRpcServices.getProcedureResult
> --------------------------------------------
>
> Key: HBASE-19608
> URL: https://issues.apache.org/jira/browse/HBASE-19608
> Project: HBase
> Issue Type: Bug
> Components: proc-v2
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Fix For: 2.0.0-beta-1
>
> Attachments: HBASE-19608-v1.patch, HBASE-19608-v2.patch,
> HBASE-19608.patch
>
>
> In ProcedureExecutor, we only consider a procedure to be finished when it is
> removed from the procedures map. But in MasterRpcServices.getProcedureResult,
> we will use the state of the procedure to determine whether it is finished.
> If setFailure is called, the procedure may enter the FAILED state which
> indicates it is finished before being removed from the procedure map, and
> then causes an assertion when we calling ProcedureExecutor.removeResult in
> MasterRpcServices.getProcedureResult.
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