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https://issues.apache.org/jira/browse/HBASE-16063?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Biju Nair updated HBASE-16063:
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Component/s: Scheduler
> Race condition in new FIFO fastpath from HBASE-16023
> ----------------------------------------------------
>
> Key: HBASE-16063
> URL: https://issues.apache.org/jira/browse/HBASE-16063
> Project: HBase
> Issue Type: Sub-task
> Components: Scheduler
> Affects Versions: 1.3.0
> Reporter: stack
> Priority: Major
>
> From [~ikeda] over in HBASE-16023 at
> https://issues.apache.org/jira/browse/HBASE-16023?focusedCommentId=15331172&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15331172
> {quote}
> An concrete example of the race condition:
> 1. Worker checks no task.
> 2. Reader checks no ready handler.
> 3. Worker pushes itself as a ready handler and waits on the semaphore.
> 4. Reader queues a task to the queue, without directly passing it to the
> ready handler nor releasing the semaphore.
> (1,3) and (2,4) should be exclusively executed. That depends on luck, and it
> might be not severe
> {quote}
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