[jira] [Created] (HBASE-16063) Race condition in new FIFO fastpath from HBASE-16023

["stack (JIRA)" <ji...@apache.org>]

stack created HBASE-16063:
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             Summary: 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
    Affects Versions: 1.3.0
            Reporter: stack


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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