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Date: Mon, 10 Mar 2014 20:12:44 +0000 (UTC)
From: "Jimmy Xiang (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12699805.1394470663685.38017.1394482364229@arcas>
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Subject: [jira] [Updated] (HBASE-10714) SyncFuture hangs when sequence is 0
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     [ https://issues.apache.org/jira/browse/HBASE-10714?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jimmy Xiang updated HBASE-10714:
--------------------------------

    Status: Open  (was: Patch Available)

> SyncFuture hangs when sequence is 0
> -----------------------------------
>
>                 Key: HBASE-10714
>                 URL: https://issues.apache.org/jira/browse/HBASE-10714
>             Project: HBase
>          Issue Type: Bug
>          Components: wal
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
>             Fix For: 0.99.0
>
>         Attachments: hbase-10714.patch
>
>
> In SyncFuture, NOT_DONE = 0. The initial value of the ringBuffer is -1. So ringBuffer.next() gives 0 for the first call. If we create a SyncFuture with sequence = 0, even when we set it's done (ie. doneSequence = 0), it is still not done since doneSequence == NOT_DONE == 0.  Can we set NOT_DONE to -1, and the initial doneSequence to -2?


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