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Posted to dev@zookeeper.apache.org by "Thawan Kooburat (JIRA)" <ji...@apache.org> on 2013/10/08 05:22:50 UTC

[jira] [Commented] (ZOOKEEPER-1551) Observers ignore txns that come after snapshot and UPTODATE

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-1551?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13788871#comment-13788871 ] 

Thawan Kooburat commented on ZOOKEEPER-1551:
--------------------------------------------

committed to 3.5.0 and 3.4.6

> Observers ignore txns that come after snapshot and UPTODATE 
> ------------------------------------------------------------
>
>                 Key: ZOOKEEPER-1551
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1551
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: quorum, server
>    Affects Versions: 3.4.3
>            Reporter: Thawan Kooburat
>            Assignee: Thawan Kooburat
>            Priority: Blocker
>             Fix For: 3.4.6, 3.5.0
>
>         Attachments: ZOOKEEPER-1551-3.4.patch, ZOOKEEPER-1551-b3.4.patch, ZOOKEEPER-1551.patch, ZOOKEEPER-1551.patch, ZOOKEEPER-1551-trunk.patch, ZOOKEEPER-1551-trunk.patch, ZOOKEEPER-1551-trunk.patch
>
>
> In Learner.java, txns which comes after the learner has taken the snapshot (after NEWLEADER packet) are stored in packetsNotCommitted. The follower has special logic to apply these txns at the end of syncWithLeader() method. However, the observer will ignore these txns completely, causing data inconsistency. 



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