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Posted to issues@hbase.apache.org by "Hiroshi Ikeda (JIRA)" <ji...@apache.org> on 2016/02/19 11:47:18 UTC

[jira] [Updated] (HBASE-15292) Refined ZooKeeperWatcher to prevent ZooKeeper's callback while construction

     [ https://issues.apache.org/jira/browse/HBASE-15292?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hiroshi Ikeda updated HBASE-15292:
----------------------------------
    Assignee: Hiroshi Ikeda
      Status: Patch Available  (was: Open)

> Refined ZooKeeperWatcher to prevent ZooKeeper's callback while construction
> ---------------------------------------------------------------------------
>
>                 Key: HBASE-15292
>                 URL: https://issues.apache.org/jira/browse/HBASE-15292
>             Project: HBase
>          Issue Type: Bug
>          Components: Zookeeper
>            Reporter: Hiroshi Ikeda
>            Assignee: Hiroshi Ikeda
>            Priority: Minor
>         Attachments: HBASE-15292.patch
>
>
> The existing code is not just messy but also contains a subtle bug of visibility due to missing synchronization between threads.
> The root of the evil is that ZooKeeper uses a silly anti-pattern, starting a thread within its constructor, and in practice all the developers are not allowed to use ZooKeeper correctly without tedious code.



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