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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-7382) Port ZK.multi support from HBASE-6775 to 0.96
Date Fri, 25 Jan 2013 05:55:15 GMT

     [ https://issues.apache.org/jira/browse/HBASE-7382?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Ted Yu updated HBASE-7382:

    Release Note: 

Instructs HBase to make use of ZooKeeper's multi-update functionality.
    This allows certain ZooKeeper operations to complete more quickly and prevents some issues
    with rare Replication failure scenarios (see the release note of HBASE-2611 for an example).
    IMPORTANT: only set this to true if all ZooKeeper servers in the cluster are on version
    and will not be downgraded.  ZooKeeper versions before 3.4 do not support multi-update
and will
    not fail gracefully if multi-update is invoked (see ZOOKEEPER-1495).
    Hadoop Flags: Reviewed
> Port ZK.multi support from HBASE-6775 to 0.96
> ---------------------------------------------
>                 Key: HBASE-7382
>                 URL: https://issues.apache.org/jira/browse/HBASE-7382
>             Project: HBase
>          Issue Type: Bug
>          Components: Zookeeper
>            Reporter: Gregory Chanan
>            Assignee: Himanshu Vashishtha
>            Priority: Critical
>             Fix For: 0.96.0
>         Attachments: 7382-trunk-v3.txt, 7382-trunk-v4.txt, 7382-trunk-v5.txt, 7382-trunk-v6.txt,
> HBASE-6775 adds support for ZK.multi ZKUtil and uses it for the 0.92/0.94 compatibility
fix implemented in HBASE-6710.
> ZK.multi support is most likely useful in 0.96, but since HBASE-6710 is not relevant
for 0.96, perhaps we should find another use case first before we port.

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