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From "Mike Solomon (JIRA)" <j...@apache.org>
Subject [jira] Commented: (ZOOKEEPER-335) zookeeper servers should commit the new leader txn to their logs.
Date Thu, 17 Jun 2010 22:15:23 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12879967#action_12879967
] 

Mike Solomon commented on ZOOKEEPER-335:
----------------------------------------

I am having this exact issue, but I am not upgrading. I am merely restarting the cluster.

I have a cluster of three. I took down host1 and verified that my application remained and
reconnected to host2 and host3.

With host1 back online, I took down host2. I noticed that the java process was spinning over
100% CPU and realized it had not come back up.

This is running the 3.3.0 JAR release on a dual proc, quad-core Intel box. I'm running SuSE
10.3, 64-bit, with this version of java:

java version "1.6.0_10"
Java(TM) SE Runtime Environment (build 1.6.0_10-b33)
Java HotSpot(TM) Server VM (build 11.0-b15, mixed mode)

I will attach a log file.

> zookeeper servers should commit the new leader txn to their logs.
> -----------------------------------------------------------------
>
>                 Key: ZOOKEEPER-335
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-335
>             Project: Zookeeper
>          Issue Type: Bug
>          Components: server
>    Affects Versions: 3.1.0
>            Reporter: Mahadev konar
>            Assignee: Mahadev konar
>            Priority: Blocker
>             Fix For: 3.4.0
>
>
> currently the zookeeper followers do not commit the new leader election. This will cause
problems in a failure scenarios with a follower acking to the same leader txn id twice, which
might be two different intermittent leaders and allowing them to propose two different txn's
of the same zxid.

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