[jira] [Assigned] (IGNITE-13495) ZookeeperDiscoverySpiMBeanImpl#getCoordinator can return invalid node as coordinator

["Sergei Ryzhov (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-13495?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergei Ryzhov reassigned IGNITE-13495:
--------------------------------------

    Assignee: Sergei Ryzhov

> ZookeeperDiscoverySpiMBeanImpl#getCoordinator can return invalid node as coordinator
> ------------------------------------------------------------------------------------
>
>                 Key: IGNITE-13495
>                 URL: https://issues.apache.org/jira/browse/IGNITE-13495
>             Project: Ignite
>          Issue Type: Bug
>    Affects Versions: 2.9
>            Reporter: Ivan Daschinskiy
>            Assignee: Sergei Ryzhov
>            Priority: Major
>              Labels: newbie, zookeeper
>             Fix For: 2.10
>
>
> Due to invalid algorithm in {{org.apache.ignite.spi.discovery.zk.internal.ZookeeperDiscoveryImpl#getCoordinator}}
> sometimes invalid coordinator could be return
> Consider scenarion:
> 1. Start server #1
> 2. Start client
> 3. Start server #2
> 4. Stop server #1
> After this, {{ZookeeperDiscoverySpiMBeanImpl#getCoordinator}} returns as coordinator a client, because it is the oldest node in topology.
> We should fix {{org.apache.ignite.spi.discovery.zk.internal.ZookeeperDiscoveryImpl#getCoordinator}} to return *oldest server*, not any node.



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