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From "Mark Miller (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-8069) Ensure that only the valid ZooKeeper registered leader can put a replica into Leader Initiated Recovery.
Date Wed, 23 Sep 2015 12:42:04 GMT

    [ https://issues.apache.org/jira/browse/SOLR-8069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14904435#comment-14904435
] 

Mark Miller commented on SOLR-8069:
-----------------------------------

So this adds sensible local isLeader checks where we were already checking ZK, it passes the
core descriptor instead of just a name to LIR so it has a lot more context to work with, and
it ensures that only the registered ZK leader can put a replica into LIR.

Barring any bugs in the current code, let's open further issues for other changes / improvements.

> Ensure that only the valid ZooKeeper registered leader can put a replica into Leader
Initiated Recovery.
> --------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-8069
>                 URL: https://issues.apache.org/jira/browse/SOLR-8069
>             Project: Solr
>          Issue Type: Bug
>            Reporter: Mark Miller
>            Assignee: Mark Miller
>            Priority: Critical
>         Attachments: SOLR-8069.patch, SOLR-8069.patch
>
>
> I've seen this twice now. Need to work on a test.
> When some issues hit all the replicas at once, you can end up in a situation where the
rightful leader was put or put itself into LIR. Even on restart, this rightful leader won't
take leadership and you have to manually clear the LIR nodes.
> It seems that if all the replicas participate in election on startup, LIR should just
be cleared.



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