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https://issues.apache.org/jira/browse/SOLR-8069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14904408#comment-14904408
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Mark Miller commented on SOLR-8069:
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I was out on the phone last night - a fuller reply:
bq. What happens if the leaderZkNodeParentVersion doesn't match?
The leader cannot update the zk node as we want.
bq. Presumably that's a possibility or else why add the check.
It's the whole point of the patch?
bq. I'm certainly not well versed in this area of the code but checking
isLeader seems a little roundabount
There is no reason to go to zk if we already know we are not the leader locally
- what is roundabout about it?
bq. What does that mean?
That the fix worked??
> 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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