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https://issues.apache.org/jira/browse/SOLR-7573?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14593924#comment-14593924
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Erick Erickson commented on SOLR-7573:
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On the theory that the replica being much busier than it needed to be was
leading to "bad stuff happening", I'm linking in SOLR-7333. Combined with
SOLR-7344 this may affect all three of these JIRAs.
> Inconsistent numbers of docs between leader and replica
> -------------------------------------------------------
>
> Key: SOLR-7573
> URL: https://issues.apache.org/jira/browse/SOLR-7573
> Project: Solr
> Issue Type: Bug
> Affects Versions: 4.10.3
> Reporter: Erick Erickson
> Assignee: Erick Erickson
>
> Once again assigning to myself to keep track. And once again not reproducible
> at will and possible related to firehosing updates to Solr.
> Saw a situation where things seemed to be indexed normally, but the number of
> docs on a leader and follower were not the same. The leader had, as I
> remember, a 4.5G index and the follower a 1.9G index. No errors in the logs,
> no recovery initiated, etc. All nodes green.
> The very curious thing was that when the follower was bounced, it did a full
> index replication from the leader. How that could be happening without the
> follower ever going into a recovery state I have no idea.
> Again, if I can get this to reproduce locally I can put more diagnostics into
> the process and see what I can see. I also have some logs to further explore.
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