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https://issues.apache.org/jira/browse/SOLR-13815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16949901#comment-16949901
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Shalin Shekhar Mangar commented on SOLR-13815:
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Probably too late for this comment but...
bq. Still... I don't think zookeeper can update multiple znodes at the same
time, so we might still have a very small window where we see something like
inactive/construction/construction. I'm not sure what the behavior of the
current code would be in that case.
Actually inactive/construction/construction is impossible because the shard
state is coming from the clusterstate which is a single znode updated
atomically. So the states will either be active/construction/construction or
active/recovery/recovery or inactive/active/active. No other state is possible.
> Live split can lose data
> ------------------------
>
> Key: SOLR-13815
> URL: https://issues.apache.org/jira/browse/SOLR-13815
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Yonik Seeley
> Priority: Major
> Fix For: 8.3
>
> Attachments: fail.191004_053129, fail.191004_093307
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> This issue is to investigate potential data loss during a "live" split (i.e.
> split happens while updates are flowing)
> This was discovered during the shared storage work which was based on a
> non-release branch_8x sometime before 8.3, hence the first steps are to try
> and reproduce on the master branch without any shared storage changes.
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