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https://issues.apache.org/jira/browse/SOLR-8777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15176886#comment-15176886
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Scott Blum commented on SOLR-8777:
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Oh yuck, looks like jetty controls the ordering, and doesn't bind the port
until after all the ServletFilters are initialized, which is what ultimately
starts up ZkController.
> Duplicate Solr process can cripple a running process
> ----------------------------------------------------
>
> Key: SOLR-8777
> URL: https://issues.apache.org/jira/browse/SOLR-8777
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Affects Versions: 5.3.1
> Reporter: Shalin Shekhar Mangar
>
> Thanks to [~mewmewball] for catching this one.
> Accidentally executing the same instance of Solr twice causes the second
> start instance to die with an "Address already in use", but not before
> deleting the first instance's live_node entry, emitting "Found a previous
> node that still exists while trying to register a new live node <node> -
> removing existing node to create another".
> The second start instance dies and its ephemeral node is then removed,
> causing /live_nodes/<node> to be empty since the first start instance's
> live_node was deleted by the second.
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