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https://issues.apache.org/jira/browse/SOLR-8255?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alan Woodward resolved SOLR-8255.
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Resolution: Fixed
> MiniSolrCloudCluster doesn't use a thread-safe list for its jetties
> -------------------------------------------------------------------
>
> Key: SOLR-8255
> URL: https://issues.apache.org/jira/browse/SOLR-8255
> Project: Solr
> Issue Type: Bug
> Reporter: Alan Woodward
> Assignee: Alan Woodward
>
> MiniSolrCloudCluster uses a LinkedList<> to hold its jetties. However,
> multi-threaded startup can break this because the list isn't thread safe. We
> should use CopyOnWriteArrayList instead.
> See for example
> http://jenkins.thetaphi.de/job/Lucene-Solr-trunk-Linux/14819/, which starts
> up 5 nodes but then only has 4 entries in its jetty list, causing assertion
> errors and thread leaks.
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