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https://issues.apache.org/jira/browse/GROOVY-12565?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul King resolved GROOVY-12565.
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Fix Version/s: 7.0.0-alpha-1
Resolution: Fixed
> groovy-lsp LspFixture throws ConcurrentModificationException while the
> compile thread publishes
> -----------------------------------------------------------------------------------------------
>
> Key: GROOVY-12565
> URL: https://issues.apache.org/jira/browse/GROOVY-12565
> Project: Groovy
> Issue Type: Test
> Reporter: Scott Murphy Heiberg
> Assignee: Daniel Sun
> Priority: Major
> Fix For: 7.0.0-alpha-1
>
>
> {{LspFixture}} records the client notifications in a
> {{Collections.synchronizedList}} and plain lists. The server's debounced
> compile thread adds to them while a test iterates them, e.g.
> {{publishedParams*.uri}}, and the iterator of a synchronized list is not
> synchronized.
> {{GroovyLanguageServerTest.publishDiagnosticsIncludeVersionAndClearRemovedUris}}
> failed on CI with a ConcurrentModificationException when the background
> compile published during that read, after the publishing itself was
> serialized.
> Fix: record into {{CopyOnWriteArrayList}}s, whose iterators read a snapshot.
> PR: https://github.com/apache/groovy/pull/3094
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