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https://issues.apache.org/jira/browse/ARTEMIS-2257?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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clebert suconic closed ARTEMIS-2257.
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Resolution: Fixed
Fix Version/s: 2.7.0
> Synchronize SharedEventLoopGroup shutdownGracefully to prevent race conditions
> ------------------------------------------------------------------------------
>
> Key: ARTEMIS-2257
> URL: https://issues.apache.org/jira/browse/ARTEMIS-2257
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Components: Broker
> Affects Versions: 2.6.4
> Reporter: yangwei
> Priority: Critical
> Fix For: 2.7.0
>
> Time Spent: 2h
> Remaining Estimate: 0h
>
> While thread a shutdowns shared event loop, between scheduling a task and set
> the shutdown reference thread b calls getInstance() and retrieves ready
> shutting down instance. Add synchronized block to fix the problem.
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