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https://issues.apache.org/jira/browse/MYFACES-4066?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15523924#comment-15523924
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Bill Lucy commented on MYFACES-4066:
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I've attached a patch - synchronizing getFlowDefinitions - for review.
> FlowBuilderFactoryBean Concurrency Issue
> ----------------------------------------
>
> Key: MYFACES-4066
> URL: https://issues.apache.org/jira/browse/MYFACES-4066
> Project: MyFaces Core
> Issue Type: Bug
> Affects Versions: 2.2.11
> Environment: WebSphere Liberty
> Reporter: Bill Lucy
> Assignee: Bill Lucy
> Priority: Minor
> Attachments: MYFACES-4066.patch
>
>
> I've come accross a concurrency issue in
> org.apache.myfaces.flow.cdi.FlowBuilderFactoryBean.getFlowDefinitions(). If
> multiple applications (with programmatic flows) are starting up
> simultaneously, it's possible that the two responsible threads can
> concurrently modify the shared object FlowBuilderFactoryBean.flowDefinitions.
> That can result in the flowDefinitions for one of the applications not being
> processed.
> Synchronizing the getFlowDefinitions() method is the simplest fix for this
> issue.
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