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https://issues.apache.org/jira/browse/NETBEANS-6305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17463878#comment-17463878
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Jaroslav Tulach commented on NETBEANS-6305:
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Workaround pushed as https://github.com/apache/netbeans/pull/3375
> ProjectManager.find() return null for project dir - race between Git and
> Projects
> ---------------------------------------------------------------------------------
>
> Key: NETBEANS-6305
> URL: https://issues.apache.org/jira/browse/NETBEANS-6305
> Project: NetBeans
> Issue Type: Bug
> Components: projects - Generic Infrastructure, versioncontrol - Git
> Reporter: Svatopluk Dedic
> Assignee: Jaroslav Tulach
> Priority: Major
> Labels: VSNetBeans
> Attachments: git-project-race-strack.png, git-project-race1.png,
> git-project-race2.png
>
>
> I was trying to write some gradle projects tests using NbModuleSuite – the
> plan was to create a simpel gradle project (just buildscript), then open it
> as a project and inspect.
> To my surprise, calls like FileObject.createAndOpen or
> FileObject.getOuputStream() write (inside FS Atomic Action) resulted in the
> project directory not being recognized at all ! When I tried to debug the
> situation, a stop in the debugger (just a single thread) caused the project
> to be found magically.
> It turned to be a race between Git module (the workdir is created inside the
> source tree managed by git) and the Project system: Git module runs as
> extension to filesystems even inside FS Atomic Action (shown on a pictured
> stacktrace from debugger) and executes {*}FileOwnerQuery{*}{*}.findOwner{*}
> on the to-be-project directory before the buildscript is even created. The
> result of *not being a project* is then cached - and the cache is reset
> asynchronously when/after the project file is created.
> But the test manages to call ProjectManager.findProject sooner, while the
> cache still holds the negative result.
> One of the screenshots shows a debugger that stopped in a situation when the
> script file has been already created (a message in the output window), but
> project manager call invoked *after* the creation does not find a project.
> Uncommenting the m.invoke() line in HACK section will fix the situation -
> caches must be reset.
> The other screenshot is a debugger stopping when the to-be-project directory
> is first inspected, showing that the directory's is yet empty.
> // cc: [~entlicher]
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