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https://issues.apache.org/jira/browse/NETBEANS-4696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17190368#comment-17190368
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Ernie Rael commented on NETBEANS-4696:
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There are two pull requests available.
# One seems very safe, don't block to get module name.
# The other has the html parser's indexer returning null if project opening is
not complete.
Simple preliminary tests don't show a problem. But the 2nd PR should be
carefully considered by someone who has some sense of the html parsing code.
Note that either change avoids the deadlock (at least that's the idea).
> NetBeans 12.1-beta1 sometimes hangs on open
> -------------------------------------------
>
> Key: NETBEANS-4696
> URL: https://issues.apache.org/jira/browse/NETBEANS-4696
> Project: NetBeans
> Issue Type: Bug
> Components: ide - Performance
> Affects Versions: 12.1
> Environment: Linux (Debian "Buster")
> OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.7+10)
> Reporter: Glenn Holmer
> Priority: Blocker
> Labels: deadlock, pull-requests-available
> Attachments: 12.1-vc1-thread-dump-orac.txt,
> nb12.1-beta1-thread-dump.png, nb12.1-beta1-thread-dump.txt,
> netbeans-12.1-thread-dump.txt
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
>
> NetBeans sometimes hangs on startup; the symptom is a stalled "Opening
> Projects" progress bar. I haven't been able to find a repro case, but I'm
> attaching a thread dump (from VisualVM) and screen shot.
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