Laszlo Kishalmi commented on NETBEANS-2428:

I'd recommend uninstall NetBeans from apt and try the snap package instead. It 
is just: snap install netbeans --classic
Or check out: [https://snapcraft.io/netbeans]


> Unhandled Exception and Broken Navigator
> ----------------------------------------
>                 Key: NETBEANS-2428
>                 URL: https://issues.apache.org/jira/browse/NETBEANS-2428
>             Project: NetBeans
>          Issue Type: Bug
>          Components: java - Navigation
>    Affects Versions: 10.0
>         Environment: Ubuntu 18.04 x86_64, Linux 4.18.0-17
> OpenJDK 11.0.2
>            Reporter: Matt Mead
>            Priority: Major
>              Labels: Exception
>         Attachments: messages.log
> Having installed OpenkJDK 11 and Netbeans 10 on my relatively clean (new 
> install) Ubuntu 18.04 laptop via apt (packages openjdk-11-jdk and netbeans, 
> from the ubuntu repositories). I have been experiencing some very bizarre 
> issues:
>  * *The Navigator window doesn't load any symbols when I open a file, it just 
> says "Please Wait" - this is accompanied by an exception which will be 
> included in the attached log.*
>  * Line breakpoints cannot be submitted at all, the IDE claims they are not 
> positioned in a class, when they are. I have only tested exception 
> breakpoints, which do work - I haven't tried any other types.
>  * I cannot create new projects - the wizard opens up, I follow the steps and 
> click finish and the window hangs and an exception notification appears.
> I have only attached a log for the issue highlighted in bold. Please let me 
> know if you would like me to reproduce and attach logs for the other error 
> either here or in a new issue.
> From what I can gather from the stack trace, it seems to be some sort of 
> parsing related issue. That fits with the other two issues, not being able to 
> detect that breakpoints are in a class and for project creation the error 
> trace usually says something about failed compilation.
> Having looked online and at recent issues here I don't see anyone else having 
> major issues similar to mine, bar a few bug reports from over 10 years ago! 
> That might make you think its a problem with my computer (maybe it is), but 
> when I download Netbeans 11 manually and 'install' it in my home directory it 
> works like a charm, no issues at all.
> Please let me know if you need me to clarify anything or provide additional 
> information and attachments.

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