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https://issues.apache.org/jira/browse/NETBEANS-3810?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17037032#comment-17037032
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Geertjan Wielenga commented on NETBEANS-3810:
---------------------------------------------

But I think some/many might not know how to do this. If we could provide these 
as instructions as a troubleshooting task after downloading, i.e., make it very 
clearly available on the downloads page, with as full and complete steps as 
possible (which hopefully you can/want to provide) that might solve this for 
some.

> Netbeans 11.3 does not report clearly certificate problems downloading javafx 
> and nb-javac
> ------------------------------------------------------------------------------------------
>
>                 Key: NETBEANS-3810
>                 URL: https://issues.apache.org/jira/browse/NETBEANS-3810
>             Project: NetBeans
>          Issue Type: Bug
>          Components: platform - Autoupdate
>    Affects Versions: 11.3
>         Environment: Windows 2016 server, Intel Xeon, 48G RAM.
> Network includes a proxy server with deep packet inspection and certificate 
> rewriting.
>            Reporter: Michele Costabile
>            Assignee: Michele Costabile
>            Priority: Minor
>              Labels: documentation, newbie
>             Fix For: 11.3
>
>         Attachments: Netbeans-11.3_bug.PNG, Netbeans-11.3_plugin-problem.PNG, 
> Netbeans-11.3_plugin.PNG
>
>
> NetBeans cannot get past installation of JavaFX and nb-javac on my 
> installation behind a company firewall. This problem was also in 11.2, but it 
> did not stop the IDE from working. It just kept on quietly asking for 
> nb-javac installation.
> 11.3, on the other hand does not seem to get past this problem. It keeps on 
> asking for installation of javafx and nb-javac and "Loading projects" never 
> comes to an end.
> I tested my proxy setting in options and I have a green light with system 
> settings and also with manual settings.
>  In any case I have never been able to install nb-javac and could not find 
> instructions on how to install manually the plugin.
> Note that my proxy has deep packet inspection and can create problems with 
> certificate verification on SSL.
>  
> EDIT: the request for installation is not an infinite loop. It appears to be 
> once for every open project. Hitting cancel more times, the progress bar in 
> the status bar eventually gets to 100%, but all the projects are reported 
> broken.
>  
> EDIT: as you can see from the comments below, it was really a problem with 
> certificates. When you are behind a proxy with deep inspection, certificates 
> are manipulated in such a way that you have to trust your company root 
> certificate to avoid failure in trust chains.
> This becomes a NetBeans installation problem because:
>  * Differently from other IDEs, NetBeans delegates everything to JDK, so it 
> requires that the trust problem is solved in the JDK, not in the IDE 
> preferences. The user should be able to find instructionsto resolve the 
> problem
>  * In 11.2 the IDE did not enter a loop waiting for nb'javac installation to 
> validate projects. It just gave up, causing less problems
>  * "Test connection" in proxy settings did not report certificate problems. A 
> full https connection should be tested
>  * The dialog box of nb-javac installation does not report certificate 
> problems, it rather dies without warning and the installation is stuck with a 
> progress bar at 100% and no notification other than "cannot resolve external 
> references ..." This hides the problem
>  
>  



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