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https://issues.apache.org/jira/browse/NETBEANS-1620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16677811#comment-16677811
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Geertjan Wielenga commented on NETBEANS-1620:
---------------------------------------------
"Install/reload in Development IDE" may not always work, i.e., advisable to run
the module in a new instance, i.e., right-click the module and choose Run.
> Reloading a module in Development IDE unloads compatibilty layers
> -----------------------------------------------------------------
>
> Key: NETBEANS-1620
> URL: https://issues.apache.org/jira/browse/NETBEANS-1620
> Project: NetBeans
> Issue Type: Bug
> Affects Versions: 10.0
> Environment: Arch Linux
> JDK 11
> NetBeans 10.0vc3
> Reporter: Peter Nabbefeld
> Priority: Major
>
> Unloading of the compatibilty layers results in the IDE partially hanging.
> From IDE.log (logged while reloading module):
> INFO [org.netbeans.core.startup.NbEvents]: Turning on modules:
> org.netbeans.modules.pm.DocsTree [1.0 1.0-20181107 201811070731]
> WARNING [org.openide.filesystems.Ordering]: Not all children in Menu/Window/
> marked with the position attribute:
> [org-netbeans-modules-pm-docstree-PMTopComponent.shadow], but some are:
> [org-netbeans-modules-project-ui-logical-tab-action.shadow,
> org-netbeans-modules-project-ui-physical-tab-action.shadow,
> org-netbeans-modules-favorites-View.shadow,
> org-netbeans-core-ide-ServicesTabAction.shadow,
> org-netbeans-modules-navigator-ShowNavigatorAction.shadow,
> org-netbeans-modules-tasklist-ui-TaskListAction.shadow,
> org-netbeans-modules-tasks-ui-DashboardTopComponent.shadow,
> org-netbeans-core-io-ui-IOWindowAction.shadow,
> SwitchToRecentDocumentAction.shadow, Debug, Profile, Web, Tools,
> Separator3.instance, ConfigureWindow,
> org-netbeans-core-windows-actions-ResetWindowsAction.shadow,
> Separator4.instance, CloseWindowAction.shadow,
> CloseAllDocumentsAction.shadow, CloseAllButThisAction.shadow,
> GroupsMenuAction.shadow, DocumentsAction.shadow]
> INFO [org.netbeans.core.startup.NbEvents]: Turning off modules:
> org.netbeans.api.progress.compat8 [1.50.1
> incubator-netbeans-release-365-on-20181105]
> org.netbeans.modules.java.source.compat8 [9.6.1
> incubator-netbeans-release-365-on-20181105]
> org.netbeans.modules.pm.DocsTree [1.0 1.0-20181107 201811070731]
> org.netbeans.modules.project.ant.compat8/1 [1.70.1
> incubator-netbeans-release-365-on-20181105]
> org.openide.execution.compat8 [9.5.1
> incubator-netbeans-release-365-on-20181105]
> WARNING [org.openide.util.lookup.MetaInfServicesLookup]:
> org.netbeans.modules.java.source.parsing.JavacParser$TreeLoaderRegistry could
> not be found in SystemClassLoader[671 modules]
> WARNING [org.openide.util.lookup.MetaInfServicesLookup]:
> org.netbeans.modules.java.source.parsing.JavacParser$ContextEnhancer could
> not be found in SystemClassLoader[671 modules]
> WARNING [org.openide.util.lookup.MetaInfServicesLookup]:
> org.netbeans.modules.java.source.tasklist.CompilerSettings could not be found
> in SystemClassLoader[671 modules]
> WARNING [org.openide.util.lookup.MetaInfServicesLookup]:
> org.netbeans.modules.java.source.parsing.JavacParser$DuplicateClassRegistry
> could not be found in SystemClassLoader[671 modules]
> WARNING [org.openide.util.lookup.MetaInfServicesLookup]:
> org.netbeans.modules.java.source.parsing.JavacParser$TreeLoaderRegistry could
> not be found in SystemClassLoader[671 modules]
> WARNING [org.openide.util.lookup.MetaInfServicesLookup]:
> org.netbeans.modules.java.source.parsing.JavacParser$ContextEnhancer could
> not be found in SystemClassLoader[671 modules]
> WARNING [org.openide.util.lookup.MetaInfServicesLookup]:
> org.netbeans.modules.java.source.tasklist.CompilerSettings could not be found
> in SystemClassLoader[671 modules]
> WARNING [org.openide.util.lookup.MetaInfServicesLookup]:
> org.netbeans.modules.java.source.parsing.JavacParser$DuplicateClassRegistry
> could not be found in SystemClassLoader[671 modules]
> INFO [org.netbeans.core.startup.NbEvents]: Turning on modules:
> org.netbeans.modules.pm.DocsTree [1.0 1.0-20181107 201811070731]
>
> As You can see, compatibility modules are unloaded but not reloaded (IMO,
> they shouldn't even get unloaded).
> Since this, IDE doesn't provide Java functionality any more, CNFEs are
> displayed, and I cannot even close NetBeans.
> The source code of my modules can be found at
> [https://github.com/pnabbefeld/NbProjectManagement]
> For installation of the module, You'll need to remove the JAXB dependencies
> (but, please, don't remove the antlr build step and its dependency, otherwise
> the module won't compile).
> However, this bug should occur with any external module.
>
> So, to reproduce this bug, try the following:
> # Create/Load a NetBeans module (I'm using source/target 1.8, because AFAIK
> it's not possible to use newer Java platforms for module development).
> # Build it, install it into NetBeans ("Install/reload in Development IDE").
> First time this will work, as no unloading is done.
> # Reload it. Now, the compatibility layers are unloaded, the above described
> behavior can be seen.
> If You're running the module, everything will be okay, because the "slave"
> IDE already starts with the updated version of the module.
>
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