NullPointerException on startup (MacOS)

[ThunderSOS]

Apache NetBeans version

Apache NetBeans 13

What happened

I get the following output when trying to start Netbeans from the command line (bin/netbeans) then startup exits and the IDE won't run.

WARNING: package sun.awt.X11 not in java.desktop
WARNING: package com.sun.java.swing.plaf.gtk not in java.desktop
java.lang.NullPointerException
at java.base/java.net.URLConnection$1.getContentTypeFor(URLConnection.java:313)
at java.base/java.net.URLConnection.guessContentTypeFromName(URLConnection.java:1464)
at java.base/sun.net.www.protocol.jar.JarURLConnection.getContentType(JarURLConnection.java:223)
at java.base/java.net.URLConnection.getContentHandler(URLConnection.java:1277)
at java.base/java.net.URLConnection.getContent(URLConnection.java:778)
at java.base/java.net.URL.getContent(URL.java:1150)
at org.openide.util.lookup.MetaInfServicesLookup.search(MetaInfServicesLookup.java:292)
at org.openide.util.lookup.MetaInfServicesLookup.beforeLookup(MetaInfServicesLookup.java:131)
at org.openide.util.lookup.MetaInfServicesLookup.beforeLookupResult(MetaInfServicesLookup.java:110)
at org.openide.util.lookup.AbstractLookup.lookup(AbstractLookup.java:458)
at org.openide.util.lookup.ProxyLookup$R.initResults(ProxyLookup.java:449)
at org.openide.util.lookup.ProxyLookup$R.myBeforeLookup(ProxyLookup.java:736)
at org.openide.util.lookup.ProxyLookup$R.computeResult(ProxyLookup.java:612)
at org.openide.util.lookup.ProxyLookup$R.allItems(ProxyLookup.java:596)
at org.openide.util.lookup.ProxyLookup$R.collImpl(ProxyLookup.java:699)
at org.openide.util.lookup.ProxyLookup$R.collectFires(ProxyLookup.java:645)
at org.openide.util.lookup.ProxyLookup.setLookups(ProxyLookup.java:228)
at org.openide.util.lookup.ProxyLookup.setLookups(ProxyLookup.java:184)
at org.netbeans.core.startup.MainLookup.changeLookups(MainLookup.java:193)
at org.netbeans.core.startup.MainLookup.doInitializeLookup(MainLookup.java:183)
at org.netbeans.core.startup.MainLookup.modulesClassPathInitialized(MainLookup.java:134)
at org.netbeans.core.startup.MainLookup.modulesClassPathInitialized(MainLookup.java:127)
at org.netbeans.core.startup.NbInstaller.loadImpl(NbInstaller.java:360)
at org.netbeans.core.startup.NbInstaller.access$000(NbInstaller.java:77)
at org.netbeans.core.startup.NbInstaller$1.run(NbInstaller.java:322)
at org.openide.filesystems.FileUtil$2.run(FileUtil.java:418)
at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:102)
at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:494)
at org.openide.filesystems.FileUtil.runAtomicAction(FileUtil.java:402)
at org.openide.filesystems.FileUtil.runAtomicAction(FileUtil.java:422)
at org.netbeans.core.startup.NbInstaller.load(NbInstaller.java:319)
at org.netbeans.ModuleManager.enable(ModuleManager.java:1457)
at org.netbeans.ModuleManager.enable(ModuleManager.java:1254)
at org.netbeans.core.startup.ModuleList.installNew(ModuleList.java:315)
at org.netbeans.core.startup.ModuleList.trigger(ModuleList.java:251)
at org.netbeans.core.startup.ModuleSystem.restore(ModuleSystem.java:298)
at org.netbeans.core.startup.Main.getModuleSystem(Main.java:156)
at org.netbeans.core.startup.Main.getModuleSystem(Main.java:125)
at org.netbeans.core.startup.Main.start(Main.java:282)
at org.netbeans.core.startup.TopThreadGroup.run(TopThreadGroup.java:98)
at java.base/java.lang.Thread.run(Thread.java:834)

How to reproduce

Well I'd say just install manually from the zip file and try to run but I'm guessing this works for you...

Did this work correctly in an earlier version?

Apache NetBeans 12.3 or earlier

Operating System

MacOS

JDK

JDK11java version "11.0.3" 2019-04-16 LTS Java(TM) SE Runtime Environment 1Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.3+12-LTS, mixed mode)

Apache NetBeans packaging

Apache NetBeans binary zip

Anything else

Every time I try to start it. Curiously it worked OK initially then stopped after a day or two. Tried to reinstall etc but just can't make it work ever since.

Are you willing to submit a pull request?

No

Code of Conduct

Yes

[lkishalmi]

I think your NetBeans USER directory has been corrupted. You shall delete the user and cache directory. It should be under $HOME/.netbeans and $HOME/.cache/netbeans (at least on Linux), for the zip distribution.

[ThunderSOS]

OK, I don't have those directories on Mac.

[neilcsmith-net]

The About window will show you the location of your user and cache directories.

[ThunderSOS]

I found it eventually at ~/Libraryt/Caches/Netbeans and yep seems to have done the trick.

[neilcsmith-net]

Great! I'll close this. If it recurs, please report back, especially if there's any further insight on what the trigger for it is.

[ThunderSOS]

It has recurred but I can't offer any insight into what's causing the corruption unfortunately.  Sent from Yahoo Mail on Android On Wed, 30 Mar 2022 at 16:26, Neil C ***@***.***> wrote: Great! I'll close this. If it recurs, please report back, especially if there's any further insight on what the trigger for it is. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: ***@***.***>