errael commented on issue #4652:
URL: https://github.com/apache/netbeans/issues/4652#issuecomment-1252396709
Fresh unzip of NetBeans, no -J-D or other mods.
/ref, /home, /junk are different filesystems
```
$ ls -l /ref/openjdk/java_home
lrwxrwxrwx 1 err err 6 Sep 11 19:16 /ref/openjdk/java_home -> jdk-11
err@harmony:~/.nb/15-startup-crash
$ ls -l /ref/openjdk/jdk-11
lrwxrwxrwx 1 err err 33 Aug 22 16:58 /ref/openjdk/jdk-11 ->
/junk/BACK_REF/openjdk/jdk-11.0.2
```
dorun:
```
bash
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/bin/netbeans \
--jdkhome /ref/openjdk/java_home
\
--userdir /home/err/.nb/15-startup-crash/udir
exit
```
After `bash dorun`, the dialog `Confirm Import Settings` comes up. Click No.
Following copied from console
```
$ bash dorun
WARNING: package com.apple.eio not in java.desktop
java.lang.NullPointerException
at
java.base/java.net.URLConnection$1.getContentTypeFor(URLConnection.java:313)
at
java.base/java.net.URLConnection.guessContentTypeFromName(URLConnection.java:1464)
at
java.base/sun.net.www.protocol.jar.JarURLConnection.getContentType(JarURLConnection.java:223)
at
java.base/java.net.URLConnection.getContentHandler(URLConnection.java:1277)
at java.base/java.net.URLConnection.getContent(URLConnection.java:778)
at java.base/java.net.URL.getContent(URL.java:1150)
at
org.openide.util.lookup.MetaInfServicesLookup.search(MetaInfServicesLookup.java:293)
at
org.openide.util.lookup.MetaInfServicesLookup.beforeLookup(MetaInfServicesLookup.java:132)
at
org.openide.util.lookup.MetaInfServicesLookup.beforeLookupResult(MetaInfServicesLookup.java:111)
at
org.openide.util.lookup.AbstractLookup.lookup(AbstractLookup.java:458)
at
org.openide.util.lookup.ProxyLookup$R.lookupChange(ProxyLookup.java:519)
at org.openide.util.lookup.ProxyLookup.setData(ProxyLookup.java:372)
at org.openide.util.lookup.ProxyLookup.setLookups(ProxyLookup.java:211)
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.moduleClassLoadersUp(MainLookup.java:107)
at
org.netbeans.core.startup.MainLookup.systemClassLoaderChanged(MainLookup.java:95)
at org.netbeans.core.startup.ModuleSystem.init(ModuleSystem.java:98)
at org.netbeans.core.startup.Main.getModuleSystem(Main.java:162)
at org.netbeans.core.startup.Main.getModuleSystem(Main.java:142)
at org.netbeans.core.startup.Main.start(Main.java:299)
at org.netbeans.core.startup.TopThreadGroup.run(TopThreadGroup.java:98)
at java.base/java.lang.Thread.run(Thread.java:834)
err@harmony:~/.nb/15-startup-crash
```
And messages.log
```
-------------------------------------------------------------------------------
>Log Session: Tuesday, September 20, 2022 at 6:50:35 AM Pacific Daylight Time
>System Info:
Product Version = Apache NetBeans IDE 15
Operating System = Linux version 5.19.0-76051900-generic running on
amd64
Java; VM; Vendor = 11.0.2; OpenJDK 64-Bit Server VM 11.0.2+9;
Oracle Corporation
Runtime = OpenJDK Runtime Environment 11.0.2+9
Java Home = /junk/BACK_REF/openjdk/jdk-11.0.2
System Locale; Encoding = en_US (nb); UTF-8
Home Directory = /home/err
Current Directory = /home/err/.nb/15-startup-crash
User Directory = /home/err/.nb/15-startup-crash/udir
Cache Directory = /home/err/.nb/15-startup-crash/udir/var/cache
Installation =
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/nb
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/ergonomics
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/ide
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/extide
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/java
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/apisupport
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/webcommon
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/websvccommon
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/enterprise
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/profiler
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/php
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/harness
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/cpplite
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/groovy
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/javafx
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/platform
Boot & Ext. Classpath =
Application Classpath =
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/platform/lib/boot.jar:/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/platform/lib/org-openide-modules.jar:/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/platform/lib/org-openide-util.jar:/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/platform/lib/org-openide-util-lookup.jar:/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/platform/lib/org-openide-util-ui.jar
Startup Classpath =
/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/platform/core/asm-commons-9.3.jar:/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/platform/core/org-netbeans-libs-asm.jar:/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/platform/core/org-openide-filesystems.jar:/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/platform/core/asm-tree-9.3.jar:/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/platform/core/core-base.jar:/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/platform/core/core.jar:/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/platform/core/asm-9.3.jar:/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/platform/core/org-openide-filesystems-compat8.jar:/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/nb/core/org-netbeans-upgrader.jar:/junk/BACK_REF/nb/NetBeans/NetBeans-15-startup-crash/netbeans/nb/core/locale/core_nb.jar
-------------------------------------------------------------------------------
```
```
$ tree udir/
udir/
├── config
└── var
├── cache
│ └── lastModified
│ └── all-checksum.txt
├── imported
└── log
└── messages.log
```
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