GlassFish version: 5.1.0
Windows version: 10
Motivation
You may have several version of the JDK installed on your machine. By default you may be using JDK 11 or even 13, but GlassFish requires JDK 8.
Issue
Running asadmin generates the following error
Exception in thread “main” java.lang.NullPointerException
at com.sun.enterprise.module.common_impl.AbstractModulesRegistryImpl.initializeServiceLocator(AbstractModulesRegistryImpl.java:128)
at com.sun.enterprise.module.common_impl.AbstractModulesRegistryImpl.newServiceLocator(AbstractModulesRegistryImpl.java:120)
at com.sun.enterprise.module.common_impl.AbstractModulesRegistryImpl.createServiceLocator(AbstractModulesRegistryImpl.java:194)
at com.sun.enterprise.module.common_impl.AbstractModulesRegistryImpl.createServiceLocator(AbstractModulesRegistryImpl.java:200)
at com.sun.enterprise.module.single.StaticModulesRegistry.createServiceLocator(StaticModulesRegistry.java:64)
at com.sun.enterprise.admin.cli.CLIContainer.getServiceLocator(CLIContainer.java:193)
at com.sun.enterprise.admin.cli.CLIContainer.getLocalCommand(CLIContainer.java:231)
at com.sun.enterprise.admin.cli.CLICommand.getCommand(CLICommand.java:207)
at com.sun.enterprise.admin.cli.AdminMain.executeCommand(AdminMain.java:347)
at com.sun.enterprise.admin.cli.AdminMain.doMain(AdminMain.java:282)
at org.glassfish.admin.cli.AsadminMain.main(AsadminMain.java:33)
Fix
Edit: ~\glassfish\config\asenv.bat
Assuming JDK 8 installation path is C:\Program Files\Java\jdk1.8.0_241
Add the line:
set AS_JAVA=C:\Program Files\Java\jdk1.8.0_241
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