install Grails on Windows 10

[Moustafa Farouk]

I am trying to install Grails on Windows, which is an easy process. But, I got an error which I can't understand its reason?

I configured java home and grails home properly. Any idea why grails isn't installed?

C:\Users\admin>java -version
java version "14" 2020-03-17
Java(TM) SE Runtime Environment (build 14+36-1461)
Java HotSpot(TM) 64-Bit Server VM (build 14+36-1461, mixed mode, sharing)


C:\Users\admin>echo %grails_home%
C:\grails-4.0.0

C:\Users\admin>grails -version
java.lang.NoClassDefFoundError: Could not initialize class org.codehaus.groovy.vmplugin.v7.Java7
        at org.codehaus.groovy.vmplugin.VMPluginFactory.<clinit>(VMPluginFactory.java:43)
        at org.codehaus.groovy.reflection.GroovyClassValueFactory.<clinit>(GroovyClassValueFactory.java:35)
        at org.codehaus.groovy.reflection.ClassInfo.<clinit>(ClassInfo.java:107)
        at org.codehaus.groovy.reflection.ReflectionCache.getCachedClass(ReflectionCache.java:95)
        at org.codehaus.groovy.reflection.ReflectionCache.<clinit>(ReflectionCache.java:39)
        at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.registerMethods(MetaClassRegistryImpl.java:209)
        at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.<init>(MetaClassRegistryImpl.java:107)
        at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.<init>(MetaClassRegistryImpl.java:85)
        at groovy.lang.GroovySystem.<clinit>(GroovySystem.java:36)
        at org.codehaus.groovy.runtime.InvokerHelper.<clinit>(InvokerHelper.java:86)
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.bitwiseNegate(ScriptBytecodeAdapter.java:842)
        at org.grails.config.NavigableMap.<clinit>(NavigableMap.groovy)
        at org.grails.cli.GrailsCli.<clinit>(GrailsCli.groovy:77)
Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class org.codehaus.groovy.reflection.ReflectionCache
        at org.codehaus.groovy.runtime.dgmimpl.NumberNumberMetaMethod.<clinit>(NumberNumberMetaMethod.java:33)
        at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
        at java.base/java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:124)
        at java.base/jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:346)
        at java.base/java.lang.Class.newInstance(Class.java:604)
        at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.createMetaMethodFromClass(MetaClassRegistryImpl.java:257)
        at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.<init>(MetaClassRegistryImpl.java:110)
        at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.<init>(MetaClassRegistryImpl.java:85)
        at groovy.lang.GroovySystem.<clinit>(GroovySystem.java:36)
        at org.codehaus.groovy.runtime.InvokerHelper.<clinit>(InvokerHelper.java:86)
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.bitwiseNegate(ScriptBytecodeAdapter.java:842)
        at org.grails.config.NavigableMap.<clinit>(NavigableMap.groovy)
        at org.grails.cli.GrailsCli.<clinit>(GrailsCli.groovy:77)

[Daniel Leahy]

I would guess that grails 4 is not compatible with java 14, try it with java 8.

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[Jeff Scott Brown]

On 31 Mar 2020, at 8:31, Daniel Leahy wrote:

> I would guess that grails 4 is not compatible with java 14, try it
> with
> java 8.
>
>

8 would be fine but 11 is a more recent LTS version and obviously closer
to 14.



JSB

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Jeff Scott Brown
Partner and Practice Lead, Grails and Micronaut

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