Exception in thread “main” java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema

I’ve started fiddling in the world of mobile apps. Quite late you can say, but better late than ever! I’ve never had the need of it, as nowadays you really need a good idea to develop an app, otherwise there are already plenty of them. So I decided to try Nativescript with Vue.js (as I really like to study Vue more, too). Unfortunately when running tns setup I was stuck in the following error:

Step 4 of 12:
Allow the script to install Android SDK?
Note that if you type all you won't be prompted for subsequent installations
Installing Android SDK
Warning: Cask 'android-sdk' is already installed.

To re-install android-sdk, run:
  brew cask reinstall android-sdk
Set ANDROID_HOME=/usr/local/share/android-sdk
Set ANDROID_SDK_ROOT=/usr/local/share/android-sdk
Configuring your system for Android development... This might take some time, please, be patient.
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
	at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156)
	at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75)
	at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81)
	at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:73)
	at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48)
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
	... 5 more

I was getting mad, I tried everything I could find online but with no success. I wasn’t able to install the local environment to build for Android.

When I was ready to reinstall the whole OS and start from scratch I finally nailed the right search and got led to NS issue #1813. It doesn’t really look like the same error but I started reading and close to the bottom a lot of good feedback for @ssimpo‘s comment: basically he says JAVA env vars aren’t being passed to sudo. I immediately follow his advice and add

Defaults    env_keep += "ANDROID_HOME JAVA_HOME"

aaaand…. GO! The java exception has gone and the script was able to move over to installing the Android SDK.

I don’t know the root cause of the problem, as I don’t really enjoy java that much, but I’m happy I was able to finish setting up the environment! Now I can focus on trying to code an app.

Heading photo by Ryan Franco on Unsplash

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