vaadin 15 and openliberty 20.0.0.x throws javax.servlet.ServletException: java.lang.reflect.InvocationTargetException

Starting the example project from https://vaadin.com/start/latest with openliberty ( https://openliberty.io/ ) results in an exception.

• (Open Liberty 20.0.0.4/wlp-1.0.39.cl200420200401-1714) on OpenJDK 64-Bit Server VM, version 13.0.2+6-MTS (en_US)
• Vaadin 15.0.6
• Ubuntu 20.04

see attachted example project:

cdi-java-ee-vadin15.zip

run

npm install
mvn clean package liberty:run

results in:

[INFO] [WARNING ] CWWWC0001W: The [com.vaadin.flow.server.startup.DevModeInitializer@16332e8e] ServletContainerInitializer, located in the following application [dada Project], produced the following error while invoking the onStartup method: [javax.servlet.ServletException: java.lang.reflect.InvocationTargetException
[INFO]  at com.vaadin.flow.server.startup.ClassLoaderAwareServletContainerInitializer.onStartup(ClassLoaderAwareServletContainerInitializer.java:99)
[INFO]  at com.ibm.ws.webcontainer.webapp.WebApp.initializeServletContainerInitializers(WebApp.java:2530)
[INFO]  at [internal classes]
[INFO] Caused by: java.lang.reflect.InvocationTargetException
[INFO]  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[INFO]  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[INFO]  at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[INFO]  at java.base/java.lang.reflect.Method.invoke(Method.java:567)
[INFO]  at com.vaadin.flow.server.startup.ClassLoaderAwareServletContainerInitializer.onStartup(ClassLoaderAwareServletContainerInitializer.java:94)
[INFO]  ... 2 more
[INFO] Caused by: java.lang.IllegalStateException: There are neither 'flow-build-info.json' nor 'webpack.config.js' file available in the project/working directory. Ensure 'webpack.config.js' is present or trigger creation of 'flow-build-info.json' via running 'prepare-frontend' Maven goal.
[INFO]  ... 14 more
[INFO] ]
[INFO] [err] [Default Executor-thread-6] INFO com.vaadin.cdi.CdiServletDeployer - Automatically deploying CDI Vaadin servlet to /*
[INFO] [ERROR   ] SRVE0283E: Exception caught while initializing context: java.lang.IllegalStateException: There are neither 'flow-build-info.json' nor 'webpack.config.js' file available in the project/working directory. Ensure 'webpack.config.js' is present or trigger creation of 'flow-build-info.json' via running 'prepare-frontend' Maven goal.
[INFO]  at com.vaadin.flow.server.DeploymentConfigurationFactory.verifyMode(DeploymentConfigurationFactory.java:436)
[INFO]  at com.vaadin.flow.server.DeploymentConfigurationFactory.readBuildInfo(DeploymentConfigurationFactory.java:186)
[INFO]  at com.vaadin.flow.server.DeploymentConfigurationFactory.createInitParameters(DeploymentConfigurationFactory.java:165)
[INFO]  at com.vaadin.flow.server.DeploymentConfigurationFactory.createPropertyDeploymentConfiguration(DeploymentConfigurationFactory.java:127)
[INFO]  at com.vaadin.flow.server.startup.ServletDeployer$StubServletConfig.createDeploymentConfiguration(ServletDeployer.java:184)
[INFO]  at com.vaadin.flow.server.startup.ServletDeployer.lambda$getServletConfigurations$0(ServletDeployer.java:242)
[INFO]  at java.base/java.util.Optional.ifPresent(Optional.java:176)
[INFO]  at com.vaadin.flow.server.startup.ServletDeployer.getServletConfigurations(ServletDeployer.java:241)
[INFO]  at com.vaadin.flow.server.startup.ServletDeployer.contextInitialized(ServletDeployer.java:219)
[INFO]  at com.vaadin.flow.server.startup.ServletContextListeners.contextInitialized(ServletContextListeners.java:42)
[INFO]  at com.ibm.ws.webcontainer.webapp.WebApp.notifyServletContextCreated(WebApp.java:2417)
[INFO]  at [internal classes]

[mehdi-vaadin]

@ollin thanks for the update 😃

[ollin]

@mehdi-vaadin live reload in openliberty works with this simple example. I didn’t test advanced features. But so far, so good… 😃