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Details

Type: Bug
Resolution: Done
Priority: Minor
Fix Version/s: 5.1.2.Final, 6.0.0.Alpha1
Affects Version/s: 5.1.1.SP2
Component/s: Web Tier integration (JSF, JSP, EL and Servlet)
Labels:
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Steps to Reproduce:
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Using Open Liberty:

Create an app with a ServletContainerInitializer which throws an Error from its onStartup method.

Ensure the app contains a CDI bean

Ensure the server config contains both the servlet and cdi features

Deploy the app and start the server

The following error is seen in the log:
[24/08/2023, 16:17:17:872 BST] 0000003f com.ibm.ws.webcontainer.webapp E SRVE0285E: Exception caught while destroying context: java.lang.NullPointerException: Cannot invoke "org.jboss.weld.module.web.servlet.HttpContextLifecycle.contextDestroyed(jakarta.servlet.ServletContext)" because "this.lifecycle" is null
at org.jboss.weld.module.web.servlet.WeldInitialListener.contextDestroyed(WeldInitialListener.java:113)
at com.ibm.ws.cdi.web.factories.Weld50InitialListener.contextDestroyed(Weld50InitialListener.java:51)
at com.ibm.ws.webcontainer.webapp.WebApp.notifyServletContextDestroyed(WebApp.java:2700)
at com.ibm.ws.webcontainer.webapp.WebApp.destroy(WebApp.java:4036)
at com.ibm.ws.webcontainer.osgi.webapp.WebApp.destroy(WebApp.java:1470)
at com.ibm.ws.webcontainer.osgi.DynamicVirtualHost.stopWebApp(DynamicVirtualHost.java:510)
at com.ibm.ws.webcontainer.osgi.DynamicVirtualHost.startWebApp(DynamicVirtualHost.java:488)
at com.ibm.ws.webcontainer.osgi.DynamicVirtualHost.startWebApplication(DynamicVirtualHost.java:473)
at com.ibm.ws.webcontainer.osgi.WebContainer.startWebApplication(WebContainer.java:1206)
at com.ibm.ws.webcontainer.osgi.WebContainer.access$100(WebContainer.java:112)
at com.ibm.ws.webcontainer.osgi.WebContainer$3.run(WebContainer.java:994)
at com.ibm.ws.threading.internal.ExecutorServiceImpl$RunnableWrapper.run(ExecutorServiceImpl.java:247)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:857)
{{}}
Show
Using Open Liberty: Create an app with a ServletContainerInitializer which throws an Error from its onStartup method. Ensure the app contains a CDI bean Ensure the server config contains both the servlet and cdi features Deploy the app and start the server The following error is seen in the log: [24/08/2023, 16:17:17:872 BST] 0000003f com.ibm.ws.webcontainer.webapp E SRVE0285E: Exception caught while destroying context: java.lang.NullPointerException: Cannot invoke "org.jboss.weld.module.web.servlet.HttpContextLifecycle.contextDestroyed(jakarta.servlet.ServletContext)" because "this.lifecycle" is null at org.jboss.weld.module.web.servlet.WeldInitialListener.contextDestroyed(WeldInitialListener.java:113) at com.ibm.ws.cdi.web.factories.Weld50InitialListener.contextDestroyed(Weld50InitialListener.java:51) at com.ibm.ws.webcontainer.webapp.WebApp.notifyServletContextDestroyed(WebApp.java:2700) at com.ibm.ws.webcontainer.webapp.WebApp.destroy(WebApp.java:4036) at com.ibm.ws.webcontainer.osgi.webapp.WebApp.destroy(WebApp.java:1470) at com.ibm.ws.webcontainer.osgi.DynamicVirtualHost.stopWebApp(DynamicVirtualHost.java:510) at com.ibm.ws.webcontainer.osgi.DynamicVirtualHost.startWebApp(DynamicVirtualHost.java:488) at com.ibm.ws.webcontainer.osgi.DynamicVirtualHost.startWebApplication(DynamicVirtualHost.java:473) at com.ibm.ws.webcontainer.osgi.WebContainer.startWebApplication(WebContainer.java:1206) at com.ibm.ws.webcontainer.osgi.WebContainer.access$100(WebContainer.java:112) at com.ibm.ws.webcontainer.osgi.WebContainer$3.run(WebContainer.java:994) at com.ibm.ws.threading.internal.ExecutorServiceImpl$RunnableWrapper.run(ExecutorServiceImpl.java:247) at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) at java.base/java.lang.Thread.run(Thread.java:857) {{}}
Git Pull Request:
https://github.com/weld/core/pull/2875

Description

If something goes wrong early in the startup of a web app such that WeldInitialListener.contextInitialized is not called, it will throw a NullPointerException if WeldInitialListener.contextDestroyed is called.

This can only happen if the servlet container calls contextDestroyed without first calling contextInitialized, but we couldn't find anything in the servlet spec that gives a guarantee that this won't happen.

It also doesn't cause much harm because this only occurs if the app fails to start, but it does cause confusion to users debugging problems because the exception in the logs can look like the cause of the application startup failure rather than a symptom of it.

Can we add a check to WeldInitialListener.contextDestroyed to make sure lifecycle has been initialized before calling it?

Related Open Liberty issue: https://github.com/OpenLiberty/open-liberty/issues/26054

WeldInitialListener can throw NullPointerException if app fails to start

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