Custom SessionStore throws ClassNotFoundException #1297
Description
Play Framework version: 1.5.2
OS: MacOS 10.14.3
IntelliJ IDEA 2018.3.5 (Ultimate Edition)
Google App Engine: 1.9.71
JDK: Oracle 1.8.0_201
java version "1.8.0_201"
Java(TM) SE Runtime Environment (build 1.8.0_201-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode)
I have a Play 1.5 app running on Google App Engine Standard. I'm trying to customize my session store with this simple class:
package overrides;
import play.mvc.CookieSessionStore;
public class CustomCookieSessionStore extends CookieSessionStore {
}And in my application.conf file:
application.session.storeClass=overrides.CustomCookieSessionStoreEverything runs fine when:
- running the app from IntelliJ IDEA ("Application" configuration type, with
play.server.Serveras "Main class")
It fails when:
- running the app from the command line with
play run - building the app as an exploded war, and deploying it on an App Engine Standard server (both on the local App Engine development server and on Google's servers)
Here is the output of play run:
16:22:10,998 INFO ~ Storing sessions using overrides.CustomCookieSessionStore
16:22:11,001 ERROR ~ Failed to handle invocation exception by plugin play.data.validation.ValidationPlugin
java.lang.NoClassDefFoundError: Could not initialize class play.mvc.Scope
at play.data.validation.ValidationPlugin.clear(ValidationPlugin.java:192)
at play.data.validation.ValidationPlugin.onInvocationException(ValidationPlugin.java:99)
at play.plugins.PluginCollection.onInvocationException(PluginCollection.java:570)
at play.Invoker$Invocation.onException(Invoker.java:266)
at play.Invoker$Invocation.run(Invoker.java:334)
at play.server.PlayHandler$NettyInvocation.run(PlayHandler.java:252)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
16:22:11,817 ERROR ~
@7b4dn7if3
Internal Server Error (500) for request GET /
Oops: ExceptionInInitializerError
Unexpected error : Unexpected Error, caused by exception ExceptionInInitializerError: null
play.exceptions.UnexpectedException: Unexpected Error
at play.Invoker$Invocation.onException(Invoker.java:270)
at play.Invoker$Invocation.run(Invoker.java:334)
at Invocation.HTTP Request(Play!)
Caused by: java.lang.ExceptionInInitializerError
at play.mvc.Scope$Session.restore(Scope.java:179)
at play.mvc.ActionInvoker.initActionContext(ActionInvoker.java:102)
at play.mvc.ActionInvoker.resolve(ActionInvoker.java:61)
... 1 more
Caused by: play.exceptions.UnexpectedException: Cannot create instance of overrides.CustomCookieSessionStore
at play.mvc.Scope.createSessionStore(Scope.java:49)
at play.mvc.Scope.<clinit>(Scope.java:36)
... 4 more
Caused by: java.lang.RuntimeException: Cannot instantiate overrides.CustomCookieSessionStore
at play.inject.Injector.getBeanOfType(Injector.java:27)
at play.mvc.Scope.createSessionStore(Scope.java:46)
... 5 more
Caused by: java.lang.ClassNotFoundException: overrides.CustomCookieSessionStore
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at play.inject.Injector.getBeanOfType(Injector.java:25)
... 6 more
The Injector class is trying to load CustomCookieSessionStore with this line:
return getBeanOfType((Class<T>) Class.forName(className));In this case, Class.forName is using the classloader of the Injector class, which is not the same as Play.classloader. My custom class is present on Play.classloader, but not on Injector's.
Am I missing something?