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rwth-acis / las2peer

A Java-based decentralized framework for distributing community services in a peer-to-peer infrastructure.
https://las2peer.org
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[BUG] ResourceNotFoundException when requesting Resource with String[] or List<String> as attribute #129

Open Siminho opened 2 years ago

Siminho commented 2 years ago
  1. Summary - When deploying the Distributed Noracle Application to the developer las2peer network, a ResourceNotFoundException is throwd when calling an API Endpoint with a Object as Response, that has a String[] or List attribut. Locally, this problem does not occur.
  2. Bug Details
    1. Where? - In LoadedJarLibrary.java, when calling getResourceAsUrl(...). Can be reproduced with Noracle (https://noracle.tech4comp.dbis.rwth-aachen.de/). The user only needs to login. After that, the error can be seen in the network tab in the developer tools.
    2. When?/How often? - When requesting an Noracle (https://git.tech4comp.dbis.rwth-aachen.de/distributed-noracle/agents/{agentId}/spacesubscriptions), the Response is an object, that has a String[] attribute as member.
Siminho commented 2 years ago

Here is the call stack from the corresponding las2peer service: ... Request failed: i5.las2peer.api.execution.ServiceInvocationFailedException: Re-serialization failed i5.las2peer.api.execution.ServiceInvocationFailedException: Re-serialization failed at i5.las2peer.execution.ExecutionContext.invokeWithAgent(ExecutionContext.java:176) at i5.las2peer.execution.ExecutionContext.invoke(ExecutionContext.java:131) at i5.las2peer.services.noracleService.resources.AgentsResource.getSpaceSubscriptions(AgentsResource.java:56) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:52) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:124) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:167) at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:219) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:79) at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:475) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:397) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:81) at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:255) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244) at org.glassfish.jersey.internal.Errors.process(Errors.java:292) at org.glassfish.jersey.internal.Errors.process(Errors.java:274) at org.glassfish.jersey.internal.Errors.process(Errors.java:244) at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265) at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:234) at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:684) at i5.las2peer.restMapper.RESTService.handle(RESTService.java:148) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at i5.las2peer.execution.ServiceHelper.execute(ServiceHelper.java:139) at i5.las2peer.security.ServiceAgentImpl.invoke(ServiceAgentImpl.java:453) at i5.las2peer.security.ServiceAgentImpl.lambda$handle$0(ServiceAgentImpl.java:479) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) at java.base/java.lang.Thread.run(Thread.java:831) Caused by: java.lang.ClassNotFoundException: The class [Ljava.lang.String; could not be loaded by this classloader! at i5.las2peer.classLoaders.ServiceClassLoader.findClass(ServiceClassLoader.java:77) at i5.las2peer.classLoaders.ServiceClassLoader.loadClass(ServiceClassLoader.java:113) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:519) at i5.las2peer.execution.ExecutionContext$1.resolveClass(ExecutionContext.java:171) at java.base/java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:2022) at java.base/java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1889) at java.base/java.io.ObjectInputStream.readArray(ObjectInputStream.java:2084) at java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1694) at java.base/java.io.ObjectInputStream$FieldValues.(ObjectInputStream.java:2571) at java.base/java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2429) at java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2229) at java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1706) at java.base/java.io.ObjectInputStream$FieldValues.(ObjectInputStream.java:2571) at java.base/java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2429) at java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2229) at java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1706) at java.base/java.io.ObjectInputStream.readObject(ObjectInputStream.java:496) at java.base/java.io.ObjectInputStream.readObject(ObjectInputStream.java:454) at java.base/java.util.ArrayList.readObject(ArrayList.java:899) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at java.base/java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1224) at java.base/java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2395) at java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2229) at java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1706) at java.base/java.io.ObjectInputStream.readObject(ObjectInputStream.java:496) at java.base/java.io.ObjectInputStream.readObject(ObjectInputStream.java:454) at i5.las2peer.execution.ExecutionContext.invokeWithAgent(ExecutionContext.java:174) ... 35 more Caused by: i5.las2peer.classLoaders.libraries.ResourceNotFoundException: the resource '[Ljava/lang/String;.class' could not be loaded from 'service/i5.las2peer.services.noracleService-1.0.0.jar' at i5.las2peer.classLoaders.libraries.LoadedJarLibrary.getResourceAsUrl(LoadedJarLibrary.java:45) at i5.las2peer.classLoaders.libraries.LoadedJarLibrary.getResourceAsStream(LoadedJarLibrary.java:60) at i5.las2peer.classLoaders.libraries.LoadedLibrary.getResourceAsBinary(LoadedLibrary.java:94) at i5.las2peer.classLoaders.ServiceClassLoader.getResourceContent(ServiceClassLoader.java:53) at i5.las2peer.classLoaders.ServiceClassLoader.findClass(ServiceClassLoader.java:62) ... 64 more ...

lakhoune commented 2 years ago

I faintly remember having the same issue when I did my bachelor thesis. I think it is due to the serialization issue for Objects. I think the issue occurs when you make an RMI to a method that returns an Object. At least this would at least explain why it is working locally (because you don't need to call a service on another node)