[appengine-java] Re: Security Exception using Guice Servlet
I have the answer. With help from the folks at Google I was told that the underlying problem was a ClassNotFoundException for isSerializable from the GWT toolkit. This explains why my other app worked ok, because it contained the GWT jar. This also means that the true problem was being masked by the Appengine and this was the cause of my woe. Apparently very soon they will be allowing the root cause for these kinds of problems to be seen so that this masking of errors won't occur in the future. FTW! Thanks Google team, I'm happy to be moving forward again. -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Security Exception using Guice Servlet
The plot thickens. I just uploaded another version of my app with similar code, including the offending MappingUtils class. This version has no troubles with it. This means that the MappingUtils class is not really the problem - there is something specific to the version that is manifesting a SecurityException but the true problem is not described in that exception. If you are a kind-hearted Google engineer, my problematic version is "integrate-1-0-0" I'm using the fact that versions in Appengine can run different code but share the same database. This is great for separating code out for different purposes (and reducing the classes loaded for threads since they don't need everything) but it seems that there's a classloader price to be paid here. Help! -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Security Exception using Guice Servlet
OK, so I'm still digging and don't have answer yet but I thought I'd give an update in case it sparks an idea and it'll be useful as a future reference. Firstly getting to the real error is a challenge because Guice on Appengine does a lot of recursion when creating dependency trees. In this case the real SecurityException is 4 levels down the the appengine only shows three levels. So I put a try catch in my servlet config class (IntegrationServletConfig) and then unwrapped the nested exceptions so see the culprit. Bear in mind that I cannot reproduce locally so I have to upload a new version for each test - yuck! This did yield a result. The SecurityException comes from Class.getDeclaredMethods java.lang.SecurityException: Unable to get members for class com.pbw.core.database.MappingUtils at com.google.appengine.runtime.Request.process-131516640218e6d2(Request.java) at java.lang.Class.getDeclaredMethods(Class.java:252) at com.google.inject.spi.InjectionPoint$Factory $2.getMembers(InjectionPoint.java:395) at com.google.inject.spi.InjectionPoint$Factory $2.getMembers(InjectionPoint.java:393) at com.google.inject.spi.InjectionPoint.addInjectorsForMembers(InjectionPoint.java: 359) at com.google.inject.spi.InjectionPoint.addInjectionPoints(InjectionPoint.java: 353) at com.google.inject.spi.InjectionPoint.forInstanceMethodsAndFields(InjectionPoint.java: 296) at com.google.inject.MembersInjectorStore.createWithListeners(MembersInjectorStore.java: 78) at com.google.inject.MembersInjectorStore.access $000(MembersInjectorStore.java:35) at com.google.inject.MembersInjectorStore $1.create(MembersInjectorStore.java:43) at com.google.inject.MembersInjectorStore $1.create(MembersInjectorStore.java:40) at com.google.inject.internal.FailableCache $1.apply(FailableCache.java:35) at com.google.inject.internal.MapMaker $StrategyImpl.compute(MapMaker.java:549) So now I know that something about the methods in my MappingUtils class are not ok for the appengine. I guess that the real answer is in this line... at com.google.appengine.runtime.Request.process-131516640218e6d2(Request.java) but I'll need someone at Google to look into that as it only occurs on the appengine. This got me thinking - what has changed? I've been using the class with no problems for 6 months. Here are the candidates.. - a new method : I added a new method that returns Class : when I removed it the error still occurs - a newer version of the Appengine : I upgraded to 1.3.1 : I downgraded to 1.3.0 and had the same problem. Now I'm lost for ideas. If you have a suggestion for a next move I'd love to hear it. Thanks -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Security Exception using Guice Servlet
I forgot to add : I suspected a Guice bug so I build the Guice trunk and tried that but there was no change in behaviour so that's out. On Mar 18, 4:17 pm, steveb wrote: > Hi, I've started to see a new exception for my application and I'm > hoping that a kind Googler can look this up for me. My appid is > catapult-lb and here's the stack trace. > > I'd be grateful for any help as this has been working for more than 6 > months and now (probably due to a code change of mine) I'm now hitting > this mysterious road-block. > > Thanks. > > com.google.inject.internal.ComputationException: > com.google.inject.internal.ComputationException: > com.google.inject.internal.ComputationException: > com.google.inject.internal.ComputationException: > java.lang.SecurityException: Unable to get members for class > com.pbw.core.database.MappingUtils > at com.google.inject.internal.MapMaker > $StrategyImpl.compute(MapMaker.java:553) > at com.google.inject.internal.MapMaker > $StrategyImpl.compute(MapMaker.java:419) > at com.google.inject.internal.CustomConcurrentHashMap > $ComputingImpl.get(CustomConcurrentHashMap.java:2041) > at com.google.inject.internal.FailableCache.get(FailableCache.java: > 46) > at > com.google.inject.internal.ConstructorInjectorStore.get(ConstructorInjector > Store.java: > 48) > at > com.google.inject.internal.ConstructorBindingImpl.initialize(ConstructorBin > dingImpl.java: > 120) > at > com.google.inject.internal.InjectorImpl.initializeJitBinding(InjectorImpl.j > ava: > 443) > at > com.google.inject.internal.InjectorImpl.createJustInTimeBinding(InjectorImp > l.java: > 698) > at > com.google.inject.internal.InjectorImpl.createJustInTimeBindingRecursive(In > jectorImpl.java: > 630) > at > com.google.inject.internal.InjectorImpl.getJustInTimeBinding(InjectorImpl.j > ava: > 223) > at > com.google.inject.internal.InjectorImpl.getBindingOrThrow(InjectorImpl.java : > 174) > at > com.google.inject.internal.InjectorImpl.getInternalFactory(InjectorImpl.jav a: > 704) > at com.google.inject.internal.FactoryProxy.notify(FactoryProxy.java: > 45) > at > com.google.inject.internal.BindingProcessor.runCreationListeners(BindingPro > cessor.java: > 238) > at > com.google.inject.internal.InternalInjectorCreator.initializeStatically(Int > ernalInjectorCreator.java: > 141) > at > com.google.inject.internal.InternalInjectorCreator.build(InternalInjectorCr > eator.java: > 114) > at com.google.inject.InjectorBuilder.build(InjectorBuilder.java:90) > at com.google.inject.Guice.createInjector(Guice.java:105) > at com.google.inject.Guice.createInjector(Guice.java:76) > at > com.pbw.integrate.config.IntegrationServletConfig.getInjector(Unknown > Source) > at > com.google.inject.servlet.GuiceServletContextListener.contextInitialized(Gu > iceServletContextListener.java: > 43) > at > org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java: > 530) -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
