i am developing a eclipse plugin . In this plugin i am using reflection to execute a function in a class present in another project which is a hibernate project.Whenever the invoke is used i.e
mymethod.invoke(myobj);
it is giving this exception
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:599)
at packagesearch.DummyExecution.execution(DummyExecution.java:154)
at packagesearch.HelloWorldAction.run(HelloWorldAction.java:48)
at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:251)
at org.eclipse.ui.internal.WWinPluginAction.runWithEvent(WWinPluginAction.java:229)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:583)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:500)
at org.eclipse.jface.action.ActionContributionItem$6.handleEvent(ActionContributionItem.java:452)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2384)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2348)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2200)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:495)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:490)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:386)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:599)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
at org.eclipse.equinox.launcher.Main.run(Main.java:1236)
at org.eclipse.equinox.launcher.Main.main(Main.java:1212)
Caused by: java.lang.NoClassDefFoundError: org.dom4j.DocumentException
at java.lang.J9VMInternals.verifyImpl(Native Method)
at java.lang.J9VMInternals.verify(J9VMInternals.java:72)
at java.lang.J9VMInternals.initialize(J9VMInternals.java:134)
at test.Example.demo1(Example.java:38)
... 36 more
Caused by: java.lang.ClassNotFoundException: org.dom4j.DocumentException
at java.net.URLClassLoader.findClass(URLClassLoader.java:419)
at java.lang.ClassLoader.loadClass(ClassLoader.java:643)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:345)
at java.lang.ClassLoader.loadClass(ClassLoader.java:609)
... 40 more
what is the exact problem . i have used loader to load the class.Help
It means exactly what it says, it couldn't find the class org.dom4j.DocumentException. Most likely, your classpath is incorrect.
I wonder if this has anything to do with Hibernate using proxy objects to represent the persistent entities. So in essence, if you checked the class type for an entity x, you may get something like x_javassist_1334 because Hibernate wraps your object to add some persistence specific functionality. I would do a simple check and print out the classname for the object you're invoking the method on before proceeding any further.
Related
I have recently started getting following exception, only when junits are being run. In normal flow, the method runs fine. (In fact even the jUnits used to work fine till some time back)
java.lang.NoSuchMethodException:
io.jsonwebtoken.impl.crypto.MacProvider.generateKey(io.jsonwebtoken.SignatureAlgorithm)
Following is the method:
public static String generateDummyJWT(String userName)
{
return Jwts.builder().claim("user_name", StringUtils.defaultString(userName)).setAudience("client1").signWith(Keys.secretKeyFor(SignatureAlgorithm.HS384)).compact();
}
And jjwt versions:
Following is the complete stack trace:
Caused by: java.lang.IllegalStateException: Unable to invoke class
method io.jsonwebtoken.impl.crypto.MacProvider#generateKey. Ensure
the necessary implementation is in the runtime classpath. at
io.jsonwebtoken.lang.Classes.invokeStatic(Classes.java:202) at
io.jsonwebtoken.security.Keys.secretKeyFor(Keys.java:121) at
com.random.util.ServiceSpecificUtil.generateDummyJWT(ServiceSpecificUtil.java:143)
at
com.random.util.ServiceConstants.(ServiceConstants.java:203)
at com.random.MyClass.isUserBranch(MyClass.java:67) at
com.random.MyClass.validName(MyClass.java:93) at
com.random.MyClass.preConditionCheck(MyClass.java:82) at
com.random.MyClass.get(MyClass.java:46) at
com.random.MyClass2.evaluateExpression(MyClass2.java:218) at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498) at
org.powermock.api.mockito.internal.invocation.MockitoMethodInvocationControl$1.invoke(MockitoMethodInvocationControl.java:243)
at
org.mockito.internal.invocation.realmethod.CleanTraceRealMethod.invoke(CleanTraceRealMethod.java:30)
at
org.mockito.internal.invocation.InvocationImpl.callRealMethod(InvocationImpl.java:112)
at
org.mockito.internal.stubbing.answers.CallsRealMethods.answer(CallsRealMethods.java:41)
at
org.mockito.internal.handler.MockHandlerImpl.handle(MockHandlerImpl.java:93)
at
org.powermock.api.mockito.internal.invocation.MockitoMethodInvocationControl.performIntercept(MockitoMethodInvocationControl.java:266)
at
org.powermock.api.mockito.internal.invocation.MockitoMethodInvocationControl.invoke(MockitoMethodInvocationControl.java:192)
at org.powermock.core.MockGateway.doMethodCall(MockGateway.java:132)
at org.powermock.core.MockGateway.methodCall(MockGateway.java:63) at
com.random.MyClass2.evaluateExpression(MyClass2.java) at
com.random.MyClass2.isPermitted(MyClass2.java:107) at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498) at
org.powermock.api.mockito.internal.invocation.MockitoMethodInvocationControl$1.invoke(MockitoMethodInvocationControl.java:243)
at
org.mockito.internal.invocation.realmethod.CleanTraceRealMethod.invoke(CleanTraceRealMethod.java:30)
at
org.mockito.internal.invocation.InvocationImpl.callRealMethod(InvocationImpl.java:112)
at
org.mockito.internal.stubbing.answers.CallsRealMethods.answer(CallsRealMethods.java:41)
at
org.mockito.internal.handler.MockHandlerImpl.handle(MockHandlerImpl.java:93)
at
org.powermock.api.mockito.internal.invocation.MockitoMethodInvocationControl.performIntercept(MockitoMethodInvocationControl.java:266)
at
org.powermock.api.mockito.internal.invocation.MockitoMethodInvocationControl.invoke(MockitoMethodInvocationControl.java:192)
... 32 more Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498) at
io.jsonwebtoken.lang.Classes.invokeStatic(Classes.java:198) ... 66
more Caused by: java.lang.IllegalStateException: The HmacSHA384
algorithm is not available. This should never happen on JDK 7 or
later - please report this to the JJWT developers. at
io.jsonwebtoken.impl.crypto.MacProvider.generateKey(MacProvider.java:94)
at
io.jsonwebtoken.impl.crypto.MacProvider.generateKey(MacProvider.java:63)
... 71 more Caused by: java.security.NoSuchAlgorithmException:
HmacSHA384 KeyGenerator not available at
javax.crypto.KeyGenerator.(KeyGenerator.java:169) at
javax.crypto.KeyGenerator.getInstance(KeyGenerator.java:223) at
io.jsonwebtoken.impl.crypto.MacProvider.generateKey(MacProvider.java:92)
... 72 more
I was able to resolve my problem.
Someone in the team had added the call to above function while initializing a static final variable like this:
public static String TOKEN_GUEST = ServiceSpecificUtil.generateDummyJWT(USERNAME);
Now, it seems that access to the java.security packges generally does not work well with PowerMock due to heavy use of reflections & byte code manipulations:
Although I had referred this SO post and tried the suggested solution of using
#PowerMockIgnore like:
#PowerMockIgnore({"org.apache.http.conn.ssl.*", "javax.net.ssl.*" , "javax.crypto.*"})
and that might be helpful in preventing errors when above function was called from another function. But it was not preventing errors in static variable initialization.
public static String TOKEN_GUEST = ServiceSpecificUtil.generateDummyJWT(USERNAME);
I will update this post when I dig deeper as to why the error was coming only in case of static variable initialization and not when ServiceSpecificUtil.generateDummyJWT(USERNAME) was being called from another function.
I am getting a NullPointerException as shown below.
However, the debugger is not able to bring it up when enabled in this method, the code is getting invoked with reflections. Can you please provide me ideas\techniques to be able to debug this code?
[10/18/16 18:20:47:933 EST] 00000051 DWLExceptionU E java.lang.NullPointerException
at com.dwl.base.notification.NotificationManager$NotificationChannel.notify(NotificationManager.java:662)
at com.dwl.base.notification.NotificationManager$NotificationType.notify(NotificationManager.java:402)
at com.dwl.base.notification.NotificationManager.notify(NotificationManager.java:1454)
at com.dwl.base.notification.bean.impl.NotificationBean.notify(NotificationBean.java:142)
at com.dwl.base.notification.EJSLocalCSLNotification_e2801c59.notify(EJSLocalCSLNotification_e2801c59.java)
at com.dwl.base.notification.EJSProxy$$NotificationLocal.notify(Unknown Source)
at au.com.xxxxx.mdm.notification.NotificationHelper.sendNotification(NotificationHelper.java:75)
at au.com.xxxxxx.mdm.behaviour.SingleCustomerViewId.triggerNotification(SingleCustomerViewId.java:159)
at au.com.xxxxxxx.mdm.behaviour.SingleCustomerViewId.execute(SingleCustomerViewId.java:129)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:88)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
at java.lang.reflect.Method.invoke(Method.java:613)
at com.dwl.base.extensionFramework.JavaExtensionSet.invoke(JavaExtensionSet.java:159)
at com.dwl.base.extensionFramework.ExtensionHandler.executeExtension(ExtensionHandler.java:251)
at com.dwl.base.DWLCommonComponent.handleExtensions(DWLCommonComponent.java:1380)
at com.dwl.base.DWLCommonComponent.postExecute(DWLCommonComponent.java:509)
at com.dwl.tcrm.common.TCRMCommonComponent.postExecute(TCRMCommonComponent.java:263)
at com.dwl.tcrm.coreParty.component.TCRMPersonComponent.addPerson(TCRMPersonComponent.java:1641)
at com.dwl.tcrm.coreParty.component.TCRMPartyComponent.addPerson(TCRMPartyComponent.java:3079)
at com.dwl.tcrm.coreParty.component.TCRMPartyComponent.addPartySimple(TCRMPartyComponent.java:2813)
at com.dwl.tcrm.coreParty.component.TCRMPartyComponent.addParty(TCRMPartyComponent.java:2471)
at com.dwl.tcrm.coreParty.controller.TCRMCorePartyTxnBean.addPerson(TCRMCorePartyTxnBean.java:1764)
at Proxy5aa32899_c04f_46c5_9706_69af241cd3c4.addPerson(Unknown Source)
at Proxy5aa32899_c04f_46c5_9706_69af241cd3c4.addPerson(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:88)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
at java.lang.reflect.Method.invoke(Method.java:613)
at com.dwl.base.requestHandler.DWLTxnBP.processPersistentObject(DWLTxnBP.java:262)
at com.dwl.base.requestHandler.DWLTxnBP.execute(DWLTxnBP.java:115)
at com.dwl.base.requestHandler.DWLTxnProcessor.processTx(DWLTxnProcessor.java:98)
at com.dwl.unifi.tx.manager.CTxRxFacade.processTxNormal(CTxRxFacade.java:681)
at com.dwl.unifi.tx.manager.CTxRxFacade.processTx(CTxRxFacade.java:544)
at com.dwl.base.requestHandler.DWLRequestHandler.processTransaction(DWLRequestHandler.java:1187)
at com.dwl.base.requestHandler.DWLRequestHandler.processTx(DWLRequestHandler.java:591)
at com.dwl.base.requestHandler.DWLServiceControllerBase.processRequest(DWLServiceControllerBase.java:253)
at com.dwl.base.requestHandler.beans.EJSRemoteCSLDWLServiceController_2c54996d.processRequest(EJSRemoteCSLDWLServiceController_2c54996d.java)
at com.dwl.base.requestHandler.beans._EJSRemoteCSLDWLServiceController_2c54996d_Tie.processRequest(_EJSRemoteCSLDWLServiceController_2c54996d_Tie.java:1)
at com.dwl.base.requestHandler.beans._EJSRemoteCSLDWLServiceController_2c54996d_Tie._invoke(_EJSRemoteCSLDWLServiceController_2c54996d_Tie.java)
at com.ibm.CORBA.iiop.ServerDelegate.dispatchInvokeHandler(ServerDelegate.java:669)
at com.ibm.CORBA.iiop.ServerDelegate.dispatch(ServerDelegate.java:523)
at com.ibm.rmi.iiop.ORB.process(ORB.java:523)
at com.ibm.CORBA.iiop.ORB.process(ORB.java:1575)
at com.ibm.rmi.iiop.Connection.doRequestWork(Connection.java:3039)
at com.ibm.rmi.iiop.Connection.doWork(Connection.java:2922)
at com.ibm.rmi.iiop.WorkUnitImpl.doWork(WorkUnitImpl.java:64)
at com.ibm.ejs.oa.pool.PooledThread.run(ThreadPool.java:118)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1892)
Can you please provide me ideas\techniques to be able to debug this code?
Since you said the method is called from reflection, you can see that in the stacktrace.
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:88)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
at java.lang.reflect.Method.invoke(Method.java:613)
So, keep reading up from that.
I'm guessing you intentionally edited the xxxx values, so these are your libraries that are being dynamically called.
at au.com.xxxxx.mdm.notification.NotificationHelper.sendNotification(NotificationHelper.java:75)
at au.com.xxxxxx.mdm.behaviour.SingleCustomerViewId.triggerNotification(SingleCustomerViewId.java:159)
at au.com.xxxxxxx.mdm.behaviour.SingleCustomerViewId.execute(SingleCustomerViewId.java:129)
Then, the rest of the call stack just goes through some other code library within the same package.
at com.dwl.base.notification.NotificationManager$NotificationChannel.notify(NotificationManager.java:662)
at com.dwl.base.notification.NotificationManager$NotificationType.notify(NotificationManager.java:402)
at com.dwl.base.notification.NotificationManager.notify(NotificationManager.java:1454)
at com.dwl.base.notification.bean.impl.NotificationBean.notify(NotificationBean.java:142)
at com.dwl.base.notification.EJSLocalCSLNotification_e2801c59.notify(EJSLocalCSLNotification_e2801c59.java)
at com.dwl.base.notification.EJSProxy$$NotificationLocal.notify(Unknown Source)
So, the problem definitely starts at NotificationHelper.sendNotification(NotificationHelper.java:75), but it cannot easily be determined the path that the code took in order to reach its eventual destination or what exactly caused the exception without inspecting the source of (NotificationManager.java:662)
When running my GWT/Errai app I get this error message:
00:00:00.000 [ERROR] Unable to load module entry point class
org.jboss.errai.ioc.client.Container (see associated exception for
details) java.lang.RuntimeException: critical error in IOC container
bootstrap at
org.jboss.errai.ioc.client.Container.bootstrapContainer(Container.java:69)
at
org.jboss.errai.ioc.client.Container.onModuleLoad(Container.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601) at
com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:396) at
com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:200)
at
com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:525)
at
com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:363)
at java.lang.Thread.run(Thread.java:722) Caused by:
java.lang.AssertionError: This UIObject's element is not set; you may
be missing a call to either Composite.initWidget() or
UIObject.setElement() at
com.google.gwt.user.client.ui.UIObject.getElement(UIObject.java:527)
at
org.jboss.errai.ui.shared.TemplateUtil.compositeComponentReplace(TemplateUtil.java:61)
at
org.jboss.errai.ioc.client.BootstrapperImpl$65$1.init(BootstrapperImpl.java:1623)
at
org.jboss.errai.ioc.client.BootstrapperImpl$65$1.init(BootstrapperImpl.java:1)
at
org.jboss.errai.ioc.client.container.CreationalContext.resolveAllProxies(CreationalContext.java:351)
at
org.jboss.errai.ioc.client.container.CreationalContext.finish(CreationalContext.java:312)
at
org.jboss.errai.ioc.client.Container.bootstrapContainer(Container.java:59)
at
org.jboss.errai.ioc.client.Container.onModuleLoad(Container.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601) at
com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:396) at
com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:200)
at
com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:525)
at
com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:363)
at java.lang.Thread.run(Thread.java:722)
I've already done mvn clean compile package gwt:run
It probably means that you use a Composite on which you did not call initWidget(Widget).
Extract of javadoc for Composite
A type of widget that can **wrap** another widget, hiding the wrapped widget's methods.
If you don't call initWidget(), there is no wrapped widget and it leads to this error message.
It also happens if you extends UiObject without calling setElement() but this is a rare usecase.
My framework seems to have issues with a special entity that constantly fails to get serialized with an exception.
Entity:
http://svn.apache.org/viewvc/incubator/openmeetings/trunk/singlewebapp/src/org/apache/openmeetings/persistence/beans/basic/Server.java?view=markup
My theory: The serializer uses the enhanced class from OpenJPA, and it cannot serialize it.
But I have no idea how this can only happen with this entity and all other work fine.
Exception:
WARN: Exception: java.lang.reflect.InvocationTargetException
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.commons.beanutils.BeanMap.get(BeanMap.java:390)
at org.red5.io.amf.Output.writeObject(Output.java:348)
at org.red5.io.object.Serializer.writeObjectType(Serializer.java:332)
at org.red5.io.object.Serializer.writeComplex(Serializer.java:173)
at org.red5.io.object.Serializer.serialize(Serializer.java:119)
at org.red5.io.amf.Output.writeObject(Output.java:348)
at org.red5.io.object.Serializer.writeObjectType(Serializer.java:332)
at org.red5.io.object.Serializer.writeComplex(Serializer.java:173)
at org.red5.io.object.Serializer.serialize(Serializer.java:119)
at org.red5.io.amf.Output.writeObject(Output.java:348)
at org.red5.io.object.Serializer.writeObjectType(Serializer.java:332)
at org.red5.io.object.Serializer.writeComplex(Serializer.java:173)
at org.red5.io.object.Serializer.serialize(Serializer.java:119)
at org.red5.io.object.Serializer.serialize(Serializer.java:60)
at org.red5.server.net.rtmp.codec.RTMPProtocolEncoder.encodeNotifyOrInvoke(RTMPProtocolEncoder.java:800)
at org.red5.server.net.rtmp.codec.RTMPProtocolEncoder.encodeNotifyOrInvoke(RTMPProtocolEncoder.java:747)
at org.red5.server.net.rtmp.codec.RTMPProtocolEncoder.encodeInvoke(RTMPProtocolEncoder.java:735)
at org.red5.server.net.rtmp.codec.RTMPProtocolEncoder.encodeMessage(RTMPProtocolEncoder.java:514)
at org.red5.server.net.rtmp.codec.RTMPProtocolEncoder.encodePacket(RTMPProtocolEncoder.java:147)
at org.red5.server.net.rtmp.codec.RTMPProtocolEncoder.encode(RTMPProtocolEncoder.java:119)
at org.red5.server.net.rtmp.codec.RTMPMinaProtocolEncoder.encode(RTMPMinaProtocolEncoder.java:48)
at org.apache.mina.filter.codec.ProtocolCodecFilter.filterWrite(ProtocolCodecFilter.java:322)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterWrite(DefaultIoFilterChain.java:509)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1400(DefaultIoFilterChain.java:46)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.filterWrite(DefaultIoFilterChain.java:808)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.filterWrite(DefaultIoFilterChain.java:734)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterWrite(DefaultIoFilterChain.java:509)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireFilterWrite(DefaultIoFilterChain.java:501)
at org.apache.mina.core.session.AbstractIoSession.write(AbstractIoSession.java:494)
at org.apache.mina.core.session.AbstractIoSession.write(AbstractIoSession.java:439)
at org.red5.server.net.rtmp.RTMPMinaConnection.write(RTMPMinaConnection.java:308)
at org.red5.server.net.rtmp.Channel.write(Channel.java:136)
at org.red5.server.net.rtmp.Channel.write(Channel.java:105)
at org.red5.server.net.rtmp.RTMPHandler.onInvoke(RTMPHandler.java:428)
at org.red5.server.net.rtmp.BaseRTMPHandler.messageReceived(BaseRTMPHandler.java:132)
at org.red5.server.net.rtmp.RTMPMinaIoHandler.messageReceived(RTMPMinaIoHandler.java:164)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:716)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:796)
at org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flush(ProtocolCodecFilter.java:427)
at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:245)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:796)
at org.apache.mina.core.filterchain.IoFilterEvent.fire(IoFilterEvent.java:75)
at org.apache.mina.core.session.IoEvent.run(IoEvent.java:63)
at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.runTask(OrderedThreadPoolExecutor.java:780)
at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.runTasks(OrderedThreadPoolExecutor.java:772)
at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.run(OrderedThreadPoolExecutor.java:714)
at java.lang.Thread.run(Thread.java:680)
Caused by: java.lang.UnsupportedOperationException
at org.apache.openjpa.kernel.DetachedStateManager.isProvisional(DetachedStateManager.java:760)
... 55 more
I'm getting stack traces like this:
java.lang.NoClassDefFoundError: sun/reflect/GeneratedMethodAccessor1
at sun.reflect.GeneratedMethodAccessor1.<clinit>(Unknown Source)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:381)
at java.security.AccessController.doPrivileged(Native Method)
at sun.reflect.MethodAccessorGenerator.generate(MethodAccessorGenerator.java:377)
at sun.reflect.MethodAccessorGenerator.generateMethod(MethodAccessorGenerator.java:59)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:28)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at edu.tufts.cs.testsim.LogicalProcess.dispatchMessage(LogicalProcess.java:214)
at edu.tufts.cs.testsim.LogicalProcess.processForward(LogicalProcess.java:287)
at edu.tufts.cs.testsim.LogicalProcess.doOperation(LogicalProcess.java:423)
at edu.tufts.cs.testsim.LogicalProcess.run(LogicalProcess.java:434)
at java.lang.Thread.run(Thread.java:637)
Caused by: java.lang.ClassNotFoundException: sun.reflect.GeneratedMethodAccessor1
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:316)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:288)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:374)
... 19 more
What are GeneratedMethodAccessor1, GeneratedMethodAccessor2, GeneratedMethodAccessorN and what might be causing them to not be found? I am doing some byte code rewriting at run time, but only before the class is loaded, and the first several calls through reflection work fine. I'm wondering if this is happening after the JIT compiler gets a hold of my code, but I don't even have a very good idea of how to start debugging this.
GeneratedMethodAccessor### are classes generated at runtime by the reflection implementation to call methods and constructors. This form a bytecode bridge from instances of Method or Constructor to the actual method or constructor. More information is available in the source code.
Deserialisation also does something similar, sharing some of the same mechanism, to invoke the most derived non-Serializable constructor.