Eclipse with Quick JUnit plugin gives the me following error when I try to run a JUnit test with Ctrl+0:
java.lang.NoClassDefFoundError: org/junit/runner/notification/StoppedByUserException
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:48)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:452)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.ClassNotFoundException: org.junit.runner.notification.StoppedByUserException
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
... 6 more
JUnit is in the pom.xml:
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.9</version>
<scope>test</scope>
</dependency>
...
</dependencies>
Installing the m2e - Maven Integration for Eclipse plugin (which disappeared during a previous Eclipse upgrade) fixed the error.
I solved by installing Ive DE. The problem was basically dependencies not being resolved.
I did not notice until running Junit as the project was already compiled with an older eclipse.
I found this may be due to opening an eclipse mars workspace with eclipse luna. I did that and couldn't get it to work until i remembered that I had updated eclipse but not the link to eclipse. opening with eclipse mars all unit tests worked again.
Related
I am seeing a very strange behavior of wildfly9.x. Build process goes successful. after clicking on RUN AS -> Run on Server(WildFly9.x). It shows exception like NO class def found.
I have already added dependency in POM.xml and its scope is compile.
POM.xml file:
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.6</version>
<scope>compile</scope>
</dependency>
Exception:
Caused by: java.lang.ClassNotFoundException: org.apache.commons.codec.binary.Base64 from [Module "deployment.worldportfolio.war:main" from Service Module Loader]
at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:205)
Thanks in advance.
I solved it by myself. If you want to run wildfly server from eclipse IDE so you should follow this a very simple method create lib folder in WEB-INF and place all the required Jars in the lib folder. You are done.
I am trying to write XMPP Clint using smack 4.1.1. I have added smack jar files into build path. I am using eclipse IDE to write the code.
However, when I am trying to run application I get NoClassDefFoundErrors. I fixed some of these errors adding xpp3, jxmpp and minidns jar files into the build path. Yet, I am getting the following error.
Exception in thread "main" java.lang.NoClassDefFoundError: org/jxmpp/util/cache/ExpirationCache
at org.jivesoftware.smack.util.dns.minidns.MiniDnsResolver.<clinit>(MiniDnsResolver.java:46)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:274)
at org.jivesoftware.smack.SmackInitialization.loadSmackClass(SmackInitialization.java:213)
at org.jivesoftware.smack.SmackInitialization.parseClassesToLoad(SmackInitialization.java:193)
at org.jivesoftware.smack.SmackInitialization.processConfigFile(SmackInitialization.java:163)
at org.jivesoftware.smack.SmackInitialization.processConfigFile(SmackInitialization.java:148)
at org.jivesoftware.smack.SmackInitialization.<clinit>(SmackInitialization.java:116)
at org.jivesoftware.smack.SmackConfiguration.getVersion(SmackConfiguration.java:96)
at org.jivesoftware.smack.ConnectionConfiguration.<clinit>(ConnectionConfiguration.java:38)
at JabberSmackAPI.login(JabberSmackAPI.java:29)
at JabberSmackAPI.main(JabberSmackAPI.java:76)
Caused by: java.lang.ClassNotFoundException: org.jxmpp.util.cache.ExpirationCache
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 12 more
How to fix this issue?
In the internet, it is advised to use gradle or maven for building the same. If so, can you help me how to use the same? I have never used them before.
As per below stack trace
Caused by: java.lang.ClassNotFoundException: org.jxmpp.util.cache.ExpirationCache
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
It seem You are missing jxmpp-util-cache-0.5.0-alpha2.jar in your class path. Download and add this jar to your lib/ directory of your application .
In the internet, it is advised to use gradle or maven for building the
same. If so, can you help me how to use the same?
Create a meven project in eclipse .If you are new to meven project refer
How to create a Java project with Maven
And add Below dependencies to pom.xml of your meven build project
<dependency>
<groupId>org.igniterealtime.smack</groupId>
<artifactId>smack-java7</artifactId>
<version>4.1.0</version>
</dependency>
<dependency>
<groupId>org.igniterealtime.smack</groupId>
<artifactId>smack-tcp</artifactId>
<version>4.1.0</version>
</dependency>
<dependency>
<groupId>org.igniterealtime.smack</groupId>
<artifactId>smack-im</artifactId>
<version>4.1.0</version>
</dependency>
<dependency>
<groupId>org.igniterealtime.smack</groupId>
<artifactId>smack-extensions</artifactId>
<version>4.1.0</version>
</dependency>
For more details refer this link
I’m using Eclipse Juno on Mac 10.9.1, Maven 3.1.1, JUnit 4.11, and have this Apache httpcomponents dependency:
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.3.4</version>
</dependency>
When I run a JUnit test in Eclipse (by right clicking my test name, and selecting “Run As” -> “Junit Test”), I get the following error
java.lang.NoSuchMethodError: org.apache.http.impl.client.DefaultHttpClient.execute(Lorg/apache/http/client/methods/HttpUriRequest;)Lorg/apache/http/client/methods/CloseableHttpResponse;
at org.usersubscr.subco.ebook.mvc.CleverInstantLoginController.validateInstantAccessLogin(CleverInstantLoginController.java:143)
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.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:100)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:604)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:565)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
at org.mainco.subco.ebook.mvc.CleverInstantLoginControllerTest.submitLoginWithCode(CleverInstantLoginControllerTest.java:119)
at org.mainco.subco.ebook.mvc.CleverInstantLoginControllerTest.testInstantLoginSuccess(CleverInstantLoginControllerTest.java:105)
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.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
The specific line where things are dying is
response1 = httpclient.execute(httppost);
The frustrating thing about this is that when I run the same test on the command line, using
mvn clean test -Dtest=MyHttpTest
The test runs fine without the error. I have tried running “mvn eclipse:eclipse” on my project and refreshing my workspace, but that doesn’t seem to help. How can I get the Eclipse JUnit to behave the same way as running the test on the command line?
I frequently run into this problem.
If I am running from Maven, either from command line or from Eclipse, then I always do mvn clean test.
If I am running as JUnit from Eclipse, then I first do Project > Clean (followed by build), and finally Run as JUnit. If that still does not solve the problem, then I first do Maven Clean and repeat the procedure.
Bottom line is: Maven and Eclipse each have their own (strong) opinion on how the world works, and in certain cases they contradict each other.
Okay, had this exact same problem with
java.lang.NoSuchMethodError: org.apache.commons.collections.MapUtils.isNotEmpty
For me this was because Hibernate includes commons-collections-3.1 which does not include method isNotEmpty(). I though it was really weird, as when I used m2e plugin Dependency Hierarchy feature, it showed me that it automatically excluded the dependency and used 3.2 instead. What's worse, it seemed that manually excluding the artifact from the pom did not do anything.
For me the problem was that I had Maven dependency with scope set to test and for some reason Eclipse JUnit used this dependency without exception. I have multi module project and I was trying to find out the problem in downstream module (that is, I was looking the dependency hierarchy of a module that included a module, which included another module, that had the dependency which caused problems), so Eclipse Maven plugin did not see the dependency as the scope was test. As said, JUnit did not understand that it should't use this dependency further down the road, and this gave me headache.
For you the problem might be something else, so I try to give more general picture to track the problem down. Following is the process I used to track and eliminate the issue, hope this helps:
used m2e plugin Dependency Hierarchy to track down all versions of the dependency
found out that Hibernate uses old dependency
went to my local m2 repo and renamed all incorrect versions (see image)
run tests (to verify we are on right track), they should fail saying that the dependency cannot be found
use Notepad++ to find all files that include the wrong dependency (for me the search string was "commons-collections/3.1/commons-collections-3.1.jar" and file name filter was ".classpath")
find out the modules trying to use it
check the exact pom files and exclude the culprit (for me it was the following:)
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-annotations</artifactId>
<version>3.5.6-Final</version>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>commons-collections</groupId>
<artifactId>commons-collections</artifactId>
</exclusion>
</exclusions>
</dependency>
Eclipse: Juno (3.8.0)
M2E build: 1.2.0.20120903-1050
When I try to right click on a Maven Project and select Maven > Update Project... and then click OK , I get the following showstopping error:
'Updating Maven Project has encountered a problem. An internal error
occured during: "Updating Maven Project".
This one is straight from the box - so it must be fundamentally broken? This error presents the following exception:
java.lang.NoClassDefFoundError: Lorg/codehaus/plexus/archiver/jar/JarArchiver;
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Unknown Source)
at java.lang.Class.getDeclaredFields(Unknown Source)
at com.google.inject.spi.InjectionPoint.getInjectionPoints(InjectionPoint.java:651)
at com.google.inject.spi.InjectionPoint.forInstanceMethodsAndFields(InjectionPoint.java:358)
at com.google.inject.internal.ConstructorBindingImpl.getInternalDependencies(ConstructorBindingImpl.java:155)
at com.google.inject.internal.InjectorImpl.getInternalDependencies(InjectorImpl.java:585)
at com.google.inject.internal.InjectorImpl.cleanup(InjectorImpl.java:542)
at com.google.inject.internal.InjectorImpl.initializeJitBinding(InjectorImpl.java:528)
at com.google.inject.internal.InjectorImpl.createJustInTimeBinding(InjectorImpl.java:833)
at com.google.inject.internal.InjectorImpl.createJustInTimeBindingRecursive(InjectorImpl.java:758)
at com.google.inject.internal.InjectorImpl.getJustInTimeBinding(InjectorImpl.java:255)
at com.google.inject.internal.InjectorImpl.getBindingOrThrow(InjectorImpl.java:204)
at com.google.inject.internal.InjectorImpl.getProviderOrThrow(InjectorImpl.java:954)
at com.google.inject.internal.InjectorImpl.getProvider(InjectorImpl.java:987)
at com.google.inject.internal.InjectorImpl.getProvider(InjectorImpl.java:950)
at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1000)
at org.sonatype.guice.bean.reflect.AbstractDeferredClass.get(AbstractDeferredClass.java:45)
at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:84)
at com.google.inject.internal.InternalFactoryToInitializableAdapter.provision(InternalFactoryToInitializableAdapter.java:52)
at com.google.inject.internal.ProviderInternalFactory$1.call(ProviderInternalFactory.java:70)
at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:100)
at org.sonatype.guice.plexus.lifecycles.PlexusLifecycleManager.onProvision(PlexusLifecycleManager.java:138)
at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:108)
at com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:55)
at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:68)
at com.google.inject.internal.InternalFactoryToInitializableAdapter.get(InternalFactoryToInitializableAdapter.java:45)
at com.google.inject.internal.InjectorImpl$3$1.call(InjectorImpl.java:965)
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1011)
at com.google.inject.internal.InjectorImpl$3.get(InjectorImpl.java:961)
at com.google.inject.Scopes$1$1.get(Scopes.java:59)
at org.sonatype.guice.bean.locators.LazyBeanEntry.getValue(LazyBeanEntry.java:83)
at org.sonatype.guice.plexus.locators.LazyPlexusBean.getValue(LazyPlexusBean.java:49)
at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:253)
at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:245)
at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:455)
at org.eclipse.m2e.core.internal.embedder.MavenImpl.getConfiguredMojo(MavenImpl.java:344)
at org.sonatype.m2e.mavenarchiver.internal.AbstractMavenArchiverConfigurator.reflectManifestGeneration(AbstractMavenArchiverConfigurator.java:406)
at org.sonatype.m2e.mavenarchiver.internal.AbstractMavenArchiverConfigurator.generateManifest(AbstractMavenArchiverConfigurator.java:364)
at org.sonatype.m2e.mavenarchiver.internal.AbstractMavenArchiverConfigurator.mavenProjectChanged(AbstractMavenArchiverConfigurator.java:183)
at org.sonatype.m2e.mavenarchiver.internal.AbstractMavenArchiverConfigurator.mavenProjectChanged(AbstractMavenArchiverConfigurator.java:170)
at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.mavenProjectChanged(ProjectConfigurationManager.java:888)
at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.notifyProjectChangeListeners(ProjectRegistryManager.java:729)
at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.applyMutableProjectRegistry(ProjectRegistryManager.java:852)
at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:281)
at org.eclipse.m2e.core.internal.project.registry.MavenProjectManager.refresh(MavenProjectManager.java:58)
at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:87)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:728)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:199)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:239)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:292)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:295)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:351)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:374)
at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143)
at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: java.lang.ClassNotFoundException: org.codehaus.plexus.archiver.jar.JarArchiver
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
... 59 more
I have come across the same error.
When I first created the maven project using m2e, the maven installation was configured to my local apache-maven-3.0.3 folder.
Recently I switched ide to spring tool suite, which has apache-maven-3.0.4 bundled. So I use 3.0.4 instead, then the error "java.lang.NoClassDefFoundError: Lorg/codehaus/plexus/archiver/jar/JarArchiver;" appears. Now I get the configuration back to previous version of maven, the error disappears.
I'm using m2e 1.2.0 without problems, so it must be a local problem on your PC. Try:
Try restarting Eclipse
A colleague had a similar problem yesterday on a Linux machine. To my surprise, a reboot fixed it.
Make sure that the JAR files in ~/.m2/repository/org/codehaus/plexus/plexus-archiver/ aren't corrupt.
When you do the last step, make sure you look in the correct repository. It's possible to configure the two Maven's (Eclipse's and the one on the command line) differently. Check the "Maven" preferences in Eclipse for the paths of the settings files.
I am using GWT in my project., recently I tried converting a manual compilation of GWT + Java + tomcat to a maven project., almost I am able successfully package it to a war., BUt when I deployed on tomcat I got followin error:
EVERE: Exception while dispatching incoming RPC call
java.lang.NoClassDefFoundError: javax/validation/Path
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2818)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1159)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1647)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at com.google.gwt.user.server.rpc.SerializationPolicyLoader.loadFromStream(SerializationPolicyLoader.java:196)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.loadSerializationPolicy(RemoteServiceServlet.java:90)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.doGetSerializationPolicy(RemoteServiceServlet.java:293)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.getSerializationPolicy(RemoteServiceServlet.java:157)
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.prepareToRead(ServerSerializationStreamReader.java:455)
Here is what i added for my added in my pom.xml:
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-servlet</artifactId>
<version>${gwt.version}</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-user</artifactId>
<version>${gwt.version}</version>
<scope>provided</scope>
</dependency>
as dependencies.
Kindly help me.
What I need to add more to resolve the issue?
It is the dependency scope that is causing the problem. compile is actually the default scope so this could be omitted from the first dependency if you want.
The problem is in the second artifact which is declared as provided. This means that the application is expecting the web container to provide that library/classes. It looks like it is not providing the required classes, which results in the NoClassDefFoundError.
Removing the <scope>provided</scope>, will instruct Maven to package that library with the application and Tomcat should be able to get past that error.
There are no compile-time errors since the gwt-user is available at compile time. It is simply not available at run-time for Tomcat.