json with Jersey: NoClassDefFoundError
Solution 1
I believe the NoClassDefFoundError is caused because of a conflicting JAXB-impl jar which may be present in your classpath.
If you think, Jackson and stax-api dependencies bundled with Jersey are causing this problem (I suspect that is not the case), you can exclude them from jersey-json dependency in your maven pom.
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-json</artifactId>
<version>1.8</version>
<exclusions>
<exclusion>
<artifactId>jettison</artifactId>
<groupId>org.codehaus.jettison</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-core-asl</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-mapper-asl</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-jaxrs</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-xc</artifactId>
<groupId>org.codehaus.jackson</groupId>
</exclusion>
<exclusion>
<artifactId>stax-api</artifactId>
<groupId>javax.xml.stream</groupId>
</exclusion>
</exclusions>
</dependency>
Solution 2
Possible solution (worked for me):
It turned out that stax comes with Java 1.6. But jersey downloaded the two mentioned stax jar files. So I guess the error occured because there are duplicate classes.
I just excluded the corresponding package in the pom.xml and it works now:
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-json</artifactId>
<version>1.14</version>
<exclusions>
<exclusion>
<artifactId>stax-api</artifactId>
<groupId>stax</groupId>
</exclusion>
<exclusion>
<artifactId>stax</artifactId>
<groupId>stax</groupId>
</exclusion>
</exclusions>
</dependency>
Solution 3
I know the question is quite old, but maybe the answer might be usefull for the future generations ;) I solved the problem using
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>2.0.1</version>
</dependency>
Comments
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Johannes Staehlin almost 2 years
I am trying to build a JSON RESTful Webservice with JAX-RS (Jersey). I'm also using Maven to build the App.
My first approach was
@Path("/Person") public class PersonService { @GET public String getPersonService() { Personperson= new Person(); person.setLocationCode("MEL"); person.setName("Johannes"); return person.getName(); } }
After pom.xml->clean install + Run On Server it works and the output is as execpted. But I would like to use JAXB to get the Person in JSON Format with all it's attributes:
@Path("/Person") public class PersonService { @GET public Person getPersonService() { Personperson= new Person(); person.setLocationCode("MEL"); person.setName("Johannes"); return person; } }
So I added
<dependency> <groupId>com.sun.jersey</groupId> <artifactId>jersey-json</artifactId> <version>1.8</version> </dependency>
to my pom file. The additional lib files (e.g. jackson-cors-asl-1.7.1.jar, jackson-jaxrs-1.7.1.jar, jaxb-impl,... ) are also available in the generated war file. //Edit: It also downloads stax-api-1.0.1.jar and stax-api-1.0-2.jar One of theese two files seem to let the error occur
Error: But calling /Person (or any other Service) leads to an Error:
javax.servlet.ServletException: Servlet.init() for servlet CloudAPIService threw exception org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) com.sap.security.auth.service.webcontainer.internal.Authenticator.invoke(Authenticator.java:147) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) com.sap.core.tenant.valve.TenantValidationValve.invokeNextValve(TenantValidationValve.java:169) com.sap.core.tenant.valve.TenantValidationValve.invoke(TenantValidationValve.java:84) com.sap.core.js.monitoring.tomcat.valve.RequestTracingValve.invoke(RequestTracingValve.java:27) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585) org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312) java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) java.lang.Thread.run(Thread.java:662)
root cause:
java.lang.NoClassDefFoundError: Could not initialize class com.sun.xml.bind.v2.model.impl.RuntimeBuiltinLeafInfoImpl com.sun.xml.bind.v2.model.impl.RuntimeTypeInfoSetImpl.<init>(RuntimeTypeInfoSetImpl.java:61) com.sun.xml.bind.v2.model.impl.RuntimeModelBuilder.createTypeInfoSet(RuntimeModelBuilder.java:129) com.sun.xml.bind.v2.model.impl.RuntimeModelBuilder.createTypeInfoSet(RuntimeModelBuilder.java:81) com.sun.xml.bind.v2.model.impl.ModelBuilder.<init>(ModelBuilder.java:152) com.sun.xml.bind.v2.model.impl.RuntimeModelBuilder.<init>(RuntimeModelBuilder.java:89) com.sun.xml.bind.v2.runtime.JAXBContextImpl.getTypeInfoSet(JAXBContextImpl.java:456) com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:302) com.sun.xml.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(JAXBContextImpl.java:1136) com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:154) com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:121) com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:202) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:133) javax.xml.bind.ContextFinder.find(ContextFinder.java:286) javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:372) javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:337) javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:244) com.sun.jersey.server.impl.wadl.WadlApplicationContextImpl.<init>(WadlApplicationContextImpl.java:72) com.sun.jersey.server.impl.wadl.WadlFactory.init(WadlFactory.java:97) com.sun.jersey.server.impl.application.RootResourceUriRules.initWadl(RootResourceUriRules.java:169) com.sun.jersey.server.impl.application.RootResourceUriRules.<init>(RootResourceUriRules.java:106) com.sun.jersey.server.impl.application.WebApplicationImpl._initiate(WebApplicationImpl.java:1298) com.sun.jersey.server.impl.application.WebApplicationImpl.access$700(WebApplicationImpl.java:169) com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:775) com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:771) com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193) com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:771) com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:766) com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:488) com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:318) com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:609) com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:210) com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:373) com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:556) javax.servlet.GenericServlet.init(GenericServlet.java:244) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) com.sap.security.auth.service.webcontainer.internal.Authenticator.invoke(Authenticator.java:147) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) com.sap.core.tenant.valve.TenantValidationValve.invokeNextValve(TenantValidationValve.java:169) com.sap.core.tenant.valve.TenantValidationValve.invoke(TenantValidationValve.java:84) com.sap.core.js.monitoring.tomcat.valve.RequestTracingValve.invoke(RequestTracingValve.java:27) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585) org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312) java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) java.lang.Thread.run(Thread.java:662)
Current workaround: Instead of adding the jersey-json dependency, I added jackson dependencies directly:
<groupId>org.codehaus.jackson</groupId> <artifactId>jackson-core-asl</artifactId> <version>1.9.11</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.11</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-jaxrs</artifactId> <version>1.9.11</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-xc</artifactId> <version>1.9.11</version> </dependency>
But now I have to add the jersey-json.jar manually.
Is there a way two add jersey-json two depenedencies, but avoiding that it downloads the stax-api.jar's ??
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Johannes Staehlin over 11 yearsIndeed JAXB was originall for XML, JSON supports it, too afaik. The problem occurs much earlier while in javax.servlet.ServletException: Servlet.init()
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Johannes Staehlin over 11 yearsThe exclusion of the stax-api worked for me. I just posted the answer 1 minute ago :) Will mark yours as correct. BTW it's a NoClassDefFoundError and not ClassNotFoundException.
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Arul Dhesiaseelan over 11 yearsThanks for catching that! Fixed the exception type.