java.lang.VerifyError: Cannot inherit from final class

[Charles Berger]

I'm experiencing this error in my project.  I'm using SpringBoot 2.0.2.RELEASE and Jackson 2.9.5.  Here is a stack trace:

java.lang.VerifyError: Cannot inherit from final class

at java.lang.ClassLoader.defineClass1(Native Method)

at java.lang.ClassLoader.defineClass(ClassLoader.java:760)

at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)

at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)

at java.net.URLClassLoader.access$100(URLClassLoader.java:73)

at java.net.URLClassLoader$1.run(URLClassLoader.java:367)

at java.net.URLClassLoader$1.run(URLClassLoader.java:361)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:360)

at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)

at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

at com.fasterxml.jackson.datatype.jdk8.Jdk8Module.setupModule(Jdk8Module.java:30)

at com.fasterxml.jackson.databind.ObjectMapper.registerModule(ObjectMapper.java:549)

at org.springframework.http.converter.json.Jackson2ObjectMapperBuilder.registerWellKnownModulesIfAvailable(Jackson2ObjectMapperBuilder.java:734)

at org.springframework.http.converter.json.Jackson2ObjectMapperBuilder.configure(Jackson2ObjectMapperBuilder.java:624)

at org.springframework.http.converter.json.Jackson2ObjectMapperBuilder.build(Jackson2ObjectMapperBuilder.java:608)

at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.<init>(MappingJackson2HttpMessageConverter.java:59)

at org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter.<init>(AllEncompassingFormHttpMessageConverter.java:74)

at org.springframework.web.client.RestTemplate.<init>(RestTemplate.java:179)

at xxx.submitRequest(APIControllerSpring.java:679)

at xxx.apiGetRequest(APIControllerSpring.java:96)

at xxx.apiGetRequest(APIControllerSpring.java:73)

at xxx.testInvalidAPIKeyGet(TestAPIV2ControllerSpring.java:116)

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:483)

at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)

at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)

at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)

at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)

at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)

at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)

at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)

at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)

at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)

at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)

at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)

at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)

at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)

at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)

at org.junit.runners.ParentRunner.run(ParentRunner.java:363)

at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)

at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

Looking around before posting this suggests that there is a duplicate class on my classpath but I am as sure as I can be that this is not the case.  Here is the maven dependency tree:

[INFO] com.xxx:xxx-api-framework-spring:jar:1.0.0

[INFO] +- org.springframework.boot:spring-boot-starter-web:jar:2.0.2.RELEASE:compile

[INFO] |  +- org.springframework.boot:spring-boot-starter:jar:2.0.2.RELEASE:compile

[INFO] |  |  +- org.springframework.boot:spring-boot:jar:2.0.2.RELEASE:compile

[INFO] |  |  |  +- (org.springframework:spring-core:jar:5.0.6.RELEASE:compile - omitted for duplicate)

[INFO] |  |  |  \- (org.springframework:spring-context:jar:5.0.6.RELEASE:compile - omitted for duplicate)

[INFO] |  |  +- org.springframework.boot:spring-boot-autoconfigure:jar:2.0.2.RELEASE:compile

[INFO] |  |  |  \- (org.springframework.boot:spring-boot:jar:2.0.2.RELEASE:compile - omitted for duplicate)

[INFO] |  |  +- org.springframework.boot:spring-boot-starter-logging:jar:2.0.2.RELEASE:compile

[INFO] |  |  |  +- ch.qos.logback:logback-classic:jar:1.2.3:compile

[INFO] |  |  |  |  +- ch.qos.logback:logback-core:jar:1.2.3:compile

[INFO] |  |  |  |  \- org.slf4j:slf4j-api:jar:1.7.25:compile

[INFO] |  |  |  +- org.apache.logging.log4j:log4j-to-slf4j:jar:2.10.0:compile

[INFO] |  |  |  |  +- (org.slf4j:slf4j-api:jar:1.7.25:compile - omitted for duplicate)

[INFO] |  |  |  |  \- org.apache.logging.log4j:log4j-api:jar:2.10.0:compile

[INFO] |  |  |  \- org.slf4j:jul-to-slf4j:jar:1.7.25:compile

[INFO] |  |  |     \- (org.slf4j:slf4j-api:jar:1.7.25:compile - omitted for duplicate)

[INFO] |  |  +- javax.annotation:javax.annotation-api:jar:1.3.2:compile

[INFO] |  |  +- org.springframework:spring-core:jar:5.0.6.RELEASE:compile

[INFO] |  |  |  \- org.springframework:spring-jcl:jar:5.0.6.RELEASE:compile

[INFO] |  |  \- org.yaml:snakeyaml:jar:1.19:runtime

[INFO] |  +- org.springframework.boot:spring-boot-starter-json:jar:2.0.2.RELEASE:compile

[INFO] |  |  +- (org.springframework.boot:spring-boot-starter:jar:2.0.2.RELEASE:compile - omitted for duplicate)

[INFO] |  |  +- (org.springframework:spring-web:jar:5.0.6.RELEASE:compile - omitted for duplicate)

[INFO] |  |  +- com.fasterxml.jackson.core:jackson-databind:jar:2.9.5:compile

[INFO] |  |  |  +- com.fasterxml.jackson.core:jackson-annotations:jar:2.9.0:compile

[INFO] |  |  |  \- com.fasterxml.jackson.core:jackson-core:jar:2.9.5:compile

[INFO] |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jdk8:jar:2.9.5:compile

[INFO] |  |  |  +- (com.fasterxml.jackson.core:jackson-core:jar:2.9.5:compile - omitted for duplicate)

[INFO] |  |  |  \- (com.fasterxml.jackson.core:jackson-databind:jar:2.9.5:compile - omitted for duplicate)

[INFO] |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jsr310:jar:2.9.5:compile

[INFO] |  |  |  +- (com.fasterxml.jackson.core:jackson-annotations:jar:2.9.0:compile - omitted for duplicate)

[INFO] |  |  |  +- (com.fasterxml.jackson.core:jackson-core:jar:2.9.5:compile - omitted for duplicate)

[INFO] |  |  |  \- (com.fasterxml.jackson.core:jackson-databind:jar:2.9.5:compile - omitted for duplicate)

[INFO] |  |  \- com.fasterxml.jackson.module:jackson-module-parameter-names:jar:2.9.5:compile

[INFO] |  |     +- (com.fasterxml.jackson.core:jackson-core:jar:2.9.5:compile - omitted for duplicate)

[INFO] |  |     \- (com.fasterxml.jackson.core:jackson-databind:jar:2.9.5:compile - omitted for duplicate)

[INFO] |  +- org.springframework.boot:spring-boot-starter-tomcat:jar:2.0.2.RELEASE:compile

[INFO] |  |  +- (javax.annotation:javax.annotation-api:jar:1.3.2:compile - omitted for duplicate)

[INFO] |  |  +- org.apache.tomcat.embed:tomcat-embed-core:jar:8.5.31:compile

[INFO] |  |  +- org.apache.tomcat.embed:tomcat-embed-el:jar:8.5.31:compile

[INFO] |  |  \- org.apache.tomcat.embed:tomcat-embed-websocket:jar:8.5.31:compile

[INFO] |  |     \- (org.apache.tomcat.embed:tomcat-embed-core:jar:8.5.31:compile - omitted for duplicate)

[INFO] |  +- org.hibernate.validator:hibernate-validator:jar:6.0.9.Final:compile

[INFO] |  |  +- javax.validation:validation-api:jar:2.0.1.Final:compile

[INFO] |  |  +- org.jboss.logging:jboss-logging:jar:3.3.2.Final:compile

[INFO] |  |  \- com.fasterxml:classmate:jar:1.3.4:compile

[INFO] |  +- org.springframework:spring-web:jar:5.0.6.RELEASE:compile

[INFO] |  |  +- org.springframework:spring-beans:jar:5.0.6.RELEASE:compile

[INFO] |  |  |  \- (org.springframework:spring-core:jar:5.0.6.RELEASE:compile - omitted for duplicate)

[INFO] |  |  \- (org.springframework:spring-core:jar:5.0.6.RELEASE:compile - omitted for duplicate)

[INFO] |  \- org.springframework:spring-webmvc:jar:5.0.6.RELEASE:compile

[INFO] |     +- org.springframework:spring-aop:jar:5.0.6.RELEASE:compile

[INFO] |     |  +- (org.springframework:spring-beans:jar:5.0.6.RELEASE:compile - omitted for duplicate)

[INFO] |     |  \- (org.springframework:spring-core:jar:5.0.6.RELEASE:compile - omitted for duplicate)

[INFO] |     +- (org.springframework:spring-beans:jar:5.0.6.RELEASE:compile - omitted for duplicate)

[INFO] |     +- org.springframework:spring-context:jar:5.0.6.RELEASE:compile

[INFO] |     |  +- (org.springframework:spring-aop:jar:5.0.6.RELEASE:compile - omitted for duplicate)

[INFO] |     |  +- (org.springframework:spring-beans:jar:5.0.6.RELEASE:compile - omitted for duplicate)

[INFO] |     |  +- (org.springframework:spring-core:jar:5.0.6.RELEASE:compile - omitted for duplicate)

[INFO] |     |  \- (org.springframework:spring-expression:jar:5.0.6.RELEASE:compile - omitted for duplicate)

[INFO] |     +- (org.springframework:spring-core:jar:5.0.6.RELEASE:compile - omitted for duplicate)

[INFO] |     +- org.springframework:spring-expression:jar:5.0.6.RELEASE:compile

[INFO] |     |  \- (org.springframework:spring-core:jar:5.0.6.RELEASE:compile - omitted for duplicate)

[INFO] |     \- (org.springframework:spring-web:jar:5.0.6.RELEASE:compile - omitted for duplicate)

[INFO] +- log4j:log4j:jar:1.2.17:compile

[INFO] +- commons-lang:commons-lang:jar:2.0:compile

[INFO] +- commons-io:commons-io:jar:1.3.2:compile

[INFO] +- javassist:javassist:jar:3.12.1.GA:compile

[INFO] +- org.mockito:mockito-core:jar:1.9.5:test

[INFO] |  +- org.hamcrest:hamcrest-core:jar:1.1:test

[INFO] |  \- org.objenesis:objenesis:jar:1.0:test

[INFO] +- junit:junit:jar:4.12:test

[INFO] |  \- (org.hamcrest:hamcrest-core:jar:1.3:test - omitted for conflict with 1.1)

[INFO] +- org.hamcrest:hamcrest-all:jar:1.3:test

[INFO] +- info.cukes:cucumber-junit:jar:1.2.5:test

[INFO] |  +- info.cukes:cucumber-core:jar:1.2.5:test

[INFO] |  |  +- info.cukes:cucumber-html:jar:0.2.3:test

[INFO] |  |  +- info.cukes:cucumber-jvm-deps:jar:1.0.5:test

[INFO] |  |  \- info.cukes:gherkin:jar:2.12.2:test

[INFO] |  \- (junit:junit:jar:4.12:test - omitted for duplicate)

[INFO] \- info.cukes:cucumber-java:jar:1.2.5:test

[INFO]    \- (info.cukes:cucumber-core:jar:1.2.5:test - omitted for duplicate)

Can anyone help me resolve this issue?

Thanks,

Charles.

[Charles Berger]

Problem solved.  I deleted the Eclipse .classpath file and forced it to be recreated by running mvn eclipse:eclipse and that resolved the issue.