问题
I have a Java webservice running in Tomcat 6 which accepts JSON input. I am trying to use Jackson ObjectMapper to parse the input json. But when initializing the ObjectMapper object I am getting this error
16:08:13,616 ERROR [[jersey]] Servlet.service() for servlet jersey threw exception
java.lang.VerifyError: Cannot inherit from final class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2733)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1124)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1612)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491)
at com.test.project.offline.ws.WsApiResource.updateData(WsApiResource.java:169)
.......
At line 169 I have this ObjectMapper mapper = new ObjectMapper();
When calling com.test.project.offline.ws.WsApiResource.updateData() method locally in a unit test it works without any error.
Kindly help me in fixing this. I am using Jackson 1.8.4 and tomcat 6.
UPDATE: Fixed the issue. Problem was a different version of jackson in the dependency tree. Excluding it fixed the problem.
回答1:
I also had the same issue with Apache Lucene. I had lucene-core-3.6.0.jar and lucene-core-3.5.0.jar in my /WEB-INF/lib folder. Removing one or the other also fixed my problem. It must be a versioning issue.
回答2:
I had the same issue with Apache Solr, and it was resolved by deleting my ~/.m2 cache.
This issue was also caused by specifying the wrong version of a dependency in my pom.xml file, where another package was automatically downloading another version.
Maven really should have some sort of conflicting versions of dependency resolution scheme...
回答3:
The same for me - my ejb3 application uses jackson-all-1.9.4 - and my glassfish container (v2.1) contains a lib/jackson-asl-0.9.4.jar:
java.lang.VerifyError: Cannot inherit from final class
Now, I have replaced jackson-all with gson.
Thanks,
Danny
回答4:
Neil has a great answer to this question. However, aside from your M2 cache, check if you're a complete DUMMY like I WAS and insure your POM doesn't include say 2 packages where the Same Final class is declared. Google API's are notorious for cross including classes in their API Jars. Insure you delete EVERYTHING you don't need!
来源：https://stackoverflow.com/questions/7766614/jackson-tomcat-java-lang-verifyerror-cannot-inherit-from-final-class