NoSuchMethodError: org.codehaus.jackson.type.JavaType

问题

My application is throwing the error below, although I have in my app the jackson-core-asl-1.4.2 and jackson-mapper-asl-1.4.2

Caused by: java.lang.NoSuchMethodError: org.codehaus.jackson.type.JavaType.<init>(Ljava/lang/Class;)V
    at org.codehaus.jackson.map.type.SimpleType.<init>(SimpleType.java:32)
    at org.codehaus.jackson.map.type.TypeFactory._fromClass(TypeFactory.java:254)
    at org.codehaus.jackson.map.type.TypeFactory._fromType(TypeFactory.java:266)
    at org.codehaus.jackson.map.type.TypeFactory.type(TypeFactory.java:57)
    at org.codehaus.jackson.map.ObjectMapper.<clinit>(ObjectMapper.java:49)
    at org.springframework.web.servlet.view.json.MappingJacksonJsonView.<init>(MappingJacksonJsonView.java:59)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
    at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance_(Runtime.java:126)
    at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance(Runtime.java:134)
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
    ... 48 more
.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
    at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance_(Runtime.java:126)
    at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance(Runtime.java:134)
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
    ... 48 more

What could be the reason? It's really weird the application worked before and commited the codes to SVN then when I check-out and re-run everything I get this error...

回答1:

This looks almost certainly to be due to incompatible versions of 'core' and 'mapper' jars. You probably have incompatible versions in use via classpath.

回答2:

The problem you are having is due to an update in Google App Engine SDK (I think 1.6.1?).

I had the same problem, so I ran TattleTale to see if there are some dependency issues. Lo and behold, there is a conflict on the org.codehaus.* with the following 2 libraries:

google_sql.jar
jackson-core-asl-1.6.3.jar

While your jackson libraries are slightly different than mine, the issue remains the same. There are 2 fixes to this issue:

Remove google_sql.jar from war/webinf/lib directory. This will cause the SDK to fail validation checks, but if you ignore the red x's your code should run fine.
Update your GAE SDK to 1.6.2 or above. I think they fixed the issue in later SDK's but the updates also introduced some compiler warnings so look before you leap.

来源：https://stackoverflow.com/questions/11784051/nosuchmethoderror-org-codehaus-jackson-type-javatype

标签

java

Spring

google-app-engine

jackson