java.lang.IncompatibleClassChangeError: Implementing class Mongo

Question

I am not able to figure out why I get this error. I tried cleaning up libs that are redundant and so forth.

I get the error when I try to do:

  mongo = new Mongo(host, port);

The funny thing is that I can run any unit tests I made from IDE (IntelliJ), but when I try to run it through Tomcat I get this:

  Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.
    sfatandrei.db.MongoManager]: Constructor threw exception; nested exception is java.lang.IncompatibleCla
    ssChangeError: Implementing class
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:162)
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInst
    antiationStrategy.java:110)
        at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(Constructo
    rResolver.java:280)
        ... 82 more
    Caused by: java.lang.IncompatibleClassChangeError: Implementing class
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2889)
        at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1170)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1678)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2889)
        at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1170)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1678)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
        at com.mongodb.MongoOptions.reset(MongoOptions.java:47)
        at com.mongodb.MongoOptions.<init>(MongoOptions.java:29)
        at com.mongodb.Mongo.<init>(Mongo.java:148)
        at com.mongodb.Mongo.<init>(Mongo.java:137)
        at com.sfatandrei.db.MongoManager.<init>(MongoManager.java:28)
        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 org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
        ... 84 more

mvn dependency:tree -Dverbose

[INFO] 
[INFO] --- maven-dependency-plugin:2.1:tree (default-cli) @ mongodb-performance-test ---
[INFO] com.sfatandrei:mongodb-performance-test:war:1.0
[INFO] +- junit:junit:jar:4.8.2:test
[INFO] +- org.springframework:spring-core:jar:3.1.1.RELEASE:compile
[INFO] |  +- org.springframework:spring-asm:jar:3.1.1.RELEASE:compile
[INFO] |  \- (commons-logging:commons-logging:jar:1.1.1:compile - omitted for duplicate)
[INFO] +- org.springframework:spring-beans:jar:3.1.1.RELEASE:compile
[INFO] |  \- (org.springframework:spring-core:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] +- org.springframework:spring-context:jar:3.1.1.RELEASE:compile
[INFO] |  +- org.springframework:spring-aop:jar:3.1.1.RELEASE:compile
[INFO] |  |  +- (aopalliance:aopalliance:jar:1.0:compile - omitted for duplicate)
[INFO] |  |  +- (org.springframework:spring-asm:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  |  +- (org.springframework:spring-beans:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  |  \- (org.springframework:spring-core:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  +- (org.springframework:spring-beans:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  +- (org.springframework:spring-core:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  +- org.springframework:spring-expression:jar:3.1.1.RELEASE:compile
[INFO] |  |  \- (org.springframework:spring-core:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  \- (org.springframework:spring-asm:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] +- org.springframework:spring-jdbc:jar:3.1.1.RELEASE:compile
[INFO] |  +- (org.springframework:spring-beans:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  +- (org.springframework:spring-core:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  \- org.springframework:spring-tx:jar:3.1.1.RELEASE:compile
[INFO] |     +- (aopalliance:aopalliance:jar:1.0:compile - omitted for duplicate)
[INFO] |     +- (org.springframework:spring-aop:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |     +- (org.springframework:spring-beans:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |     +- (org.springframework:spring-context:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |     \- (org.springframework:spring-core:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] +- org.springframework:spring-web:jar:3.1.1.RELEASE:compile
[INFO] |  +- aopalliance:aopalliance:jar:1.0:compile
[INFO] |  +- (org.springframework:spring-beans:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  +- (org.springframework:spring-context:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  \- (org.springframework:spring-core:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] +- org.springframework:spring-webmvc:jar:3.1.1.RELEASE:compile
[INFO] |  +- (org.springframework:spring-asm:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  +- (org.springframework:spring-beans:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  +- (org.springframework:spring-context:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  +- org.springframework:spring-context-support:jar:3.1.1.RELEASE:compile
[INFO] |  |  +- (org.springframework:spring-beans:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  |  +- (org.springframework:spring-context:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  |  \- (org.springframework:spring-core:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  +- (org.springframework:spring-core:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  +- (org.springframework:spring-expression:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  \- (org.springframework:spring-web:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] +- org.springframework.data:spring-data-mongodb:jar:1.0.0.RELEASE:compile
[INFO] |  +- (org.springframework:spring-beans:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  +- (org.springframework:spring-expression:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  +- org.springframework.data:spring-data-commons-core:jar:1.2.0.RELEASE:compile
[INFO] |  |  +- (org.springframework:spring-beans:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  |  \- (org.springframework:spring-tx:jar:3.1.1.RELEASE:compile - omitted for duplicate)
[INFO] |  \- org.mongodb:mongo-java-driver:jar:2.7.1:compile
[INFO] +- log4j:log4j:jar:1.2.16:compile
[INFO] +- org.springframework:spring-test:jar:3.1.1.RELEASE:compile
[INFO] +- commons-logging:commons-logging:jar:1.1.1:compile
[INFO] +- javax.servlet:servlet-api:jar:2.5:provided
[INFO] +- org.mongodb:bson:jar:2.3:compile
[INFO] \- org.codehaus.jackson:jackson-mapper-asl:jar:1.9.6:compile
[INFO]    \- org.codehaus.jackson:jackson-core-asl:jar:1.9.6:compile

I am using jdk 7, tomcat 7.0.27, maven 3.0.3.

Generally that error is due to compiling with one set of JAR files and running against a different set. It could be your class or one of the classes in one of the JARs you use. Unfortunately, it doesn't appear to be telling us which class took the error. — Hot Licks
– Hot Licks, Commented May 7, 2012 at 1:24
@HotLicks, actually, it says which class took the error: at com.mongodb.MongoOptions.reset(MongoOptions.java:47) — Andrei Sfat
– Andrei Sfat, Commented May 7, 2012 at 5:44
No, that's where the error occurred. But the error occurred on the class being loaded, whatever that was. If you can examine the code at that point you may be able to decipher what class was being loaded. — Hot Licks
– Hot Licks, Commented May 7, 2012 at 11:32
@HotLicks, thinking of excluding each depedency inside pom.xml that are described by mvn dependency:tree as duplicate. Update coming soon regarding this. — Andrei Sfat
– Andrei Sfat, Commented May 7, 2012 at 11:46

Community · Accepted Answer · 2017-05-23 12:00:25Z

21

That looks like an error of byte code level. Maybe you have two versions of the same library in your tomcat server.

See: What causes java.lang.IncompatibleClassChangeError?

edited May 23, 2017 at 12:00

CommunityBot

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answered May 7, 2012 at 0:25

James Gan

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1 Comment

Andrei Sfat Over a year ago

it seems that mongo-java-driver has inside a class that uses org.bson and I added myself bson dependency and that was interfering

Zds · Accepted Answer · 2012-08-28 14:16:08Z

2

If you get this problem under JBoss, it's most likely due to the fact that JBoss bundles RESTeasy REST implementation as default. If you package your own REST library to EAR/WAR file, you need to disable the default RESTeasy for your deployed library to work.

answered Aug 28, 2012 at 14:16

Zds

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