I have a web application that deploys perfectly fine on my local machine's tomcat(8.0.20). However, when I put it into the qa environment (tomcat - 8.0.20), it kept on giving me the IncompatibleClassChangeError and it was complaining that I was extending on an interface. This interface was changed to an abstract class. And I compiled the parent and child classes and still I kept on getting the same issue. Finally, I wanted to debug, so, I changed the version on the parent to x.0.1-SNAPSHOT and then compiled everything and now it is working. If someone is still hitting the problem after following the answers given here, please make sure the versions in your pom.xml are also correct. Change the versions to see if that works. If so, then fix the version problem.

如果你使用scala和sbt和scala-logging作为依赖项，那么这可能会发生，因为scala-logging的早期版本的名称是scala-logging-api.因此，本质上依赖项解析不会发生，因为不同的名称会导致启动scala应用程序时的运行时错误。

I have a web application that deploys perfectly fine on my local machine's tomcat(8.0.20). However, when I put it into the qa environment (tomcat - 8.0.20), it kept on giving me the IncompatibleClassChangeError and it was complaining that I was extending on an interface. This interface was changed to an abstract class. And I compiled the parent and child classes and still I kept on getting the same issue. Finally, I wanted to debug, so, I changed the version on the parent to x.0.1-SNAPSHOT and then compiled everything and now it is working. If someone is still hitting the problem after following the answers given here, please make sure the versions in your pom.xml are also correct. Change the versions to see if that works. If so, then fix the version problem.

我遇到了同样的问题，后来我发现我是在Java版本1.4上运行应用程序，而应用程序是在版本6上编译的。

实际上，这是因为有一个重复的库，一个位于类路径中，另一个包含在位于类路径中的jar文件中。

我得到这个错误是因为我有一个抽象基类，它承诺实现某个接口，但我忘记了添加接口方法的实现，然后我创建了一个非抽象(具体)字节码生成的类，它扩展了抽象类，也没有提供这些方法的实现。

当我尝试创建字节码生成类的实例时，JVM抱怨java.lang.IncompatibleClassChangeError。

幸运的是，该异常有一个“message”成员，它提供了关于出错原因的更详细信息。在我的例子中，消息清楚地说，特定的类应该实现特定的接口，但它实际上并没有实现它。

由于某种原因，当使用JNI并在调用Call*Method()时传递jclass参数而不是jobject时，也会抛出相同的异常。

这与《食人魔诗篇》第33篇中的回答相似。

void example(JNIEnv *env, jobject inJavaList) {
    jclass class_List = env->FindClass("java/util/List");

    jmethodID method_size = env->GetMethodID(class_List, "size", "()I");
    long size = env->CallIntMethod(class_List, method_size); // should be passing 'inJavaList' instead of 'class_List'

    std::cout << "LIST SIZE " << size << std::endl;
}

我知道在被问到这个问题5年后再回答这个问题有点晚了，但这是搜索java.lang.IncompatibleClassChangeError时最热门的问题之一，所以我想记录这个特殊情况。