org.apache.curator.framework.listen.ListenerContainer.addListener的解决方法

Posted 2022-09-06 纵横千里，捭阖四方

最近将几个服务注册到网关，需要增加zookeeper的jar包，有个服务升级之后一直报如下的错误：

Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

    org.apache.curator.framework.listen.ListenerContainer.addListener(ListenerContainer.java:40)

The following method did not exist:

    com.google.common.util.concurrent.MoreExecutors.sameThreadExecutor()Lcom/google/common/util/concurrent/ListeningExecutorService;

The calling method's class, org.apache.curator.framework.listen.ListenerContainer, was loaded from the following location:

    jar:file:/Users/liuqingchao/.m2/repository/org/apache/curator/curator-framework/2.9.1/curator-framework-2.9.1.jar!/org/apache/curator/framework/listen/ListenerContainer.class

The called method's class, com.google.common.util.concurrent.MoreExecutors, is available from the following locations:

    jar:file:/Users/liuqingchao/.m2/repository/com/google/guava/guava/26.0-android/guava-26.0-android.jar!/com/google/common/util/concurrent/MoreExecutors.class

The called method's class hierarchy was loaded from the following locations:

    com.google.common.util.concurrent.MoreExecutors: file:/Users/liuqingchao/.m2/repository/com/google/guava/guava/26.0-android/guava-26.0-android.jar


Action:

Correct the classpath of your application so that it contains compatible versions of the classes org.apache.curator.framework.listen.ListenerContainer and com.google.common.util.concurrent.MoreExecutors

看起来这里问题是找一个类没找到，根据提示是在：curator-framework/2.9.1/curator-framework-2.9.1.jar!/org/apache/curator/framework/listen/这个路径下找类ListenerContainer.class，没找到，然后后面提示com/google/guava/guava/26.0-android/guava-26.0-android里有这个类，此时试图修改exclude等来将类定向到guava，或者排除掉curator2.9.1，但是均已失败告终。

之后将curator升级到4.0.1，还是不解决问题，有些基础包还是依赖2.9.1,所以必须手动将其都升到4.0.1。

同时，根据同事的提示，将guava版本降低到20：

            <dependency>
                <groupId>com.google.guava</groupId>
                <artifactId>guava</artifactId>
                <version>20.0</version>
            </dependency>

仍然解决不了问题。

其实上面的错误提示信息是有误导的，我们不应该让curator去使用guava里的类，而应该想办法将curator从2.9.1全部升级到4.0.1版本。

尝试了很多次，发现只要在zookeeper-discovery-starter前指定org.apache.curator的版本号就可以了。完整代码：

    <dependency>
                <groupId>org.apache.curator</groupId>
                <artifactId>curator-framework</artifactId>
                <version>4.0.1</version>
            </dependency>
            <dependency>
                <groupId>org.apache.curator</groupId>
                <artifactId>curator-recipes</artifactId>
                <version>4.0.1</version>
            </dependency>
            <dependency>
                <groupId>org.apache.curator</groupId>
                <artifactId>curator-client</artifactId>
                <version>4.0.1</version>
            </dependency>
            <dependency>
                <groupId>com.****</groupId>
                <artifactId>zookeeper-discovery-starter</artifactId>
                <version>spring-2.x-curator-4.0.1-1.1.RELEASE</version>
            </dependency>

这种问题很多时候是试出来的，记录一下，后面遇到类似的就可以参考了。