记录一次Curator操作zookeeper的错误

在项目中使用到Apache Curator Framework连接Zookeeper 3.4.5服务器，使用的Curator Framework版本是4.3.0

<dependency>
      <groupId>org.apache.curator</groupId>
      <artifactId>curator-recipes</artifactId>
      <version>4.3.0</version>
 </dependency>

在使用CuratorFrameworkFactory代码，创建节点时报错：

Callable<Void> task = new Callable<Void>() {
                        @Override
                        public Void call() throws Exception {
                            CuratorFramework client = CuratorFrameworkFactory.newClient(CONNECTION_STRING, new ExponentialBackoffRetry(1000, 3, Integer.MAX_VALUE));
                            try {
                                client.start();
                                ExampleClientThatLocks example = new ExampleClientThatLocks(client, PATH, resource, "Client " + index);
                                for (int j = 0; j < REPETITIONS; ++j) {
                                    example.doWork(10, TimeUnit.SECONDS);
                                }
                            } catch (InterruptedException e) {
                                Thread.currentThread().interrupt();
                            } catch (Exception e) {
                                e.printStackTrace();
                            } finally {
                                CloseableUtils.closeQuietly(client);
                            }
                            return null;
                        }
                    };

报错内容如下：

org.apache.zookeeper.KeeperException$UnimplementedException: KeeperErrorCode = Unimplemented for /examples/lock/_c_a37f597e-4699-4aba-87e8-fc2f63eda649-lock-
    at org.apache.zookeeper.KeeperException.create(KeeperException.java:106)
    at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
    at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:1637)
    at org.apache.curator.framework.imps.CreateBuilderImpl$17.call(CreateBuilderImpl.java:1180)
    at org.apache.curator.framework.imps.CreateBuilderImpl$17.call(CreateBuilderImpl.java:1156)
    at org.apache.curator.connection.StandardConnectionHandlingPolicy.callWithRetry(StandardConnectionHandlingPolicy.java:67)
    at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:81)
    at org.apache.curator.framework.imps.CreateBuilderImpl.pathInForeground(CreateBuilderImpl.java:1153)
    at org.apache.curator.framework.imps.CreateBuilderImpl.protectedPathInForeground(CreateBuilderImpl.java:607)
    at org.apache.curator.framework.imps.CreateBuilderImpl.forPath(CreateBuilderImpl.java:597)
    at org.apache.curator.framework.imps.CreateBuilderImpl.forPath(CreateBuilderImpl.java:575)
    at org.apache.curator.framework.imps.CreateBuilderImpl.forPath(CreateBuilderImpl.java:51)
    at org.apache.curator.framework.recipes.locks.StandardLockInternalsDriver.createsTheLock(StandardLockInternalsDriver.java:54)
    at org.apache.curator.framework.recipes.locks.LockInternals.attemptLock(LockInternals.java:225)
    at org.apache.curator.framework.recipes.locks.InterProcessMutex.internalLock(InterProcessMutex.java:237)
    at org.apache.curator.framework.recipes.locks.InterProcessMutex.acquire(InterProcessMutex.java:108)
    at com.example.demo.test.ExampleClientThatLocks.doWork(ExampleClientThatLocks.java:23)
    at com.example.demo.test.LockingExample$1.call(LockingExample.java:37)
    at com.example.demo.test.LockingExample$1.call(LockingExample.java:29)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

google了一下才知道，Curator Framework的2.x.x版本和3.x.x版本对Zookeeper支持的版本是有差异的，查看Curator Framework的官网(http://curator.apache.org)，对于zookeeper 3.4.x服务器版本，只有Curator 2.x.x才支持，我使用的是Curator 4.3.0版本，不支持Zookeeper 3.4.5服务器，所以会抛出这个异常,将Curator中zk相关依赖去掉，并加入zk依赖。

解决方法：

<dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>4.3.0</version>
            <exclusions>
<!--去掉zk相关依赖-->
                <exclusion>
                    <groupId>org.apache.zookeeper</groupId>
                    <artifactId>zookeeper</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.5</version>
            <exclusions>
<!--zk和别的依赖也有冲突，也去掉-->
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-api</artifactId>
                </exclusion>
                <exclusion>
                    <artifactId>netty</artifactId>
                    <groupId>io.netty</groupId>
                </exclusion>
                <exclusion>
                    <groupId>com.github.spotbugs</groupId>
                    <artifactId>spotbugs-annotations</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>jline</groupId>
                    <artifactId>jline</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>log4j</groupId>
                    <artifactId>log4j</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.jboss.netty</groupId>
                    <artifactId>netty</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

问题解决！！！！