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时间:2015-11-01 07:54
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为什么要用zookeeper
zookeeper集群起不起来_百度知道
zookeeper集群起不起来
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data# the port at which the clients will connectclientPort=2181# ZooKeeper server and its port no, built&conf/.2=127, /,zookeeperB,允许follower同步:2888;zookeeper/,同时用于集群的myid文件也存在这个文件夹里(注意.3=127,为了确保连接存在的,如果ZooKeeper管理的数据较大; file in the dataDir # use hostname instead of IP address for convenient maintenance zookeeperA/myuser/:别名jsonlive_>,transaction log分离可以避免和普通log还有快照的竞争syncLimit.sh start查看zookeeper状态[root@weibo bin]# sh zkServer,复制zookeeperconf下zoo_sample:] - INFO
[main.cfg为zoo:zookeeper,则应相应增大这个值clientPort:当solr服务器启动的时候.,分别重名名为zookeeperA.0,没有关系.cfg
(3)修改zoo,connection refused.1:用于存放内存数据库快照的文件夹,你可以观察bin下的zookeeper.cfg# The number of milliseconds of each ticktickTime=2000# The number of ticks that the initial # synchronization phase can takeinitLimit=10# The number of ticks that can pass between # sending a request and getting an acknowledgementsyncLimit=5# the directory where the snapshot is stored,以毫秒为单位:一个配置文件只能包含一个dataDir字样.0,zookeeperC:00(1)解压为zookeepertar -xf -C /home/.1=127.tmp here is just #bin/datasudo sh -c ':保存上传的配置文件信息clusterstate,zookeeperC为3(5)启动zookeepercd /。(6)客户端连接zookeeper[root@weibo bin]# sh zkCli:3988 server,即使它被注释掉了;zookeeperA/,会注册到这里home/,启动第一台zookeeper后,则会被丢弃.version=3,最小超时时间为两个心跳时间initLimit:心跳时间. # ZooKeeper ensemble should know about every other machine in the ensemble # specify server id by creating ':2988;myuser/home/.out可以看到报错;home/weibo/:节点选举collections。(4)创建myid文件cd /1".cfgcd /.4;
其他文件夹类似创建myid文件.5-1392090.sh Connecting to localhost,依次启动另外两台zookeeper:25;myuser/: /。 (2)编辑对应的zookeeper配置文件:用于单独设置transaction log的目录:2181 15.0,zooB.1,zookeeper需要等待其他另个节点的加入;zookeeperA/:2088;myid'复制zookeeper文件夹3份:3888zoo.0:保存shard信息overseer_home/:集群状态jsonzooA/:多少个心跳时间内,如果follower落后太多: follower启动OK。 并且创建数据快照以及日志存放文件夹.1,全部启动之后就正常了;myuser/,363 [myid,允许其他server连接并初始化数据; >.# do not use /:服务的监听端口dataDbinsudo sh
zkSmyuser/:3088## Be sure to read the maintenance section of the # administrator guide before turning>.json./:Environment@100] - C myid'tickThome/.cfgMzooA/.0,zookeeperB为2:多少个tickTime内.sh statusJMX enabled by defaultUsing config,zooC;echo "。)dataLogDconfcp zoo_sample.0.dataDir=/,命名为zooA
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→ 正文内容 zookeeper锁服务
使用curator实现zookeeper锁服务的示例分享
这篇文章主要介绍了使用curator实现zookeeper锁服务的示例,需要的朋友可以参考下
代码如下:import java.util.concurrent.CountDownLimport java.util.concurrent.ExecutorSimport java.util.concurrent.Eimport java.util.concurrent.TimeU
import com.netflix.curator.RetryPimport com.netflix.curator.framework.CuratorFimport com.netflix.curator.framework.CuratorFrameworkFimport com.netflix.curator.framework.recipes.locks.InterProcessMimport com.netflix.curator.retry.ExponentialBackoffR
public class TestCuratorLock {
&/**& * @param args& * @throws InterruptedException& */&public static void main(String[] args) throws InterruptedException {& // TODO Auto-generated method stub
& CountDownLatch latch = new CountDownLatch(5);
& String zookeeperConnectionString = "localhost:2181,localhost:2182,localhost:2183";& RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 3);& CuratorFramework client = CuratorFrameworkFactory.newClient(&&& zookeeperConnectionString, retryPolicy);& client.start();& System.out.println("客户端启动。。。。");& ExecutorService exec = Executors.newCachedThreadPool();
& for (int i = 0; i & 5; i++) {&& exec.submit(new MyLock("client" + i, client, latch));& }
& exec.shutdown();& latch.await();& System.out.println("所有任务执行完毕");
& client.close();
& System.out.println("客户端关闭。。。。");
&static class MyLock implements Runnable {
& private S
& private CuratorF
& private CountDownL
& public MyLock(String name, CuratorFramework client, CountDownLatch latch) {&& this.name =&& this.client =&& this.latch =& }
& public String getName() {&&& }
& public void setName(String name) {&& this.name =& }
& @Override& public void run() {&& // TODO Auto-generated method stub&& InterProcessMutex lock = new InterProcessMutex(client,&&&& "/test_group");&& try {&&& if (lock.acquire(120, TimeUnit.SECONDS)) {&&&& try {&&&&& // do some work inside of the critical section here&&&&& System.out.println("----------" + this.name&&&&&&& + "获得资源----------");&&&&& System.out.println("----------" + this.name&&&&&&& + "正在处理资源----------");&&&&& Thread.sleep(10 * 1000);&&&&& System.out.println("----------" + this.name&&&&&&& + "资源使用完毕----------");&&&&& latch.countDown();&&&& } finally {&&&&& lock.release();&&&&& System.out.println("----------" + this.name&&&&&&& + "释放----------");&&&& }&&& }&& } catch (Exception e) {&&& // TODO Auto-generated catch block&&& e.printStackTrace();&& }&& }&}&}
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zookeeper-3.4.6总是启动不成功
发表于5个月前( 04:09)&&
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zookeeper-3.4.6总是启动不成功
jps显示有zookeeper进程
但是status显示启动失败
但是log里只有拒绝访问错误,为什么启动不了呢,请大神赐教
配置文件如下
然后用netstat -anp |grep 2678查看,发现端口未启动,但是端口是正常的。请大神赐教
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