Zookeeper & Springboot 使用介绍
基础环境说明：
- SpringBoot : 2.3.4.RELEASE
- curator: 5.1.0
具体功能内容：
- 锁
- 选举
- Barrier
- 缓存
- 持久化节点
- 队列
一、Zookeeper基本介绍
二、基本操作
- create
- ls
- get
- set
- delete
public class CuratorClientTest {
private static final String ZK_ADDRESS = "127.0.0.1:2181";
private static final String ZK_PATH = "/zktest1";
public static void main(String[] args) throws Exception {
// Connect to zk
CuratorFramework client = CuratorFrameworkFactory.newClient(
ZK_ADDRESS,
new RetryNTimes(10, 5000)
);
client.start();
System.out.println("zk client start successfully!");
// Client API test
//Create node
String content = "hello";
print("create", ZK_PATH, content);
client.create().creatingParentsIfNeeded().forPath(ZK_PATH, content.getBytes());
// Get node and data
print("ls", "/");
print(client.getChildren().forPath("/"));
print("get", ZK_PATH);
print(client.getData().forPath(ZK_PATH));
// Modify data
String content2 = "world";
print("set", ZK_PATH, content2);
client.setData().forPath(ZK_PATH, content2.getBytes());
print("get", ZK_PATH);
print(client.getData().forPath(ZK_PATH));
//Remove node
print("delete", ZK_PATH);
client.delete().forPath(ZK_PATH);
print("ls", "/");
print(client.getChildren().forPath("/"));
}
private static void print(String... cmds) {
StringBuilder text = new StringBuilder("$ ");
for (String cmd : cmds) {
text.append(cmd).append(" ");
}
System.out.println(text.toString());
}
private static void print(Object result) {
System.out.println(
result instanceof byte[]
? new String((byte[]) result)
: result);
}
}
三、监听器
- Node Cache：监听当前节点的操作
- Path Cache：监听其子节点的操作
- Tree Cache：Node Cache+Path Cache，监听当前节点+及其子节点的操作
以下展示与SpringBoot的组合
- pom.xml，引入Curator客户端依赖
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>springboot-forall</artifactId>
<groupId>com.learning</groupId>
<version>1.0.0</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>boot-for-zookeeper</artifactId>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>8</source>
<target>8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-framework</artifactId>
<version>5.1.0</version>
</dependency>
<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-recipes</artifactId>
<version>5.1.0</version>
</dependency>
<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-client</artifactId>
<version>5.1.0</version>
</dependency>
</dependencies>
</project>
- application.properties 配置连接参数
server.port=2182
spring.application.name=spring-boot-zookeeper
zookeeper.connectString=localhost:2181
zookeeper.maxRetries=3
zookeeper.baseSleepTimeMs=1000
- 步骤2对应的配置类
@Configuration
@ConfigurationProperties(prefix = "zookeeper")
public class ZookeeperConfig {
private String connectString;
private Integer maxRetries;
private Integer baseSleepTimeMs;
public String getConnectString() {
return connectString;
}
public void setConnectString(String connectString) {
this.connectString = connectString;
}
public Integer getMaxRetries() {
return maxRetries;
}
public void setMaxRetries(Integer maxRetries) {
this.maxRetries = maxRetries;
}
public Integer getBaseSleepTimeMs() {
return baseSleepTimeMs;
}
public void setBaseSleepTimeMs(Integer baseSleepTimeMs) {
this.baseSleepTimeMs = baseSleepTimeMs;
}
}
- Client工厂类
@Component
public class ZookeeperFactory implements FactoryBean<CuratorFramework> {
private ZookeeperConfig zookeeperConfig;
private CuratorFramework curatorClient;
@PostConstruct
public void init() {
ExponentialBackoffRetry backoffRetry = new ExponentialBackoffRetry(zookeeperConfig.getMaxRetries(), zookeeperConfig.getBaseSleepTimeMs());
curatorClient = CuratorFrameworkFactory.builder().connectString(zookeeperConfig.getConnectString()).retryPolicy(backoffRetry).build();
curatorClient.start();
}
@Override
public CuratorFramework getObject() throws Exception {
return curatorClient;
}
@Override
public Class<?> getObjectType() {
return CuratorFramework.class;
}
@Autowired
public void setZookeeperConfig(ZookeeperConfig zookeeperConfig) {
this.zookeeperConfig = zookeeperConfig;
}
}
- 开启三种监听器
@Component
public class ZkListener {
@Resource
private CuratorFramework curatorClient;
@PostConstruct
public void init(){
String path = "/zktest";
//当前节点
CuratorCache curatorCache = CuratorCache.builder(curatorClient, path).build();
CuratorCacheListener listener = CuratorCacheListener
.builder()
.forNodeCache(new NodeCacheListener(){
@Override
public void nodeChanged() throws Exception{
Optional<ChildData> childData = curatorCache.get(path);
if(childData.isPresent()) {
String data = new String(childData.get().getData());
System.out.println("--------【NodeCacheListener--------】---------nodePath:" + path + " data:" + data);
}
}
})
.build();
curatorCache.listenable().addListener(listener);
//监听子节点，不监听当前节点
CuratorCacheListener pathCacheListener = CuratorCacheListener
.builder()
.forPathChildrenCache(path, curatorClient, new PathChildrenCacheListener() {
@Override
public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception {
String type = event.getType().name();
System.out.println("--------【PathChildrenCacheListener】-------- type:" + type);
Optional.ofNullable(event.getData()).ifPresent(childata -> {
String nodePath = childata.getPath();
String data = "";
if(Objects.nonNull(childata.getData())) {
data = new String(childata.getData());
}
System.out.println("--------【PathChildrenCacheListener】-------- nodePath:" + nodePath + " data:" + data + " type:" + type);
});
}
})
.build();
curatorCache.listenable().addListener(pathCacheListener);
CuratorCacheListener treeListener = CuratorCacheListener
.builder()
.forTreeCache(curatorClient, new TreeCacheListener() {
@Override
public void childEvent(CuratorFramework client, TreeCacheEvent event) throws Exception {
String type = event.getType().name();
System.out.println("--------【TreeCacheListener--------】-------- type:" + type);
Optional.ofNullable(event.getData()).ifPresent(childata -> {
String nodePath = childata.getPath();
String data = "";
if(Objects.nonNull(childata.getData())) {
data = new String(childata.getData());
}
System.out.println("--------【TreeCacheListener--------】-------- nodePath:" + nodePath + " data:" + data + " type:" + type);
});
}
})
.build();
curatorCache.listenable().addListener(treeListener);
curatorCache.start();
}
}
- 最终测试，关于zk的操作可以使用上面的基本操作类进行测试，或者直接通过zkCli连接后进行操作
Connected to the target VM, address: '127.0.0.1:49879', transport: 'socket'
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.3.4.RELEASE)
2021-04-02 15:53:14.983 INFO 25462 --- [ main] com.learning.zookeeper.ZkApplication : Starting ZkApplication on fiboMBP004 with PID 25462 (/Users/chenzy/files/gitFile/springboot-forall/boot-for-zookeeper/target/classes started by chenzy in /Users/chenzy/files/gitFile/springboot-forall)
2021-04-02 15:53:14.987 INFO 25462 --- [ main] com.learning.zookeeper.ZkApplication : No active profile set, falling back to default profiles: default
2021-04-02 15:53:15.833 INFO 25462 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 2182 (http)
2021-04-02 15:53:15.841 INFO 25462 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-04-02 15:53:15.841 INFO 25462 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.38]
2021-04-02 15:53:15.905 INFO 25462 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-04-02 15:53:15.906 INFO 25462 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 872 ms
2021-04-02 15:53:15.954 WARN 25462 --- [ main] o.a.c.retry.ExponentialBackoffRetry : maxRetries too large (1000). Pinning to 29
2021-04-02 15:53:16.009 INFO 25462 --- [ main] o.a.c.f.imps.CuratorFrameworkImpl : Starting
2021-04-02 15:53:16.016 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:zookeeper.version=3.6.0--b4c89dc7f6083829e18fae6e446907ae0b1f22d7, built on 02/25/2020 14:38 GMT
2021-04-02 15:53:16.016 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:host.name=192.168.7.106
2021-04-02 15:53:16.016 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:java.version=1.8.0_181
2021-04-02 15:53:16.016 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:java.vendor=Oracle Corporation
2021-04-02 15:53:16.016 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre
2021-04-02 15:53:16.016 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/chenzy/files/gitFile/springboot-forall/boot-for-zookeeper/target/classes:/Users/chenzy/.m2/repository/org/springframework/boot/spring-boot-starter/2.3.4.RELEASE/spring-boot-starter-2.3.4.RELEASE.jar:/Users/chenzy/.m2/repository/org/springframework/boot/spring-boot/2.3.4.RELEASE/spring-boot-2.3.4.RELEASE.jar:/Users/chenzy/.m2/repository/org/springframework/spring-context/5.2.9.RELEASE/spring-context-5.2.9.RELEASE.jar:/Users/chenzy/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.3.4.RELEASE/spring-boot-autoconfigure-2.3.4.RELEASE.jar:/Users/chenzy/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.3.4.RELEASE/spring-boot-starter-logging-2.3.4.RELEASE.jar:/Users/chenzy/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/chenzy/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/chenzy/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.13.3/log4j-to-slf4j-2.13.3.jar:/Users/chenzy/.m2/repository/org/apache/logging/log4j/log4j-api/2.13.3/log4j-api-2.13.3.jar:/Users/chenzy/.m2/repository/org/slf4j/jul-to-slf4j/1.7.30/jul-to-slf4j-1.7.30.jar:/Users/chenzy/.m2/repository/jakarta/annotation/jakarta.annotation-api/1.3.5/jakarta.annotation-api-1.3.5.jar:/Users/chenzy/.m2/repository/org/springframework/spring-core/5.2.9.RELEASE/spring-core-5.2.9.RELEASE.jar:/Users/chenzy/.m2/repository/org/springframework/spring-jcl/5.2.9.RELEASE/spring-jcl-5.2.9.RELEASE.jar:/Users/chenzy/.m2/repository/org/yaml/snakeyaml/1.26/snakeyaml-1.26.jar:/Users/chenzy/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.3.4.RELEASE/spring-boot-starter-web-2.3.4.RELEASE.jar:/Users/chenzy/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.3.4.RELEASE/spring-boot-starter-json-2.3.4.RELEASE.jar:/Users/chenzy/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.11.2/jackson-databind-2.11.2.jar:/Users/chenzy/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.11.2/jackson-annotations-2.11.2.jar:/Users/chenzy/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.11.2/jackson-core-2.11.2.jar:/Users/chenzy/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.11.2/jackson-datatype-jdk8-2.11.2.jar:/Users/chenzy/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.11.2/jackson-datatype-jsr310-2.11.2.jar:/Users/chenzy/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.11.2/jackson-module-parameter-names-2.11.2.jar:/Users/chenzy/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.3.4.RELEASE/spring-boot-starter-tomcat-2.3.4.RELEASE.jar:/Users/chenzy/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.38/tomcat-embed-core-9.0.38.jar:/Users/chenzy/.m2/repository/org/glassfish/jakarta.el/3.0.3/jakarta.el-3.0.3.jar:/Users/chenzy/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.38/tomcat-embed-websocket-9.0.38.jar:/Users/chenzy/.m2/repository/org/springframework/spring-web/5.2.9.RELEASE/spring-web-5.2.9.RELEASE.jar:/Users/chenzy/.m2/repository/org/springframework/spring-beans/5.2.9.RELEASE/spring-beans-5.2.9.RELEASE.jar:/Users/chenzy/.m2/repository/org/springframework/spring-webmvc/5.2.9.RELEASE/spring-webmvc-5.2.9.RELEASE.jar:/Users/chenzy/.m2/repository/org/springframework/spring-aop/5.2.9.RELEASE/spring-aop-5.2.9.RELEASE.jar:/Users/chenzy/.m2/repository/org/springframework/spring-expression/5.2.9.RELEASE/spring-expression-5.2.9.RELEASE.jar:/Users/chenzy/.m2/repository/org/apache/curator/curator-framework/5.1.0/curator-framework-5.1.0.jar:/Users/chenzy/.m2/repository/org/apache/curator/curator-recipes/5.1.0/curator-recipes-5.1.0.jar:/Users/chenzy/.m2/repository/org/apache/curator/curator-client/5.1.0/curator-client-5.1.0.jar:/Users/chenzy/.m2/repository/org/apache/zookeeper/zookeeper/3.6.0/zookeeper-3.6.0.jar:/Users/chenzy/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/chenzy/.m2/repository/org/apache/zookeeper/zookeeper-jute/3.6.0/zookeeper-jute-3.6.0.jar:/Users/chenzy/.m2/repository/org/apache/yetus/audience-annotations/0.5.0/audience-annotations-0.5.0.jar:/Users/chenzy/.m2/repository/io/netty/netty-handler/4.1.52.Final/netty-handler-4.1.52.Final.jar:/Users/chenzy/.m2/repository/io/netty/netty-common/4.1.52.Final/netty-common-4.1.52.Final.jar:/Users/chenzy/.m2/repository/io/netty/netty-resolver/4.1.52.Final/netty-resolver-4.1.52.Final.jar:/Users/chenzy/.m2/repository/io/netty/netty-buffer/4.1.52.Final/netty-buffer-4.1.52.Final.jar:/Users/chenzy/.m2/repository/io/netty/netty-transport/4.1.52.Final/netty-transport-4.1.52.Final.jar:/Users/chenzy/.m2/repository/io/netty/netty-codec/4.1.52.Final/netty-codec-4.1.52.Final.jar:/Users/chenzy/.m2/repository/io/netty/netty-transport-native-epoll/4.1.52.Final/netty-transport-native-epoll-4.1.52.Final.jar:/Users/chenzy/.m2/repository/io/netty/netty-transport-native-unix-common/4.1.52.Final/netty-transport-native-unix-common-4.1.52.Final.jar:/Users/chenzy/.m2/repository/log4j/log4j/1.2.17/log4j-1.2.17.jar:/Users/chenzy/.m2/repository/com/google/guava/guava/27.0.1-jre/guava-27.0.1-jre.jar:/Users/chenzy/.m2/repository/com/google/guava/failureaccess/1.0.1/failureaccess-1.0.1.jar:/Users/chenzy/.m2/repository/com/google/guava/listenablefuture/9999.0-empty-to-avoid-conflict-with-guava/listenablefuture-9999.0-empty-to-avoid-conflict-with-guava.jar:/Users/chenzy/.m2/repository/com/google/code/findbugs/jsr305/3.0.2/jsr305-3.0.2.jar:/Users/chenzy/.m2/repository/org/checkerframework/checker-qual/2.5.2/checker-qual-2.5.2.jar:/Users/chenzy/.m2/repository/com/google/errorprone/error_prone_annotations/2.2.0/error_prone_annotations-2.2.0.jar:/Users/chenzy/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/chenzy/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.17/animal-sniffer-annotations-1.17.jar:/Users/chenzy/.m2/repository/org/slf4j/slf4j-api/1.7.30/slf4j-api-1.7.30.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar:/Users/chenzy/Library/Caches/IntelliJIdea2018.3/captureAgent/debugger-agent.jar
2021-04-02 15:53:16.016 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:java.library.path=/Users/chenzy/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:.
2021-04-02 15:53:16.016 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:java.io.tmpdir=/var/folders/99/2yt_482s7_qbl4fz3sdrc06s54bv98/T/
2021-04-02 15:53:16.016 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:java.compiler=<NA>
2021-04-02 15:53:16.016 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:os.name=Mac OS X
2021-04-02 15:53:16.016 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:os.arch=x86_64
2021-04-02 15:53:16.016 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:os.version=10.15.2
2021-04-02 15:53:16.016 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:user.name=chenzy
2021-04-02 15:53:16.016 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:user.home=/Users/chenzy
2021-04-02 15:53:16.016 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:user.dir=/Users/chenzy/files/gitFile/springboot-forall
2021-04-02 15:53:16.016 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:os.memory.free=149MB
2021-04-02 15:53:16.017 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:os.memory.max=1820MB
2021-04-02 15:53:16.017 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Client environment:os.memory.total=165MB
2021-04-02 15:53:16.019 INFO 25462 --- [ main] org.apache.zookeeper.ZooKeeper : Initiating client connection, connectString=localhost:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@4554de02
2021-04-02 15:53:16.022 INFO 25462 --- [ main] org.apache.zookeeper.common.X509Util : Setting -D jdk.tls.rejectClientInitiatedRenegotiation=true to disable client-initiated TLS renegotiation
2021-04-02 15:53:16.029 INFO 25462 --- [ main] org.apache.zookeeper.ClientCnxnSocket : jute.maxbuffer value is 1048575 Bytes
2021-04-02 15:53:16.033 INFO 25462 --- [ main] org.apache.zookeeper.ClientCnxn : zookeeper.request.timeout value is 0. feature enabled=false
2021-04-02 15:53:16.038 INFO 25462 --- [localhost:2181)] org.apache.zookeeper.ClientCnxn : Opening socket connection to server localhost/0:0:0:0:0:0:0:1:2181.
2021-04-02 15:53:16.038 INFO 25462 --- [localhost:2181)] org.apache.zookeeper.ClientCnxn : SASL config status: Will not attempt to authenticate using SASL (unknown error)
2021-04-02 15:53:16.042 INFO 25462 --- [ main] o.a.c.f.imps.CuratorFrameworkImpl : Default schema
2021-04-02 15:53:16.060 INFO 25462 --- [localhost:2181)] org.apache.zookeeper.ClientCnxn : Socket connection established, initiating session, client: /0:0:0:0:0:0:0:1:49886, server: localhost/0:0:0:0:0:0:0:1:2181
2021-04-02 15:53:16.063 INFO 25462 --- [ main] org.apache.curator.utils.Compatibility : Using org.apache.zookeeper.server.quorum.MultipleAddresses
2021-04-02 15:53:16.070 INFO 25462 --- [localhost:2181)] org.apache.zookeeper.ClientCnxn : Session establishment complete on server localhost/0:0:0:0:0:0:0:1:2181, session id = 0x100000cada4000b, negotiated timeout = 40000
2021-04-02 15:53:16.077 INFO 25462 --- [ain-EventThread] o.a.c.f.state.ConnectionStateManager : State change: CONNECTED
2021-04-02 15:53:16.089 INFO 25462 --- [ain-EventThread] o.a.c.framework.imps.EnsembleTracker : New config event received: {}
2021-04-02 15:53:16.096 INFO 25462 --- [ain-EventThread] o.a.c.framework.imps.EnsembleTracker : New config event received: {}
--------【TreeCacheListener--------】-------- type:NODE_ADDED
--------【TreeCacheListener--------】-------- nodePath:/zktest data:data2 type:NODE_ADDED
--------【NodeCacheListener--------】---------nodePath:/zktest data:data2
--------【TreeCacheListener--------】-------- type:NODE_ADDED
--------【TreeCacheListener--------】-------- nodePath:/zktest/innerpath2 data:data2 type:NODE_ADDED
--------【NodeCacheListener--------】---------nodePath:/zktest data:data2
--------【PathChildrenCacheListener】-------- type:CHILD_ADDED
--------【PathChildrenCacheListener】-------- nodePath:/zktest/innerpath2 data:data2 type:CHILD_ADDED
--------【TreeCacheListener--------】-------- type:NODE_ADDED
--------【TreeCacheListener--------】-------- nodePath:/zktest/innerpath3 data:data3 type:NODE_ADDED
--------【NodeCacheListener--------】---------nodePath:/zktest data:data2
--------【PathChildrenCacheListener】-------- type:CHILD_ADDED
--------【PathChildrenCacheListener】-------- nodePath:/zktest/innerpath3 data:data3 type:CHILD_ADDED
--------【TreeCacheListener--------】-------- type:NODE_ADDED
--------【TreeCacheListener--------】-------- nodePath:/zktest/innerpath data:data3 type:NODE_ADDED
--------【NodeCacheListener--------】---------nodePath:/zktest data:data2
--------【PathChildrenCacheListener】-------- type:CHILD_ADDED
--------【PathChildrenCacheListener】-------- nodePath:/zktest/innerpath data:data3 type:CHILD_ADDED
--------【TreeCacheListener--------】-------- type:NODE_ADDED
--------【TreeCacheListener--------】-------- nodePath:/zktest/innerpath4 data: type:NODE_ADDED
--------【NodeCacheListener--------】---------nodePath:/zktest data:data2
--------【PathChildrenCacheListener】-------- type:CHILD_ADDED
--------【PathChildrenCacheListener】-------- nodePath:/zktest/innerpath4 data: type:CHILD_ADDED
--------【TreeCacheListener--------】-------- type:INITIALIZED
--------【PathChildrenCacheListener】-------- type:INITIALIZED
2021-04-02 15:53:16.199 INFO 25462 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2021-04-02 15:53:16.336 INFO 25462 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 2182 (http) with context path ''
2021-04-02 15:53:16.347 INFO 25462 --- [ main] com.learning.zookeeper.ZkApplication : Started ZkApplication in 1.661 seconds (JVM running for 2.235)
Disconnected from the target VM, address: '127.0.0.1:49879', transport: 'socket'
2021-04-02 15:53:20.610 INFO 25462 --- [extShutdownHook] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor'
四、其他功能
1. 分布式锁
具体分布式锁的使用场景多样，可自行适配
public class CuratorLockTest {
private static final String ZK_ADDRESS = "127.0.0.1:2181";
private static final String ZK_PATH = "/zktest1";
public static void main(String[] args){
CuratorFramework client = CuratorFrameworkFactory.newClient(
ZK_ADDRESS,
new RetryNTimes(10, 5000)
);
client.start();
Thread thread1 = new Thread(() -> {
accquireLock(client);
});
Thread thread2 = new Thread(() -> {
accquireLock(client);
});
thread1.start();
thread2.start();
}
private static void accquireLock(CuratorFramework client){
InterProcessMutex lock = new InterProcessMutex(client, ZK_PATH);
try{
//等待60s,请求锁
if(lock.acquire(60, TimeUnit.SECONDS)){
System.out.println(Thread.currentThread().getName() + " get & hold the lock");
//占用锁5s
Thread.sleep(5000);
System.out.println(Thread.currentThread().getName() + " release the lock");
}
} catch (Exception e) {
e.printStackTrace();
}finally {
try{
lock.release();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
测试如下：
16:43:07.621 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Got ping response for session id: 0x100000cada40011 after 3ms.
16:43:07.909 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Got notification session id: 0x100000cada40011
16:43:07.910 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Got WatchedEvent state:SyncConnected type:NodeDeleted path:/zktest1/_c_ce3a9167-6e7a-45f4-8b14-36f415775da7-lock-0000000039 for session id 0x100000cada40011
16:43:07.918 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada40011, packet:: clientPath:null serverPath:null finished:false header:: 9,12 replyHeader:: 9,158,0 request:: '/zktest1,F response:: v{'_c_ffcaa88f-2741-4b0c-a85a-f694deb37a22-lock-0000000041,'_c_a99c6f23-5fa0-4cd3-a5d8-fa74ff20f4c7-lock-0000000042,'_c_c57c9182-137b-48ec-a2bf-b9a213066082-lock-0000000040,'_c_add0c35f-918d-49d2-8dae-a09a33c34988-lock-0000000043,'_c_c2baf925-0d5c-474b-b6c1-e293bb364c82-lock-0000000044},s{70,70,1617352787210,1617352787210,0,85,0,0,13,5,158}
Thread-2 get & hold the lock
Thread-2 release the lock
16:43:12.930 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Got notification session id: 0x100000cada40011
16:43:12.930 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Got WatchedEvent state:SyncConnected type:NodeDeleted path:/zktest1/_c_c57c9182-137b-48ec-a2bf-b9a213066082-lock-0000000040 for session id 0x100000cada40011
16:43:12.931 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada40011, packet:: clientPath:null serverPath:null finished:false header:: 10,2 replyHeader:: 10,159,0 request:: '/zktest1/_c_c57c9182-137b-48ec-a2bf-b9a213066082-lock-0000000040,-1 response:: null
16:43:12.934 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada40011, packet:: clientPath:null serverPath:null finished:false header:: 11,12 replyHeader:: 11,159,0 request:: '/zktest1,F response:: v{'_c_ffcaa88f-2741-4b0c-a85a-f694deb37a22-lock-0000000041,'_c_a99c6f23-5fa0-4cd3-a5d8-fa74ff20f4c7-lock-0000000042,'_c_add0c35f-918d-49d2-8dae-a09a33c34988-lock-0000000043,'_c_c2baf925-0d5c-474b-b6c1-e293bb364c82-lock-0000000044},s{70,70,1617352787210,1617352787210,0,86,0,0,13,4,159}
Thread-1 get & hold the lock
Thread-1 release the lock
16:43:17.947 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada40011, packet:: clientPath:null serverPath:null finished:false header:: 12,2 replyHeader:: 12,160,0 request:: '/zktest1/_c_ffcaa88f-2741-4b0c-a85a-f694deb37a22-lock-0000000041,-1 response:: null
2.Leader节点选举
用于多个节点为集群情况，某master节点失去心跳后，自动选举master节点
public class CuratorLeaderTest {
private static final String ZK_ADDRESS = "127.0.0.1:2181";
private static final String ZK_PATH = "/zktest1";
public static void main(String[] args) throws InterruptedException {
LeaderSelectorListener selectorListener = new LeaderSelectorListener() {
@Override
public void stateChanged(CuratorFramework curatorFramework, ConnectionState connectionState) {
}
@Override
public void takeLeadership(CuratorFramework client) throws Exception {
System.out.println(Thread.currentThread().getName() + " take leadership");
//保留5s
Thread.sleep(5000);
System.out.println(Thread.currentThread().getName() + " give up leadership");
}
};
Thread thread1 = new Thread(() -> {
registerListener(selectorListener);
});
Thread thread2 = new Thread(() -> {
registerListener(selectorListener);
});
Thread thread3 = new Thread(() -> {
registerListener(selectorListener);
});
thread1.start();
thread2.start();
thread3.start();
Thread.sleep(5*60*1000);
}
private static void registerListener(LeaderSelectorListener listener) {
//创建连接
CuratorFramework client = CuratorFrameworkFactory.newClient(
ZK_ADDRESS,
new RetryNTimes(10, 5000)
);
client.start();
//确保path存在
try{
client.create().creatingParentContainersIfNeeded().forPath(ZK_PATH);
} catch (Exception e) {
e.printStackTrace();
}
//进行选举
LeaderSelector leaderSelector = new LeaderSelector(client, ZK_PATH, listener);
leaderSelector.autoRequeue();
leaderSelector.start();
}
测试如下：
16:39:47.243 [Thread-1-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada4000e, packet:: clientPath:null serverPath:null finished:false header:: 4,15 replyHeader:: 4,73,0 request:: '/zktest1/_c_419bd043-637c-475b-b649-96c3663a5d9b-lock-,#3139322e3136382e372e313036,v{s{31,s{'world,'anyone}}},3 response:: '/zktest1/_c_419bd043-637c-475b-b649-96c3663a5d9b-lock-0000000000,s{73,73,1617352787238,1617352787238,0,0,0,72057648490741774,13,0,73}
16:39:47.244 [Thread-2-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada4000f, packet:: clientPath:null serverPath:null finished:false header:: 4,15 replyHeader:: 4,74,0 request:: '/zktest1/_c_0fb081c7-77d7-45c1-88a9-dd7c7719348c-lock-,#3139322e3136382e372e313036,v{s{31,s{'world,'anyone}}},3 response:: '/zktest1/_c_0fb081c7-77d7-45c1-88a9-dd7c7719348c-lock-0000000001,s{74,74,1617352787240,1617352787240,0,0,0,72057648490741775,13,0,74}
16:39:47.246 [Thread-0-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada40010, packet:: clientPath:null serverPath:null finished:false header:: 4,15 replyHeader:: 4,75,0 request:: '/zktest1/_c_bcaaf80d-1450-419a-b8c5-e2ad72a09481-lock-,#3139322e3136382e372e313036,v{s{31,s{'world,'anyone}}},3 response:: '/zktest1/_c_bcaaf80d-1450-419a-b8c5-e2ad72a09481-lock-0000000002,s{75,75,1617352787240,1617352787240,0,0,0,72057648490741776,13,0,75}
16:39:47.250 [Thread-0-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada40010, packet:: clientPath:null serverPath:null finished:false header:: 5,12 replyHeader:: 5,75,0 request:: '/zktest1,F response:: v{'_c_0fb081c7-77d7-45c1-88a9-dd7c7719348c-lock-0000000001,'_c_419bd043-637c-475b-b649-96c3663a5d9b-lock-0000000000,'_c_bcaaf80d-1450-419a-b8c5-e2ad72a09481-lock-0000000002},s{70,70,1617352787210,1617352787210,0,3,0,0,13,3,75}
16:39:47.250 [Thread-1-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada4000e, packet:: clientPath:null serverPath:null finished:false header:: 5,12 replyHeader:: 5,75,0 request:: '/zktest1,F response:: v{'_c_0fb081c7-77d7-45c1-88a9-dd7c7719348c-lock-0000000001,'_c_419bd043-637c-475b-b649-96c3663a5d9b-lock-0000000000,'_c_bcaaf80d-1450-419a-b8c5-e2ad72a09481-lock-0000000002},s{70,70,1617352787210,1617352787210,0,3,0,0,13,3,75}
16:39:47.251 [Thread-2-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada4000f, packet:: clientPath:null serverPath:null finished:false header:: 5,12 replyHeader:: 5,75,0 request:: '/zktest1,F response:: v{'_c_0fb081c7-77d7-45c1-88a9-dd7c7719348c-lock-0000000001,'_c_419bd043-637c-475b-b649-96c3663a5d9b-lock-0000000000,'_c_bcaaf80d-1450-419a-b8c5-e2ad72a09481-lock-0000000002},s{70,70,1617352787210,1617352787210,0,3,0,0,13,3,75}
Curator-LeaderSelector-1 take leadership
16:39:47.259 [Thread-0-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada40010, packet:: clientPath:null serverPath:null finished:false header:: 6,4 replyHeader:: 6,75,0 request:: '/zktest1/_c_0fb081c7-77d7-45c1-88a9-dd7c7719348c-lock-0000000001,T response:: #3139322e3136382e372e313036,s{74,74,1617352787240,1617352787240,0,0,0,72057648490741775,13,0,74}
16:39:47.259 [Thread-2-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada4000f, packet:: clientPath:null serverPath:null finished:false header:: 6,4 replyHeader:: 6,75,0 request:: '/zktest1/_c_419bd043-637c-475b-b649-96c3663a5d9b-lock-0000000000,T response:: #3139322e3136382e372e313036,s{73,73,1617352787238,1617352787238,0,0,0,72057648490741774,13,0,73}
Curator-LeaderSelector-1 give up leadership
16:39:52.269 [Thread-2-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Got notification session id: 0x100000cada4000f
16:39:52.270 [Thread-2-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Got WatchedEvent state:SyncConnected type:NodeDeleted path:/zktest1/_c_419bd043-637c-475b-b649-96c3663a5d9b-lock-0000000000 for session id 0x100000cada4000f
16:39:52.270 [Thread-1-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada4000e, packet:: clientPath:null serverPath:null finished:false header:: 6,2 replyHeader:: 6,76,0 request:: '/zktest1/_c_419bd043-637c-475b-b649-96c3663a5d9b-lock-0000000000,-1 response:: null
16:39:52.275 [Thread-1-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada4000e, packet:: clientPath:null serverPath:null finished:false header:: 7,15 replyHeader:: 7,77,0 request:: '/zktest1/_c_e861209a-1520-4ac6-a0c5-5c9fd46f790d-lock-,#3139322e3136382e372e313036,v{s{31,s{'world,'anyone}}},3 response:: '/zktest1/_c_e861209a-1520-4ac6-a0c5-5c9fd46f790d-lock-0000000003,s{77,77,1617352792271,1617352792271,0,0,0,72057648490741774,13,0,77}
16:39:52.277 [Thread-1-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada4000e, packet:: clientPath:null serverPath:null finished:false header:: 8,12 replyHeader:: 8,77,0 request:: '/zktest1,F response:: v{'_c_0fb081c7-77d7-45c1-88a9-dd7c7719348c-lock-0000000001,'_c_e861209a-1520-4ac6-a0c5-5c9fd46f790d-lock-0000000003,'_c_bcaaf80d-1450-419a-b8c5-e2ad72a09481-lock-0000000002},s{70,70,1617352787210,1617352787210,0,5,0,0,13,3,77}
16:39:52.282 [Thread-2-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada4000f, packet:: clientPath:null serverPath:null finished:false header:: 7,12 replyHeader:: 7,77,0 request:: '/zktest1,F response:: v{'_c_0fb081c7-77d7-45c1-88a9-dd7c7719348c-lock-0000000001,'_c_e861209a-1520-4ac6-a0c5-5c9fd46f790d-lock-0000000003,'_c_bcaaf80d-1450-419a-b8c5-e2ad72a09481-lock-0000000002},s{70,70,1617352787210,1617352787210,0,5,0,0,13,3,77}
Curator-LeaderSelector-2 take leadership
16:39:52.282 [Thread-1-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada4000e, packet:: clientPath:null serverPath:null finished:false header:: 9,4 replyHeader:: 9,77,0 request:: '/zktest1/_c_bcaaf80d-1450-419a-b8c5-e2ad72a09481-lock-0000000002,T response:: #3139322e3136382e372e313036,s{75,75,1617352787240,1617352787240,0,0,0,72057648490741776,13,0,75}
Curator-LeaderSelector-2 give up leadership
16:39:57.290 [Thread-0-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Got notification session id: 0x100000cada40010
16:39:57.290 [Thread-0-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Got WatchedEvent state:SyncConnected type:NodeDeleted path:/zktest1/_c_0fb081c7-77d7-45c1-88a9-dd7c7719348c-lock-0000000001 for session id 0x100000cada40010
16:39:57.290 [Thread-2-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada4000f, packet:: clientPath:null serverPath:null finished:false header:: 8,2 replyHeader:: 8,78,0 request:: '/zktest1/_c_0fb081c7-77d7-45c1-88a9-dd7c7719348c-lock-0000000001,-1 response:: null
16:39:57.292 [Thread-0-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Got ping response for session id: 0x100000cada40010 after 2ms.
16:39:57.295 [Thread-2-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada4000f, packet:: clientPath:null serverPath:null finished:false header:: 9,15 replyHeader:: 9,79,0 request:: '/zktest1/_c_2b6e01ea-26dc-42d8-9643-c9f23be88431-lock-,#3139322e3136382e372e313036,v{s{31,s{'world,'anyone}}},3 response:: '/zktest1/_c_2b6e01ea-26dc-42d8-9643-c9f23be88431-lock-0000000004,s{79,79,1617352797291,1617352797291,0,0,0,72057648490741775,13,0,79}
16:39:57.295 [Thread-0-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada40010, packet:: clientPath:null serverPath:null finished:false header:: 7,12 replyHeader:: 7,79,0 request:: '/zktest1,F response:: v{'_c_e861209a-1520-4ac6-a0c5-5c9fd46f790d-lock-0000000003,'_c_2b6e01ea-26dc-42d8-9643-c9f23be88431-lock-0000000004,'_c_bcaaf80d-1450-419a-b8c5-e2ad72a09481-lock-0000000002},s{70,70,1617352787210,1617352787210,0,7,0,0,13,3,79}
Curator-LeaderSelector-0 take leadership
16:39:57.297 [Thread-2-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada4000f, packet:: clientPath:null serverPath:null finished:false header:: 10,12 replyHeader:: 10,79,0 request:: '/zktest1,F response:: v{'_c_e861209a-1520-4ac6-a0c5-5c9fd46f790d-lock-0000000003,'_c_2b6e01ea-26dc-42d8-9643-c9f23be88431-lock-0000000004,'_c_bcaaf80d-1450-419a-b8c5-e2ad72a09481-lock-0000000002},s{70,70,1617352787210,1617352787210,0,7,0,0,13,3,79}
16:39:57.299 [Thread-2-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada4000f, packet:: clientPath:null serverPath:null finished:false header:: 11,4 replyHeader:: 11,79,0 request:: '/zktest1/_c_e861209a-1520-4ac6-a0c5-5c9fd46f790d-lock-0000000003,T response:: #3139322e3136382e372e313036,s{77,77,1617352792271,1617352792271,0,0,0,72057648490741774,13,0,77}
Curator-LeaderSelector-0 give up leadership
16:40:02.302 [Thread-1-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Got notification session id: 0x100000cada4000e
16:40:02.303 [Thread-1-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Got WatchedEvent state:SyncConnected type:NodeDeleted path:/zktest1/_c_bcaaf80d-1450-419a-b8c5-e2ad72a09481-lock-0000000002 for session id 0x100000cada4000e
16:40:02.303 [Thread-0-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada40010, packet:: clientPath:null serverPath:null finished:false header:: 8,2 replyHeader:: 8,80,0 request:: '/zktest1/_c_bcaaf80d-1450-419a-b8c5-e2ad72a09481-lock-0000000002,-1 response:: null
16:40:02.305 [Thread-1-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Got ping response for session id: 0x100000cada4000e after 2ms.
16:40:02.306 [Thread-0-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada40010, packet:: clientPath:null serverPath:null finished:false header:: 9,15 replyHeader:: 9,81,0 request:: '/zktest1/_c_48b0f6f3-54f5-4565-8148-63a338ae1329-lock-,#3139322e3136382e372e313036,v{s{31,s{'world,'anyone}}},3 response:: '/zktest1/_c_48b0f6f3-54f5-4565-8148-63a338ae1329-lock-0000000005,s{81,81,1617352802304,1617352802304,0,0,0,72057648490741776,13,0,81}
16:40:02.307 [Thread-1-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x100000cada4000e, packet:: clientPath:null serverPath:null finished:false header:: 10,12 replyHeader:: 10,81,0 request:: '/zktest1,F response:: v{'_c_48b0f6f3-54f5-4565-8148-63a338ae1329-lock-0000000005,'_c_e861209a-1520-4ac6-a0c5-5c9fd46f790d-lock-0000000003,'_c_2b6e01ea-26dc-42d8-9643-c9f23be88431-lock-0000000004},s{70,70,1617352787210,1617352787210,0,9,0,0,13,3,81}
Curator-LeaderSelector-1 take leadership
3. 集群连接形式
- 就是针对以上connectString:localhost:2181,修改为：localhost:2181,localhost:2182,localhost:2183 即可,能够和单节点一样进行操作
17:16:15.145 [main] INFO org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=127.0.0.1:2181,127.0.0.1:2182,127.0.0.1:2183 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@754ba872
17:16:15.150 [main] INFO org.apache.zookeeper.common.X509Util - Setting -D jdk.tls.rejectClientInitiatedRenegotiation=true to disable client-initiated TLS renegotiation
17:16:15.160 [main] INFO org.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 1048575 Bytes
17:16:15.167 [main] INFO org.apache.zookeeper.ClientCnxn - zookeeper.request.timeout value is 0. feature enabled=false
17:16:15.172 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.SaslServerPrincipal - Canonicalized address to localhost
17:16:15.174 [main-SendThread(127.0.0.1:2181)] INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server localhost/127.0.0.1:2181.
17:16:15.174 [main-SendThread(127.0.0.1:2181)] INFO org.apache.zookeeper.ClientCnxn - SASL config status: Will not attempt to authenticate using SASL (unknown error)
17:16:15.178 [main] INFO org.apache.curator.framework.imps.CuratorFrameworkImpl - Default schema
zk client start successfully!
$ create /zktest1 hello
17:16:15.195 [main-SendThread(127.0.0.1:2181)] INFO org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /127.0.0.1:56136, server: localhost/127.0.0.1:2181
17:16:15.198 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Session establishment request sent on localhost/127.0.0.1:2181
17:16:15.235 [main-SendThread(127.0.0.1:2181)] INFO org.apache.zookeeper.ClientCnxn - Session establishment complete on server localhost/127.0.0.1:2181, session id = 0x10000a2880f0000, negotiated timeout = 40000
17:16:15.238 [main-EventThread] DEBUG org.apache.curator.ConnectionState - Negotiated session timeout: 40000
17:16:15.245 [main-EventThread] INFO org.apache.curator.framework.state.ConnectionStateManager - State change: CONNECTED
17:16:15.246 [main-EventThread] DEBUG org.apache.curator.framework.imps.CuratorFrameworkImpl - Clearing sleep for 1 operations
17:16:15.268 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x10000a2880f0000, packet:: clientPath:/zookeeper/config serverPath:/zookeeper/config finished:false header:: 1,4 replyHeader:: 1,4294967297,0 request:: '/zookeeper/config,T response:: #7365727665722e313d302e302e302e303a323838383a333838383a7061727469636970616e743b302e302e302e303a32313831a7365727665722e323d7a6b323a323838383a333838383a7061727469636970616e743b302e302e302e303a32313831a7365727665722e333d7a6b333a323838383a333838383a7061727469636970616e743b302e302e302e303a32313831a76657273696f6e3d30,s{0,0,0,1617354951026,-1,0,-1,0,157,0,0}
17:16:15.272 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x10000a2880f0000, packet:: clientPath:/zookeeper/config serverPath:/zookeeper/config finished:false header:: 2,4 replyHeader:: 2,4294967297,0 request:: '/zookeeper/config,T response:: #7365727665722e313d302e302e302e303a323838383a333838383a7061727469636970616e743b302e302e302e303a32313831a7365727665722e323d7a6b323a323838383a333838383a7061727469636970616e743b302e302e302e303a32313831a7365727665722e333d7a6b333a323838383a333838383a7061727469636970616e743b302e302e302e303a32313831a76657273696f6e3d30,s{0,0,0,1617354951026,-1,0,-1,0,157,0,0}
17:16:15.274 [main-EventThread] INFO org.apache.curator.framework.imps.EnsembleTracker - New config event received: {server.1=0.0.0.0:2888:3888:participant;0.0.0.0:2181, version=0, server.3=zk3:2888:3888:participant;0.0.0.0:2181, server.2=zk2:2888:3888:participant;0.0.0.0:2181}
17:16:15.280 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x10000a2880f0000, packet:: clientPath:null serverPath:null finished:false header:: 3,15 replyHeader:: 3,4294967298,0 request:: '/zktest1,#68656c6c6f,v{s{31,s{'world,'anyone}}},0 response:: '/zktest1,s{4294967298,4294967298,1617354975260,1617354975260,0,0,0,0,5,0,4294967298}
$ ls /
17:16:15.290 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x10000a2880f0000, packet:: clientPath:null serverPath:null finished:false header:: 4,12 replyHeader:: 4,4294967298,0 request:: '/,F response:: v{'zookeeper,'zktest1},s{0,0,0,0,0,0,0,0,0,2,4294967298}
[zookeeper, zktest1]
$ get /zktest1
17:16:15.295 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x10000a2880f0000, packet:: clientPath:null serverPath:null finished:false header:: 5,4 replyHeader:: 5,4294967298,0 request:: '/zktest1,F response:: #68656c6c6f,s{4294967298,4294967298,1617354975260,1617354975260,0,0,0,0,5,0,4294967298}
hello
$ set /zktest1 world
17:16:15.310 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply session id: 0x10000a2880f0000, packet:: clientPath:null serverPath:null finished:false header:: 6,5 replyHeader:: 6,4294967299,0 request:: '/zktest1,#776f726c64,-1 response:: s{4294967298,4294967299,1617354975260,1617354975300,1,0,0,0,5,0,4294967298}
$ get /zktest1
