kafka清空topics

来源：互联网发布：大数据时代读后感文章编辑：程序博客网时间：2024/05/10 01:05

1、缘由（需求）：因为测试时不小心，写了一大堆topics，看监测时一顿揪心。

2、解决方案：kafka是被zookeeper监管的，topics是在zookeeper上的（描述可能不是很准确），我发现kakfa原生api好像没有批量删除topics的方式，我登陆到zookeeper后，在zookeeper的目录下发现了topics。于是写了个递归程序将其删除。以下是代码：

public class App {static String path = "/brokers";static ZKConnection zkc = null;public static void main(String[] args) throws Exception {zkc = new ZKConnection();zkc.connect();get(zkc.zk.getChildren(path, true), path);}public static void get(List<String> paths, String path) throws Exception {for (String p : paths) {p = path + "/" + p;if (null == zkc.zk.exists(p, true)) {System.out.println(p);//zkc.zk.delete(p, 0);} else {get(zkc.zk.getChildren(p, true), p);int i =zkc.zk.exists(p,true).getVersion();zkc.zk.delete(p,i);}System.out.println(p);}}}class ZKConnection {/** * server列表, 以逗号分割 */protected String hosts = "server1:2181,server2:2181,server3:2181";/** * 连接的超时时间, 毫秒 */private static final int SESSION_TIMEOUT = 5000;private CountDownLatch connectedSignal = new CountDownLatch(1);public ZooKeeper zk;/** * 连接zookeeper server */public void connect() throws Exception {zk = new ZooKeeper(hosts, SESSION_TIMEOUT, new ConnWatcher());// 等待连接完成connectedSignal.await();}public class ConnWatcher implements Watcher {public void process(WatchedEvent event) {// 连接建立, 回调process接口时, 其event.getState()为KeeperState.SyncConnectedif (event.getState() == KeeperState.SyncConnected) {// 放开闸门, wait在connect方法上的线程将被唤醒connectedSignal.countDown();}}}

注：连接代码是网上得的

3.重启kafka，完毕。

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