1.下载源码
地址：Apache ZooKeeper
这里我们选择3.6.3版本源码，Apache ZooKeeper 3.6.3 Source Release(asc, sha512)
2.源码导入
下载完成后，导入到eclipse中，很多类报错，缺少DO
解决方案：进入zookeeper根目录下，执行mvn install -Dmaven.test.skip=true， 生成所需代码
3.项目启动
- 启动类为QuorumPeerMain，运行报错
2021-12-28 14:37:30,168 [myid:] - ERROR [main:ZooKeeperServerMain@69] - Invalid arguments, exiting abnormally java.lang.IllegalArgumentException: Invalid number of arguments:[] at org.apache.zookeeper.server.ServerConfig.parse(ServerConfig.java:75) at org.apache.zookeeper.server.ZooKeeperServerMain.initializeAndRun(ZooKeeperServerMain.java:109) at org.apache.zookeeper.server.ZooKeeperServerMain.main(ZooKeeperServerMain.java:67) at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:140) at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:90)
出现上述错误，将conf配置文件，复制到main启动项目目录下，再加上启动参数
- 继续启动QuorumPeerMain，报错
log4j:WARN No appenders could be found for logger (org.apache.zookeeper.server.quorum.QuorumPeerConfig). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
该错误为log4j文件不再resources目录下，需要将log4j.properties移到resources目录下
- 再次启动QuorumPeerMain，正常启动，good
2021-12-28 15:12:15,164 [myid:] - INFO [main:ZookeeperBanner@42] - 2021-12-28 15:12:15,164 [myid:] - INFO [main:ZookeeperBanner@42] - ______ _ 2021-12-28 15:12:15,164 [myid:] - INFO [main:ZookeeperBanner@42] - |___ / | | 2021-12-28 15:12:15,164 [myid:] - INFO [main:ZookeeperBanner@42] - / / ___ ___ | | __ ___ ___ _ __ ___ _ __ 2021-12-28 15:12:15,164 [myid:] - INFO [main:ZookeeperBanner@42] - / / / _ / _ | |/ / / _ / _ | '_ / _ | '__| 2021-12-28 15:12:15,164 [myid:] - INFO [main:ZookeeperBanner@42] - / /__ | (_) | | (_) | | < | __/ | __/ | |_) | | __/ | | 2021-12-28 15:12:15,164 [myid:] - INFO [main:ZookeeperBanner@42] - /_____| ___/ ___/ |_|_ ___| ___| | .__/ ___| |_| 2021-12-28 15:12:15,165 [myid:] - INFO [main:ZookeeperBanner@42] - | | 2021-12-28 15:12:15,165 [myid:] - INFO [main:ZookeeperBanner@42] - |_| 2021-12-28 15:12:15,165 [myid:] - INFO [main:ZookeeperBanner@42] -
