Zookeeper 集群4字命令白名单 stat is not executed because it is not in the whitelist.

今天搭建Hbase集群过程中，在页面http://hadoop01:16010/zk.jsp发现zk 通讯统计节（Quorum Server Statistics）存在提示stat is not executed because it is not in the whitelist.

解决思路：

[root@hadoop01 bigdata]# echo conf|nc hadoop01 2181
conf is not executed because it is not in the whitelist.

zk的这些指令未在白名单里。这些指令有

    // specify all of the commands that are availablestatic {cmd2String.put(confCmd, "conf");cmd2String.put(consCmd, "cons");cmd2String.put(crstCmd, "crst");cmd2String.put(dirsCmd, "dirs");cmd2String.put(dumpCmd, "dump");cmd2String.put(enviCmd, "envi");cmd2String.put(getTraceMaskCmd, "gtmk");cmd2String.put(ruokCmd, "ruok");cmd2String.put(setTraceMaskCmd, "stmk");cmd2String.put(srstCmd, "srst");cmd2String.put(srvrCmd, "srvr");cmd2String.put(statCmd, "stat");cmd2String.put(wchcCmd, "wchc");cmd2String.put(wchpCmd, "wchp");cmd2String.put(wchsCmd, "wchs");cmd2String.put(mntrCmd, "mntr");cmd2String.put(isroCmd, "isro");cmd2String.put(telnetCloseCmd, "telnet close");}

搜索源码is not executed because it is not in the whitelist.

/** Return if four letter word found and responded to, otw false **/private boolean checkFourLetterWord(final Channel channel,ChannelBuffer message, final int len) throws IOException{// We take advantage of the limited size of the length to look// for cmds. They are all 4-bytes which fits inside of an intif (!FourLetterCommands.isKnown(len)) {return false;}String cmd = FourLetterCommands.getCommandString(len);channel.setInterestOps(0).awaitUninterruptibly();packetReceived();final PrintWriter pwriter = new PrintWriter(new BufferedWriter(new SendBufferWriter()));// ZOOKEEPER-2693: don't execute 4lw if it's not enabled.// 注意此处命令是否允许执行，isEnabled方法用于判断if (!FourLetterCommands.isEnabled(cmd)) {LOG.debug("Command {} is not executed because it is not in the whitelist.", cmd);NopCommand nopCmd = new NopCommand(pwriter, this, cmd +" is not executed because it is not in the whitelist.");nopCmd.start();return true;}LOG.info("Processing " + cmd + " command from "+ channel.getRemoteAddress());if (len == FourLetterCommands.setTraceMaskCmd) {ByteBuffer mask = ByteBuffer.allocate(8);message.readBytes(mask);mask.flip();long traceMask = mask.getLong();ZooTrace.setTextTraceLevel(traceMask);SetTraceMaskCommand setMask = new SetTraceMaskCommand(pwriter, this, traceMask);setMask.start();return true;} else {CommandExecutor commandExecutor = new CommandExecutor();return commandExecutor.execute(this, pwriter, len, zkServer,factory);}}

 /*** Check if the specified command is enabled.** In ZOOKEEPER-2693 we introduce a configuration option to only* allow a specific set of white listed commands to execute.* A command will only be executed if it is also configured* in the white list.** @param command The command string.* @return true if the specified command is enabled*/public synchronized static boolean isEnabled(String command) {// whiteListInitialized是否初始化过的标记，默认是false，whiteListedCommands相关命令加载完成后，就为true了if (whiteListInitialized) {return whiteListedCommands.contains(command);}// 参数key名称zookeeper.4lw.commands.whitelist的值直接用*，则会把cmd2String里已经缓存的所有指令放到这个白名单里String commands = System.getProperty(ZOOKEEPER_4LW_COMMANDS_WHITELIST);if (commands != null) {String[] list = commands.split(",");for (String cmd : list) {if (cmd.trim().equals("*")) {for (Map.Entry<Integer, String> entry : cmd2String.entrySet()) {whiteListedCommands.add(entry.getValue());}break;}if (!cmd.trim().isEmpty()) {whiteListedCommands.add(cmd.trim());}}}// It is sad that isro and srvr are used by ZooKeeper itself. Need fix this// before deprecating 4lw.if (System.getProperty("readonlymode.enabled", "false").equals("true")) {whiteListedCommands.add("isro");}// zkServer.sh depends on "srvr".whiteListedCommands.add("srvr");whiteListInitialized = true;LOG.info("The list of known four letter word commands is : {}", Arrays.asList(cmd2String));LOG.info("The list of enabled four letter word commands is : {}", Arrays.asList(whiteListedCommands));return whiteListedCommands.contains(command);}

解决方法：

方法1和2均可解决，采用其一即可。

1、在zoo.cfg 文件里加入配置项让这些指令放行

#开启四字命令
4lw.commands.whitelist=*

2、在zk的启动脚本zkServer.sh中新增放行指令

    ZOOMAIN="-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=$JMXPORT -Dcom.sun.management.jmxremote.authenticate=$JMXAUTH -Dcom.sun.management.jmxremote.ssl=$JMXSSL -Dzookeeper.jmx.log4j.disable=$JMXLOG4J org.apache.zookeeper.server.quorum.QuorumPeerMain"fi
elseecho "JMX disabled by user request" >&2ZOOMAIN="org.apache.zookeeper.server.quorum.QuorumPeerMain"
fi#添加ＶＭ环境变量-Dzookeeper.4lw.commands.whitelist=*
ZOOMAIN="-Dzookeeper.4lw.commands.whitelist=* ${ZOOMAIN}"if [ "x$SERVER_JVMFLAGS" != "x" ]
thenJVMFLAGS="$SERVER_JVMFLAGS $JVMFLAGS"
fi

注：配置完毕后，记得重启集群。./zkServer.sh restart

Zookeeper 集群4字命令白名单 stat is not executed because it is not in the whitelist.相关推荐

Zookeeper集群搭建(涵盖命令详解)与Error contacting service. It is probably not running的问题解决
搭建部分参考文章:http://www.cnblogs.com/luotianshuai/p/5206662.html 这篇博客分为四个部分: >>>zookeeper简介 > ...
Zookeeper命令操作（初始Zookeeper、JavaAPI操作、分布式锁实现、模拟12306售票分布式锁、Zookeeper集群搭建、选举投票）
Zookeeper命令操作(初始Zookeeper.JavaAPI操作.分布式锁实现.模拟12306售票分布式锁.Zookeeper集群搭建.选举投票) 1.初始Zookeeper Zookeeper ...
Zookeeper集群部署和使用
Zookeeper 由 Apache Hadoop 的 Zookeeper 子项目发展而来,Google Chubby的一个开源实现.它是一个分布式应用程序协调服务,提供的功能包括:配置管理,名字服务 ...
Zookeeper集群部署及报错分析
安装下载压缩包解压修改zoo.cfg文件创建myid文件启动自启动配置有时间再补hhh 报错处理很荣幸的遇到了大部分报错,日志再zookeeper目录的bin下的zookeeper.o ...
zookeeper集群节点热扩容和迁移详解
推荐阅读 Helm3(K8S 资源对象管理工具)视频教程:https://edu.csdn.net/course/detail/32506 Helm3(K8S 资源对象管理工具)博客专栏:https: ...
三台机器安装zookeeper集群
1.准备工作 (1).关闭防火墙 systemctl stop firewalld systemctl disable firewalld (2).三台机器关闭selinux 三台机器在root用户下 ...
zookeeper集群搭建与使用
1.概念 1.1集群中的角色 leader服务器:zookeeper集群的核心 follower服务器:zookeeper集群状态的跟随者 observer服务器:观察者1.2会话会话是指客户端与z ...
分布式协调服务Zookeeper集群搭建
分布式协调服务Zookeeper集群搭建作者:尹正杰版权声明:原创作品,谢绝转载!否则将追究法律责任. 一.安装jdk环境 1>.操作环境 [root@node101.yinzhengjie ...
077. Zookeeper 集群相关信息
1. ZooKeeper 集群可靠的 ZooKeeper 服务. 只要集群的大多数都准备好了,就可以使用这项服务. 容错集群设置至少需要三个服务器,强烈建议使用奇数个服务器. 建议每个服务运行在单独 ...

Zookeeper 集群4字命令白名单 stat is not executed because it is not in the whitelist.

Zookeeper 集群4字命令白名单 stat is not executed because it is not in the whitelist.相关推荐

最新文章

热门文章