zookeeper服务器已启动，但无法输出 [英] zookeeper server STARTED but ruok no output

问题描述

我已经在zoo.cfg中进行了设置: clientPort = 2181

I have set in zoo.cfg : clientPort=2181

cloudera @ cloudera-vm:/$ sudo/usr/lib/zookeeper/bin/zkServer.sh开始

cloudera@cloudera-vm:/$ sudo /usr/lib/zookeeper/bin/zkServer.sh start

我收到以下答复:

JMX enabled by default
Using config: /usr/lib/zookeeper/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED

cloudera @ cloudera-vm:/$ sudo/usr/lib/zookeeper/bin/zkServer.sh状态

cloudera@cloudera-vm:/$ sudo /usr/lib/zookeeper/bin/zkServer.sh status

JMX enabled by default
Using config: /usr/lib/zookeeper/bin/../conf/zoo.cfg
Mode: standalone

但是

$ echo ruok | nc localhost 2181
$

未提供任何输出.问题出在哪里?

is not giving any output. where is the problem?

日志文件:

2014-10-03 08:40:10,912 - INFO  [main:QuorumPeerConfig@90] - Reading configuration from: /usr/lib/zookeeper/bin/../conf/zoo.cfg
2014-10-03 08:40:10,916 - ERROR [main:QuorumPeerConfig@259] - Invalid configuration, only one server specified (ignoring)
2014-10-03 08:40:10,916 - WARN  [main:QuorumPeerMain@105] - Either no config or no quorum defined in config, running  in standalone mode
2014-10-03 08:40:10,927 - INFO  [main:QuorumPeerConfig@90] - Reading configuration from: /usr/lib/zookeeper/bin/../conf/zoo.cfg
2014-10-03 08:40:10,928 - ERROR [main:QuorumPeerConfig@259] - Invalid configuration, only one server specified (ignoring)
2014-10-03 08:40:10,928 - INFO  [main:ZooKeeperServerMain@94] - Starting server
2014-10-03 08:40:10,933 - INFO  [main:Environment@97] - Server environment:zookeeper.version=3.3.5-cdh3u6--1, built on 03/20/2013 20:16 GMT
2014-10-03 08:40:10,933 - INFO  [main:Environment@97] - Server environment:host.name=cloudera-vm
2014-10-03 08:40:10,933 - INFO  [main:Environment@97] - Server environment:java.version=1.6.0_24
2014-10-03 08:40:10,934 - INFO  [main:Environment@97] - Server environment:java.vendor=Sun Microsystems Inc.
2014-10-03 08:40:10,934 - INFO  [main:Environment@97] - Server environment:java.home=/usr/lib/jvm/java-6-sun-1.6.0.24/jre
2014-10-03 08:40:10,934 - INFO  [main:Environment@97] - Server environment:java.class.path=/usr/lib/zookeeper/bin/../build/classes:/usr/lib/zookeeper/bin/../build/lib/*.jar:/usr/lib/zookeeper/bin/../zookeeper-3.3.5-cdh3u6.jar:/usr/lib/zookeeper/bin/../lib/log4j-1.2.15.jar:/usr/lib/zookeeper/bin/../lib/jline-0.9.94.jar:/usr/lib/zookeeper/bin/../src/java/lib/*.jar:/usr/lib/zookeeper/bin/../conf:
2014-10-03 08:40:10,934 - INFO  [main:Environment@97] - Server environment:java.library.path=/usr/lib/jvm/java-6-sun-1.6.0.24/jre/lib/i386/client:/usr/lib/jvm/java-6-sun-1.6.0.24/jre/lib/i386:/usr/lib/jvm/java-6-sun-1.6.0.24/jre/../lib/i386:/usr/java/packages/lib/i386:/lib:/usr/lib
2014-10-03 08:40:10,934 - INFO  [main:Environment@97] - Server environment:java.io.tmpdir=/tmp
2014-10-03 08:40:10,934 - INFO  [main:Environment@97] - Server environment:java.compiler=<NA>
2014-10-03 08:40:10,934 - INFO  [main:Environment@97] - Server environment:os.name=Linux
2014-10-03 08:40:10,934 - INFO  [main:Environment@97] - Server environment:os.arch=i386
2014-10-03 08:40:10,935 - INFO  [main:Environment@97] - Server environment:os.version=2.6.35-28-generic
2014-10-03 08:40:10,935 - INFO  [main:Environment@97] - Server environment:user.name=root
2014-10-03 08:40:10,935 - INFO  [main:Environment@97] - Server environment:user.home=/root
2014-10-03 08:40:10,935 - INFO  [main:Environment@97] - Server environment:user.dir=/
2014-10-03 08:40:10,940 - INFO  [main:ZooKeeperServer@673] - tickTime set to 2000
2014-10-03 08:40:10,940 - INFO  [main:ZooKeeperServer@682] - minSessionTimeout set to -1
2014-10-03 08:40:10,941 - INFO  [main:ZooKeeperServer@691] - maxSessionTimeout set to -1
2014-10-03 08:40:10,953 - INFO  [main:NIOServerCnxn$Factory@143] - binding to port 0.0.0.0/0.0.0.0:2181
2014-10-03 08:40:10,963 - INFO  [main:FileSnap@82] - Reading snapshot /var/zookeeper/version-2/snapshot.0
2014-10-03 08:40:10,972 - INFO  [main:FileTxnSnapLog@256] - Snapshotting: 0
2014-10-03 08:45:42,225 - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn$Factory@251] - Accepted socket connection from /127.0.0.1:39879
2014-10-03 08:45:42,231 - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1237] - Processing srvr command from /127.0.0.1:39879
2014-10-03 08:45:42,239 - INFO  [Thread-1:NIOServerCnxn@1435] - Closed socket connection for client /127.0.0.1:39879 (no session established for client)

推荐答案

要记住的一件事是 echo hello |回声.nc localhost 2181 只是向host:port写问候，而不必等待接收任何响应.如果必须等待响应，请为netcat提供 -q 选项，以使其等待.例如，您可能想尝试 echo hello |.nc -q 3 localhost 2181

One thing to keep in mind is that echo hello | nc localhost 2181 just writes hello to the host:port and doesn't necessarily wait to receive any response. If you must wait for a response, make netcat wait for it by providing it a -q option. For instance, you might want to try echo hello | nc -q 3 localhost 2181

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