Setting up a single Zookeeper instance and the binding fails
I am trying to set up a single zookeeper instance using the configuration below , however the start log indicates that the zookeeper is halting while trying to bind the port 2181.Can some one please let me know the issue here. Thank you.
Start up Log;
2014-07-18 16:00:48,976 [myid:] - INFO [main:QuorumPeerConfig@103] - Reading configuration from: /opt/zookeeper/bin/../conf/zoo.cfg
2014-07-18 16:00:48,980 [myid:] - ERROR [main:QuorumPeerConfig@289] - Invalid configuration, only one server specified (ignoring)
2014-07-18 16:00:48,982 [myid:] - INFO [main:DatadirCleanupManager@78] - autopurge.snapRetainCount set to 3
2014-07-18 16:00:48,982 [myid:] - INFO [main:DatadirCleanupManager@79] - autopurge.purgeInterval set to 0
2014-07-18 16:00:48,983 [myid:] - INFO [main:DatadirCleanupManager@101] - Purge task is not scheduled.
2014-07-18 16:00:48,983 [myid:] - WARN [main:QuorumPeerMain@113] - Either no config or no quorum defined in config, running in standalone mode
2014-07-18 16:00:48,997 [myid:] - INFO [main:QuorumPeerConfig@103] - Reading configuration from: /opt/zookeeper/bin/../conf/zoo.cfg
2014-07-18 16:00:48,998 [myid:] - **ERROR** [main:QuorumPeerConfig@289] - Invalid configuration, only one server specified (ignoring)
2014-07-18 16:00:48,998 [myid:] - INFO [main:ZooKeeperServerMain@95] - Starting server
2014-07-18 16:00:49,007 [myid:] - INFO [main:Environment@100] - Server environment:zookeeper.version=3.4.6-1569965, built on 02/20/2014 09:09 GMT
2014-07-18 16:00:49,007 [myid:] - INFO [main:Environment@100] - Server environment:host.name=<NA>
2014-07-18 16:00:49,007 [myid:] - INFO [main:Environment@100] - Server environment:java.version=1.7.0_51
2014-07-18 16:00:49,007 [myid:] - INFO [main:Environment@100] - Server environment:java.vendor=Oracle Corporation
2014-07-18 16:00:49,007 [myid:] - INFO [main:Environment@100] - Server environment:java.home=/usr/java/jdk1.7.0_51/jre
2014-07-18 16:00:49,007 [myid:] - INFO [main:Environment@100] - Server environment:java.class.path=/opt/zookeeper/bin/../build/classes:/opt/zookeeper/bin/../build/lib/*.jar:/opt/zookeeper/bin/../lib/slf4j-log4j12-1.6.1.jar:/opt/zookeeper/bin/../lib/slf4j-api-1.6.1.jar:/opt/zookeeper/bin/../lib/netty-3.7.0.Final.jar:/opt/zookeeper/bin/../lib/log4j-1.2.16.jar:/opt/zookeeper/bin/../lib/jline-0.9.94.jar:/opt/zookeeper/bin/../zookeeper-3.4.6.jar:/opt/zookeeper/bin/../src/java/lib/*.jar:/opt/zookeeper/bin/../conf:
2014-07-18 16:00:49,008 [myid:] - INFO [main:Environment@100] - Server environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2014-07-18 16:00:49,010 [myid:] - INFO [main:Environment@100] - Server environment:java.io.tmpdir=/tmp
2014-07-18 16:00:49,010 [myid:] - INFO [main:Environment@100] - Server environment:java.compiler=<NA>
2014-07-18 16:00:49,010 [myid:] - INFO [main:Environment@100] - Server environment:os.name=Linux
2014-07-18 16:00:49,010 [myid:] - INFO [main:Environment@100] - Server environment:os.arch=amd64
2014-07-18 16:00:49,011 [myid:] - INFO [main:Environment@100] - Server environment:os.version=3.10.0-123.4.2.el7.x86_64
2014-07-18 16:00:49,011 [myid:] - INFO [main:Environment@100] - Server environment:user.name=root
2014-07-18 16:00:49,011 [myid:] - INFO [main:Environment@100] - Server environment:user.home=/root
2014-07-18 16:00:49,011 [myid:] - INFO [main:Environment@100] - Server environment:user.dir=/opt/zookeeper/bin
2014-07-18 16:00:49,018 [myid:] - INFO [main:ZooKeeperServer@755] - tickTime set to 2000
2014-07-18 16:00:49,018 [myid:] - INFO [main:ZooKeeperServer@764] - minSessionTimeout set to -1
2014-07-18 16:00:49,018 [myid:] - INFO [main:ZooKeeperServer@773] - maxSessionTimeout set to -1
2014-07-18 16:00:49,029 [myid:] - INFO [main:NIOServerCnxnFactory@94] - binding to port 0.0.0.0/0.0.0.0:2181
Zookeeper Config File.
# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes.
dataDir=/opt/zookeeper/data
# the port at which the clients will connect
clientPort=2181
#log directory.
dataLogDir=/opt/zookeeper/log
server.1=localhost:2888:3888
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
#
# Be sure to read the maintenance section of the
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1
Answer
I suggest you to remove the following line from your configuration file
server.1=localhost:2888:3888
and then restart the server.