zookeeper启动失败的排错
运行zookeeperd后显示启动成功：JMX enabled by defaultUsing config: /data/programfiles/zookeeper-3.4.5/bin/../conf/zoo.cfgStarting zookeeper ... STARTED但用zkServer.sh status查看，反馈如下：JMX enable
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运行zookeeperd后显示启动成功：
JMX enabled by default
Using config: /data/programfiles/zookeeper-3.4.5/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
但用zkServer.sh status查看，反馈如下：
JMX enabled by default
Using config: /data/programfiles/zookeeper-3.4.5/bin/../conf/zoo.cfg
Error contacting service. It is probably not running.
很奇怪，我用netstat -lntup查了一下端口，没发现2018端口被启用
查了zookeeper.out日志，发现如下的错误：
2014-04-16 11:59:54,425 [myid:] - ERROR [main:ZooKeeperServerMain@63] - Unexpected exception, exiting abnormally
java.net.BindException: Address already in use
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Net.java:344)
at sun.nio.ch.Net.bind(Net.java:336)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:199)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:67)
at org.apache.zookeeper.server.NIOServerCnxnFactory.configure(NIOServerCnxnFactory.java:95)
at org.apache.zookeeper.server.ZooKeeperServerMain.runFromConfig(ZooKeeperServerMain.java:110)
at org.apache.zookeeper.server.ZooKeeperServerMain.initializeAndRun(ZooKeeperServerMain.java:86)
at org.apache.zookeeper.server.ZooKeeperServerMain.main(ZooKeeperServerMain.java:52)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:116)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:78)
从错误信息来看，是端口被使用了，但我用netstat -lntup是没被使用的，再用 lsof -i:2181，发现了2181端口果然被占用了
[root@ programfiles]# lsof -i:2181
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
memcached 15843 root 56u IPv4 1650939492 0t0 TCP .:11213->.:eforward (ESTABLISHED)
php-cgi 28154 www 7u IPv4 1650939491 0t0 TCP .:eforward->.:11213 (ESTABLISHED)
JMX enabled by default
Using config: /data/programfiles/zookeeper-3.4.5/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
但用zkServer.sh status查看，反馈如下：
JMX enabled by default
Using config: /data/programfiles/zookeeper-3.4.5/bin/../conf/zoo.cfg
Error contacting service. It is probably not running.
很奇怪，我用netstat -lntup查了一下端口，没发现2018端口被启用
查了zookeeper.out日志，发现如下的错误：
2014-04-16 11:59:54,425 [myid:] - ERROR [main:ZooKeeperServerMain@63] - Unexpected exception, exiting abnormally
java.net.BindException: Address already in use
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Net.java:344)
at sun.nio.ch.Net.bind(Net.java:336)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:199)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:67)
at org.apache.zookeeper.server.NIOServerCnxnFactory.configure(NIOServerCnxnFactory.java:95)
at org.apache.zookeeper.server.ZooKeeperServerMain.runFromConfig(ZooKeeperServerMain.java:110)
at org.apache.zookeeper.server.ZooKeeperServerMain.initializeAndRun(ZooKeeperServerMain.java:86)
at org.apache.zookeeper.server.ZooKeeperServerMain.main(ZooKeeperServerMain.java:52)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:116)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:78)
从错误信息来看，是端口被使用了，但我用netstat -lntup是没被使用的，再用 lsof -i:2181，发现了2181端口果然被占用了
[root@ programfiles]# lsof -i:2181
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
memcached 15843 root 56u IPv4 1650939492 0t0 TCP .:11213->.:eforward (ESTABLISHED)
php-cgi 28154 www 7u IPv4 1650939491 0t0 TCP .:eforward->.:11213 (ESTABLISHED)
接下来就很好办了，启用另外一个端口就ok了
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