1、启动kafka的脚本程序报如下所示的错误：

 [hadoop@slaver1 script_hadoop]$ kafka-start.sh

 start kafkaServer...

 [-- ::,] INFO Verifying properties (kafka.utils.VerifiableProperties)

 [-- ::,] INFO Property broker.id is overridden to  (kafka.utils.VerifiableProperties)

 [-- ::,] INFO Property log.cleaner.enable is overridden to false (kafka.utils.VerifiableProperties)

 [-- ::,] INFO Property log.dirs is overridden to /tmp/kafka-logs (kafka.utils.VerifiableProperties)

 [-- ::,] INFO Property log.retention.check.interval.ms is overridden to  (kafka.utils.VerifiableProperties)

 [-- ::,] INFO Property log.retention.hours is overridden to  (kafka.utils.VerifiableProperties)

 [-- ::,] INFO Property log.segment.bytes is overridden to  (kafka.utils.VerifiableProperties)

 [-- ::,] INFO Property num.io.threads is overridden to  (kafka.utils.VerifiableProperties)

 [-- ::,] INFO Property num.network.threads is overridden to  (kafka.utils.VerifiableProperties)

 [-- ::,] INFO Property num.partitions is overridden to  (kafka.utils.VerifiableProperties)

 [-- ::,] INFO Property port is overridden to  (kafka.utils.VerifiableProperties)

 [-- ::,] INFO Property socket.receive.buffer.bytes is overridden to  (kafka.utils.VerifiableProperties)

 [-- ::,] INFO Property socket.request.max.bytes is overridden to  (kafka.utils.VerifiableProperties)

 [-- ::,] INFO Property socket.send.buffer.bytes is overridden to  (kafka.utils.VerifiableProperties)

 [-- ::,] INFO Property zookeeper.connect is overridden to slaver1:,slaver2:,slaver3: (kafka.utils.VerifiableProperties)

 [-- ::,] INFO Property zookeeper.connection.timeout.ms is overridden to  (kafka.utils.VerifiableProperties)

 [-- ::,] INFO [Kafka Server ], starting (kafka.server.KafkaServer)

 [-- ::,] INFO [Kafka Server ], Connecting to zookeeper on slaver1:,slaver2:,slaver3: (kafka.server.KafkaServer)

 [-- ::,] INFO Starting ZkClient event thread. (org.I0Itec.zkclient.ZkEventThread)

 [-- ::,] INFO Client environment:zookeeper.version=3.3.-, built on // : GMT (org.apache.zookeeper.ZooKeeper)

 [-- ::,] INFO Client environment:host.name=slaver1 (org.apache.zookeeper.ZooKeeper)

 [-- ::,] INFO Client environment:java.version=1.7.0_79 (org.apache.zookeeper.ZooKeeper)

 [-- ::,] INFO Client environment:java.vendor=Oracle Corporation (org.apache.zookeeper.ZooKeeper)

 [-- ::,] INFO Client environment:java.home=/home/hadoop/soft/jdk1..0_79/jre (org.apache.zookeeper.ZooKeeper)

 [-- ::,] INFO Client environment:java.class.path=:/home/hadoop/soft/kafka_2.9.2-0.8./bin/../core/build/dependant-libs-2.8./*.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../perf/build/libs//kafka-perf_2.8.0*.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../clients/build/libs//kafka-clients*.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../examples/build/libs//kafka-examples*.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../contrib/hadoop-consumer/build/libs//kafka-hadoop-consumer*.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../contrib/hadoop-producer/build/libs//kafka-hadoop-producer*.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../libs/jopt-simple-3.2.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../libs/kafka_2.9.2-0.8.1.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../libs/log4j-1.2.15.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../libs/metrics-annotation-2.2.0.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../libs/metrics-core-2.2.0.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../libs/scala-library-2.9.2.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../libs/slf4j-api-1.7.2.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../libs/slf4j-nop-1.7.6.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../libs/snappy-java-1.0.5.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../libs/zkclient-0.3.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../libs/zookeeper-3.3.4.jar:/home/hadoop/soft/kafka_2.9.2-0.8.1/bin/../core/build/libs/kafka_2.8.0*.jar (org.apache.zookeeper.ZooKeeper)

 [2018-05-22 09:29:09,227] INFO Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib (org.apache.zookeeper.ZooKeeper)

 [2018-05-22 09:29:09,227] INFO Client environment:java.io.tmpdir=/tmp (org.apache.zookeeper.ZooKeeper)

 [2018-05-22 09:29:09,227] INFO Client environment:java.compiler=<NA> (org.apache.zookeeper.ZooKeeper)

 [2018-05-22 09:29:09,227] INFO Client environment:os.name=Linux (org.apache.zookeeper.ZooKeeper)

 [2018-05-22 09:29:09,227] INFO Client environment:os.arch=amd64 (org.apache.zookeeper.ZooKeeper)

 [2018-05-22 09:29:09,228] INFO Client environment:os.version=2.6.32-358.el6.x86_64 (org.apache.zookeeper.ZooKeeper)

 [2018-05-22 09:29:09,228] INFO Client environment:user.name=hadoop (org.apache.zookeeper.ZooKeeper)

 [2018-05-22 09:29:09,228] INFO Client environment:user.home=/home/hadoop (org.apache.zookeeper.ZooKeeper)

 [2018-05-22 09:29:09,228] INFO Client environment:user.dir=/home/hadoop (org.apache.zookeeper.ZooKeeper)

 [2018-05-22 09:29:09,230] INFO Initiating client connection, connectString=slaver1:2181,slaver2:2181,slaver3:2181 sessionTimeout=6000 watcher=org.I0Itec.zkclient.ZkClient@458dd138 (org.apache.zookeeper.ZooKeeper)

 [2018-05-22 09:29:09,377] INFO Opening socket connection to server slaver1/192.168.19.131:2181 (org.apache.zookeeper.ClientCnxn)

 [2018-05-22 09:29:09,443] WARN Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)

 java.net.ConnectException: Connection refused

     at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)

     at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)

     at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1146)

 [2018-05-22 09:29:10,410] INFO Opening socket connection to server slaver2/192.168.19.132:2181 (org.apache.zookeeper.ClientCnxn)

 [2018-05-22 09:29:10,415] WARN Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)

 java.net.ConnectException: Connection refused

     at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)

     at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)

     at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1146)

 [2018-05-22 09:29:11,111] INFO Opening socket connection to server slaver3/192.168.19.133:2181 (org.apache.zookeeper.ClientCnxn)

 [2018-05-22 09:29:11,112] WARN Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)

 java.net.ConnectException: Connection refused

     at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)

     at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)

     at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1146)

 [2018-05-22 09:29:13,211] INFO Opening socket connection to server slaver1/192.168.19.131:2181 (org.apache.zookeeper.ClientCnxn)

 [2018-05-22 09:29:13,212] WARN Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)

 java.net.ConnectException: Connection refused

     at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)

     at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)

     at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1146)

 [2018-05-22 09:29:14,198] INFO Opening socket connection to server slaver2/192.168.19.132:2181 (org.apache.zookeeper.ClientCnxn)

 [2018-05-22 09:29:14,199] WARN Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)

 java.net.ConnectException: Connection refused

     at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)

     at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)

     at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1146)

 [2018-05-22 09:29:14,981] INFO Opening socket connection to server slaver3/192.168.19.133:2181 (org.apache.zookeeper.ClientCnxn)

 [2018-05-22 09:29:14,982] WARN Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)

 java.net.ConnectException: Connection refused

     at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)

     at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)

     at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1146)

 [2018-05-22 09:29:16,581] INFO Opening socket connection to server slaver1/192.168.19.131:2181 (org.apache.zookeeper.ClientCnxn)

 [2018-05-22 09:29:16,582] WARN Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)

 java.net.ConnectException: Connection refused

     at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)

     at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)

     at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1146)

 [2018-05-22 09:29:16,891] INFO Opening socket connection to server slaver2/192.168.19.132:2181 (org.apache.zookeeper.ClientCnxn)

 [2018-05-22 09:29:16,893] WARN Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)

 java.net.ConnectException: Connection refused

     at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)

     at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)

     at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1146)

 [2018-05-22 09:29:17,756] INFO Opening socket connection to server slaver3/192.168.19.133:2181 (org.apache.zookeeper.ClientCnxn)

 [2018-05-22 09:29:17,757] WARN Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)

 java.net.ConnectException: Connection refused

     at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)

     at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)

     at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1146)

 ^CKilled by signal 2.

 ^CKilled by signal 2.

 ^CKilled by signal 2.

 [hadoop@slaver1 script_hadoop]$ ^C

 [hadoop@slaver1 script_hadoop]$

2、根据错误分析，说zookeeper的问题，之前我没有启动zookeeper集群，所以先启动zookeeper集群，然后启动kafka解决问题；

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