Kafka cluster Error

[Kannappan, Saravanan (Contractor)]

Hello, Someone can you help me kafka server not starting after rebooting , the 
below is the error message

[2017-10-10 22:25:25,365] INFO shutting down (kafka.server.KafkaServer)
[2017-10-10 22:25:25,374] INFO shut down completed (kafka.server.KafkaServer)
[2017-10-10 22:25:25,375] FATAL Fatal error during KafkaServerStartable 
startup. Prepare to shutdown (kafka.server.KafkaServerStartable)
org.I0Itec.zkclient.exception.ZkTimeoutException: Unable to connect to 
zookeeper server 
'172.24.235.155:2181,172.24.235.162:2181,172.24.235.180:2181,172.24.235.181:2181,172.24.235.185:2181'
 with timeout of 6000 ms
                at org.I0Itec.zkclient.ZkClient.connect(ZkClient.java:1233)
                at org.I0Itec.zkclient.ZkClient.<init>(ZkClient.java:157)
                at org.I0Itec.zkclient.ZkClient.<init>(ZkClient.java:131)
                at 
kafka.utils.ZkUtils$.createZkClientAndConnection(ZkUtils.scala:79)
                at kafka.utils.ZkUtils$.apply(ZkUtils.scala:61)
                at kafka.server.KafkaServer.initZk(KafkaServer.scala:329)
                at kafka.server.KafkaServer.startup(KafkaServer.scala:187)
                at 
kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:39)
                at kafka.Kafka$.main(Kafka.scala:67)
                at kafka.Kafka.main(Kafka.scala)

Thanks
Saravanan