Kafka single-node deployment cannot access problem resolution

Scenario: A virtual machine is installed in the notebook and a Kafka service is deployed on the local virtual machine:

Write a test program, run the test program on the notebook, access the Kafka on the virtual machine, and report the following exception:

2015-01-15 09:33:26 [Kafka.producer.async.defaulteventhandler]-[info] back off for the MS before retrying send. Remaining retries = 1 2015-01-15 09:33:26 [Kafka.client.clientutils$]-[info] fetching metadata from broker Id:0,host:192.168.108.136,port : 9092 with Correlation ID 9 for 1 topic (s) Set (client-all-log-test) 2015-01-15 09:33:26 [Kafka.producer.syncproducer]-[info] Connected to 192.168.108.136:9092 for producing 2015-01-15 09:33:26 [Kafka.producer.syncproducer]-[info] disconnecting from 192.168.108.136:9092 2015-01-15 09:33:47 [Kafka.producer.syncproducer]-[error] producer connection to ubuntu-machine:9092 unsuccessful java.net.ConnectException : Connection timed Out:connect At Sun.nio.ch.Net.connect0 ( Native Method) At Sun.nio.ch.Net.connect (Unknown Source) At Sun.nio.ch.Net.connect (Unknown Source) At Sun.nio.ch.SocketChannelImpl.connect (Unknown Source) At Kafka.network.BlockingChannel.connect (blockingchannel.scala:57) At Kafka.producer.SyncProducer.connect (syncproducer.scala:141) At Kafka.producer.SyncProducer.getOrMakeConnection (syncproducer.scala:156) At kafka.producer.syncproducer.kafka$producer$syncproducer$ $doSend (syncproducer.scala:68) At kafka.producer.syncproducer$ $anonfun $send$1$ $anonfun $apply$mcv$sp$1.apply$mcv$sp (syncproducer.scala:102) At kafka.producer.syncproducer$ $anonfun $send$1$ $anonfun $apply$mcv$sp$1.apply (syncproducer.scala:102) At kafka.producer.syncproducer$ $anonfun $send$1$ $anonfun $apply$mcv$sp$1.apply (syncproducer.scala:102) At Kafka.metrics.KafkaTimer.time (kafkatimer.scala:33) At kafka.producer.syncproducer$ $anonfun $send$1.apply$mcv$sp (syncproducer.scala:101) At kafka.producer.syncproducer$ $anonfun $send$1.apply (syncproducer.scala:101) At kafka.producer.syncproducer$ $anonfun $send$1.apply (syncproducer.scala:101) At Kafka.metrics.KafkaTimer.time (kafkatimer.scala:33) At Kafka.producer.SyncProducer.send (syncproducer.scala:100) At kafka.producer.async.defaulteventhandler.kafka$producer$async$defaulteventhandler$ $send ( defaulteventhandler.scala:255) At kafka.producer.async.defaulteventhandler$ $anonfun $dispatchserializeddata$2.apply (Defaulteventhandler.scala : 106) At kafka.producer.async.defaulteventhandler$ $anonfun $dispatchserializeddata$2.apply (Defaulteventhandler.scala : 100) At scala.collection.mutable.hashmap$ $anonfun $foreach$1.apply (hashmap.scala:95) At scala.collection.mutable.hashmap$ $anonfun $foreach$1.apply (hashmap.scala:95) At Scala.collection.iterator$class.foreach (iterator.scala:772) At scala.collection.mutable.hashtable$ $anon $1.foreach (hashtable.scala:157) At Scala.collection.mutable.hashtable$class.foreachentry (hashtable.scala:190) At Scala.collection.mutable.HashMap.foreachEntry (hashmap.scala:45) At Scala.collection.mutable.HashMap.foreach (hashmap.scala:95) At Kafka.producer.async.DefaultEventHandler.dispatchSerializedData (defaulteventhandler.scala:100) At Kafka.producer.async.DefaultEventHandler.handle (defaulteventhandler.scala:72) At Kafka.producer.Producer.send (producer.scala:76) At Kafka.javaapi.producer.Producer.send (producer.scala:33) At Me.learn.kafka.demo.TestProducer.main ( testproducer.java:38) Exception in thread "main" kafka.common.FailedToSendMessageException : Failed-to-send messages after 3 tries. At Kafka.producer.async.DefaultEventHandler.handle (defaulteventhandler.scala:90) At Kafka.producer.Producer.send (producer.scala:76) At Kafka.javaapi.producer.Producer.send (producer.scala:33) At Me.learn.kafka.demo.TestProducer.main ( testproducer.java:38)

The reason should be network problems, but check the firewall settings, there is no limit, the program deployed by the virtual machine is located on the server, you can run it, the description or network restrictions.

You need to change the following two properties in Server.properties under the Config folder

zookeeper.connect=localhost:2181 #改成zookeeper. connect=10.0.30.221:2181  #去掉host. Name Comment #host.name= localhost converted to host.name=10.0.30.221

Kafka single-node deployment cannot access problem resolution