OK. thanks!
Jason On Mon, Jan 7, 2013 at 3:55 PM, Neha Narkhede <neha.narkh...@gmail.com> wrote: > Jason, > > In 0.8, we changed the zookeeper data structures as well. You might want to > either use a new zk namespace or delete all of your zk data and restart 0.8. > > Thanks, > Neha > > > On Mon, Jan 7, 2013 at 12:28 PM, Jason Huang <jason.hu...@icare.com> wrote: > >> Never mind - I was able to start the server after removing the >> previous installed 0.7.2 instance of Kafka. >> >> Jason >> >> On Mon, Jan 7, 2013 at 2:56 PM, Jason Huang <jason.hu...@icare.com> wrote: >> > Hello, >> > >> > I am trying out Kafka 0.8 using only one broker and I am unable to >> > start the server. >> > >> > With the instruction from this link - >> > https://cwiki.apache.org/confluence/display/KAFKA/Kafka+0.8+Quick+Start, >> > I was able to download and install 0.8. Since I only have one >> > machine, I did the following configuration change: >> > >> > (1) Comment out the JMX_PORT setting in the script >> bin/kafka-server-start.sh >> > (2) Keep config/server.properties as: >> > brokerid=0 >> > port=9092 >> > log.dir=/tmp/kafka-logs >> > >> > Then I was able to start zookeeper as: bin/zookeeper-server-start.sh >> > config/zookeeper.properties >> > >> > However, when I started broker as: bin/kafka-server-start.sh >> > config/server.properties, I got the following error (sorry for the >> > long paste): >> > >> > 2013-01-07 14:47:24,251] INFO [Kafka Server 0], starting >> > (kafka.server.KafkaServer) >> > [2013-01-07 14:47:24,276] INFO [Log Manager on Broker 0] Starting log >> > cleaner every 60000 ms (kafka.log.LogManager) >> > [2013-01-07 14:47:24,283] INFO [Log Manager on Broker 0] Starting log >> > flusher every 1000 ms with the following overrides Map() >> > (kafka.log.LogManager) >> > [2013-01-07 14:47:24,306] INFO Awaiting socket connections on >> > 0.0.0.0:9092. (kafka.network.Acceptor) >> > [2013-01-07 14:47:24,307] INFO [Socket Server on Broker 0], started >> > (kafka.network.SocketServer) >> > [2013-01-07 14:47:24,313] INFO connecting to ZK: localhost:2181 >> > (kafka.server.KafkaZooKeeper) >> > [2013-01-07 14:47:24,321] INFO Starting ZkClient event thread. >> > (org.I0Itec.zkclient.ZkEventThread) >> > [2013-01-07 14:47:24,327] INFO Client >> > environment:zookeeper.version=3.3.3-1203054, built on 11/17/2011 05:47 >> > GMT (org.apache.zookeeper.ZooKeeper) >> > [2013-01-07 14:47:24,327] INFO Client >> > environment:host.name=kafka.icare.com (org.apache.zookeeper.ZooKeeper) >> > [2013-01-07 14:47:24,327] INFO Client >> > environment:java.version=1.6.0_24 (org.apache.zookeeper.ZooKeeper) >> > [2013-01-07 14:47:24,327] INFO Client environment:java.vendor=Sun >> > Microsystems Inc. (org.apache.zookeeper.ZooKeeper) >> > [2013-01-07 14:47:24,327] INFO Client >> > environment:java.home=/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre >> > (org.apache.zookeeper.ZooKeeper) >> > [2013-01-07 14:47:24,327] INFO Client >> > >> environment:java.class.path=:./bin/../project/boot/scala-2.8.0/lib/scala-compiler.jar:./bin/../project/boot/scala-2.8.0/lib/scala-library.jar:./bin/../core/target/scala_2.8.0/kafka-0.8.0.jar:./bin/../core/target/scala_2.8.0/kafka-0.8.0-test.jar:./bin/../core/lib/metrics-annotation-3.0.0-c0c8be71.jar:./bin/../core/lib/metrics-core-3.0.0-c0c8be71.jar:./bin/../core/lib/zkclient-20120522.jar:./bin/../perf/target/scala_2.8.0/kafka-perf-0.8.0.jar:./bin/../core/lib_managed/scala_2.8.0/compile/jopt-simple-3.2.jar:./bin/../core/lib_managed/scala_2.8.0/compile/log4j-1.2.15.jar:./bin/../core/lib_managed/scala_2.8.0/compile/slf4j-api-1.7.2.jar:./bin/../core/lib_managed/scala_2.8.0/compile/slf4j-simple-1.7.2.jar:./bin/../core/lib_managed/scala_2.8.0/compile/snappy-java-1.0.4.1.jar:./bin/../core/lib_managed/scala_2.8.0/compile/zookeeper-3.3.4.jar >> > (org.apache.zookeeper.ZooKeeper) >> > [2013-01-07 14:47:24,327] INFO Client >> > >> environment:java.library.path=/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre/lib/amd64/server:/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre/lib/amd64:/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib >> > (org.apache.zookeeper.ZooKeeper) >> > [2013-01-07 14:47:24,327] INFO Client environment:java.io.tmpdir=/tmp >> > (org.apache.zookeeper.ZooKeeper) >> > [2013-01-07 14:47:24,327] INFO Client environment:java.compiler=<NA> >> > (org.apache.zookeeper.ZooKeeper) >> > [2013-01-07 14:47:24,327] INFO Client environment:os.name=Linux >> > (org.apache.zookeeper.ZooKeeper) >> > [2013-01-07 14:47:24,327] INFO Client environment:os.arch=amd64 >> > (org.apache.zookeeper.ZooKeeper) >> > [2013-01-07 14:47:24,327] INFO Client >> > environment:os.version=2.6.32-279.14.1.el6.x86_64 >> > (org.apache.zookeeper.ZooKeeper) >> > [2013-01-07 14:47:24,327] INFO Client environment:user.name=root >> > (org.apache.zookeeper.ZooKeeper) >> > [2013-01-07 14:47:24,327] INFO Client environment:user.home=/root >> > (org.apache.zookeeper.ZooKeeper) >> > [2013-01-07 14:47:24,328] INFO Client >> > environment:user.dir=/opt/kafka-0.8.0 (org.apache.zookeeper.ZooKeeper) >> > [2013-01-07 14:47:24,328] INFO Initiating client connection, >> > connectString=localhost:2181 sessionTimeout=6000 >> > watcher=org.I0Itec.zkclient.ZkClient@bdee400 >> > (org.apache.zookeeper.ZooKeeper) >> > [2013-01-07 14:47:24,338] INFO Opening socket connection to server >> > localhost/127.0.0.1:2181 (org.apache.zookeeper.ClientCnxn) >> > [2013-01-07 14:47:24,341] INFO Socket connection established to >> > localhost/127.0.0.1:2181, initiating session >> > (org.apache.zookeeper.ClientCnxn) >> > [2013-01-07 14:47:24,410] INFO Session establishment complete on >> > server localhost/127.0.0.1:2181, sessionid = 0x13c168d69920000, >> > negotiated timeout = 6000 (org.apache.zookeeper.ClientCnxn) >> > [2013-01-07 14:47:24,412] INFO zookeeper state changed (SyncConnected) >> > (org.I0Itec.zkclient.ZkClient) >> > [2013-01-07 14:47:24,430] INFO Registered broker 0 at path >> > /brokers/ids/0 with address kafka.icare.com:9092. >> > (kafka.utils.ZkUtils$) >> > [2013-01-07 14:47:24,431] INFO [Kafka Server 0], Connecting to ZK: >> > localhost:2181 (kafka.server.KafkaServer) >> > [2013-01-07 14:47:24,473] INFO [ControllerEpochListener on 0]: >> > Initialized controller epoch to 1579 and zk version 1578 >> > (kafka.controller.ControllerEpochListener) >> > [2013-01-07 14:47:24,516] INFO Will not load MX4J, mx4j-tools.jar is >> > not in the classpath (kafka.utils.Mx4jLoader$) >> > [2013-01-07 14:47:24,517] INFO [Controller 0]: Controller starting up >> > (kafka.controller.KafkaController) >> > [2013-01-07 14:47:24,524] INFO 0 successfully elected as leader >> > (kafka.server.ZookeeperLeaderElector) >> > [2013-01-07 14:47:24,525] INFO [Controller 0]: Broker 0 starting >> > become controller state transition (kafka.controller.KafkaController) >> > [2013-01-07 14:47:24,530] INFO Conditional update of zkPath >> > /controllerEpoch with value 1580 and expected version 1578 succeeded, >> > returning the new version: 1579 (kafka.utils.ZkUtils$) >> > [2013-01-07 14:47:24,531] INFO [Controller 0]: Controller 0 >> > incremented epoch to 1580 (kafka.controller.KafkaController) >> > [2013-01-07 14:47:24,597] ERROR Error while electing or becoming >> > leader on broker 0 (kafka.server.ZookeeperLeaderElector) >> > kafka.common.KafkaException: Can't parse json string: null >> > at kafka.utils.Json$.liftedTree1$1(Json.scala:20) >> > at kafka.utils.Json$.parseFull(Json.scala:16) >> > at >> kafka.utils.ZkUtils$$anonfun$getReplicaAssignmentForTopics$2.apply(ZkUtils.scala:498) >> > at >> kafka.utils.ZkUtils$$anonfun$getReplicaAssignmentForTopics$2.apply(ZkUtils.scala:494) >> > at >> scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:61) >> > at scala.collection.immutable.List.foreach(List.scala:45) >> > at >> kafka.utils.ZkUtils$.getReplicaAssignmentForTopics(ZkUtils.scala:494) >> > at >> kafka.controller.KafkaController.initializeControllerContext(KafkaController.scala:446) >> > at >> kafka.controller.KafkaController.onControllerFailover(KafkaController.scala:220) >> > at >> kafka.controller.KafkaController$$anonfun$1.apply$mcV$sp(KafkaController.scala:85) >> > at >> kafka.server.ZookeeperLeaderElector.elect(ZookeeperLeaderElector.scala:53) >> > at >> kafka.server.ZookeeperLeaderElector.startup(ZookeeperLeaderElector.scala:43) >> > at >> kafka.controller.KafkaController.startup(KafkaController.scala:381) >> > at kafka.server.KafkaServer.startup(KafkaServer.scala:90) >> > at >> kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:34) >> > at kafka.Kafka$.main(Kafka.scala:46) >> > at kafka.Kafka.main(Kafka.scala) >> > Caused by: java.lang.NullPointerException >> > at >> scala.util.parsing.combinator.lexical.Scanners$Scanner.<init>(Scanners.scala:52) >> > at scala.util.parsing.json.JSON$.parseRaw(JSON.scala:71) >> > at scala.util.parsing.json.JSON$.parseFull(JSON.scala:85) >> > at kafka.utils.Json$.liftedTree1$1(Json.scala:17) >> > ... 16 more >> > >> > >> > I couldn't figure out why broker 0 couldn't become leader (since there >> > is only one broker). Anyone has any ideas? >> > >> > thanks! >> > >> > Jason >>
