Hi all
Because of badversion exception, the id 1 broker is not a leader. But the kafka
thread on that server is already in work. The id 1 broker is only for
replication.
I want to recover the id 1 broker and became a leader.
I had done :
1、 use the “kafka-reassign-partitions.sh” to remove the broker id 1 from
replicas group. And the broker id 1 should be out of touch with kafka cluster.
But, the server.log of other servers are printing lots of error,like:
[2014-01-13 21:56:58,360] INFO Reconnect due to socket error: null
(kafka.consumer.SimpleConsumer)
[2014-01-13 21:56:58,362] WARN [ReplicaFetcherThread-0-1], Error in fetch Name:
FetchRequest; Version: 0; CorrelationId: 35321893; ClientId:
ReplicaFetcherThread-0-1; ReplicaId: 2; MaxWait: 500 ms; MinBytes: 1 bytes;
RequestInfo: [co,4] -> PartitionFetchInfo(0,1048576)
(kafka.server.ReplicaFetcherThread)
java.net.ConnectException: Connection refused
at sun.nio.ch.Net.connect(Native Method)
at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:500)
at kafka.network.BlockingChannel.connect(BlockingChannel.scala:57)
at kafka.consumer.SimpleConsumer.connect(SimpleConsumer.scala:44)
at kafka.consumer.SimpleConsumer.reconnect(SimpleConsumer.scala:57)
at kafka.consumer.SimpleConsumer.liftedTree1$1(SimpleConsumer.scala:79)
at
kafka.consumer.SimpleConsumer.kafka$consumer$SimpleConsumer$$sendRequest(SimpleConsumer.scala:71)
at
kafka.consumer.SimpleConsumer$$anonfun$fetch$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(SimpleConsumer.scala:110)
2、kill the kafka thread running on id 1 broker.
3、I start the kafka service on broker id 1, and it never add to replication
group. Not to speak of becoming a leader.
The question is : what should we do inorder to recover the kafka cluster to
original?
Thanks.
Best regards,
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