I am using Kafka Server 0.9 with consumer kafka-client version 0.9 and kafka-producer 0.8.2.
Every thing is working great except i am getting lot of info that the coordinator is dead on the consumer
2016-02-25 19:30:45.046 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.048 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.049 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.050 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.051 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.052 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.053 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.054 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.055 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.056 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.057 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.058 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.059 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.060 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.061 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.062 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.062 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.063 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.064 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.065 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.066 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.067 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.068 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.068 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.069 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.070 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.071 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.072 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.072 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.073 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.074 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.075 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.075 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.076 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.077 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.078 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.079 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.079 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.080 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.081 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.082 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.083 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.083 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.084 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.085 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.086 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.086 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.087 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.088 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.089 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.089 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.090 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.091 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.093 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.094 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-02-25 19:30:45.094 INFO 10263 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
I also noticed that the producer is having disconnect connect every 10 minute as the below
2016-03-12 15:55:36 INFO [pool-1-thread-1] - Fetching metadata from broker id:0,host:192.168.72.30,port:9092 with correlation id 41675 for 1 topic(s) Set(act)
2016-03-12 15:55:36 INFO [pool-1-thread-1] - Connected to 192.168.72.30:9092 for producing
2016-03-12 15:55:36 INFO [pool-1-thread-1] - Disconnecting from 192.168.72.30:9092
2016-03-12 15:55:36 INFO [pool-1-thread-1] - Disconnecting from kafkauk.XXXXXXXXXX.co:9092
2016-03-12 15:55:36 INFO [pool-1-thread-1] - Connected to kafkauk.XXXXXXXXXX.co:9092 for producing
this is my producer configuration
metadata.broker.list=192.168.72.30:9092
serializer.class=kafka.serializer.StringEncoder
request.required.acks=1
linger.ms=2000
batch.size=500
and consumer config
bootstrap.servers: kafkauk.xxxxxxxx.co:9092
group.id: cdrServer
client.id: cdrServer
enable.auto.commit: true
auto.commit.interval.ms: 1000
session.timeout.ms: 30000
key.deserializer: org.apache.kafka.common.serialization.StringDeserializer
value.deserializer: org.apache.kafka.common.serialization.StringDeserializer
I could not figure out what does these mean and should i neglect them or i am missing something in the configuration
After i change kafka to debug level on the consumer i found the below
2016-03-13 18:21:55.586 DEBUG 5469 --- [ cdrServer] org.apache.kafka.clients.NetworkClient : Node 2147483647 disconnected.
2016-03-13 18:21:55.586 INFO 5469 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Marking the coordinator 2147483647 dead.
2016-03-13 18:21:55.586 DEBUG 5469 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Issuing group metadata request to broker 0
2016-03-13 18:21:55.586 DEBUG 5469 --- [ cdrServer] org.apache.kafka.clients.NetworkClient : Sending metadata request ClientRequest(expectResponse=true
, callback=null, request=RequestSend(header={api_key=3,api_version=0,correlation_id=183025,client_id=cdrServer}, body={topics=[act]}), isInitiatedByNetworkCli
ent, createdTimeMs=1457893315586, sendTimeMs=0) to node 0
2016-03-13 18:21:55.591 DEBUG 5469 --- [ cdrServer] org.apache.kafka.clients.Metadata : Updated cluster metadata version 296 to Cluster(nodes = [N
ode(0, kafkauk.xxxxxxxxx.co, 9092)], partitions = [Partition(topic = act, partition = 0, leader = 0, replicas = [0,], isr = [0,]])
2016-03-13 18:21:55.592 DEBUG 5469 --- [ cdrServer] o.a.k.c.c.internals.AbstractCoordinator : Group metadata response ClientResponse(receivedTimeMs=1457
893315592, disconnected=false, request=ClientRequest(expectResponse=true, callback=org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient$RequestFu
tureCompletionHandler@1e2de777, request=RequestSend(header={api_key=10,api_version=0,correlation_id=183024,client_id=cdrServer}, body={group_id=cdrServer}), c
reatedTimeMs=1457893315586, sendTimeMs=1457893315586), responseBody={error_code=0,coordinator={node_id=0,host=kafkauk.xxxxxxxx.co,port=9092}})
I am not sure it is a network problem because it happen every 9 minute exactly
Update
I found that is directly related to
connections.max.idle.ms: 300000
What ever i put then i will get disconnected at this value
Marking the coordinator dead happens when there is a Network communication error between the Consumer Client and the Coordinator (Also this can happen when the Coordinator dies and the group needs to rebalance). There are a variety of situations (offset commit request, fetch offset, etc) that can cause this issue. I will suggest that you research what's causing this situations