I'm trying to connect Flink to a Kafka consumer
I'm using Docker Compose to build 4 containers zookeeper, kafka, Flink JobManager and Flink TaskManager.
For zookeeper and Kafka I'm using wurstmeister images, and for Flink I'm using the official image.
docker-compose.yml
version: '3.1'
services:
zookeeper:
image: wurstmeister/zookeeper:3.4.6
hostname: zookeeper
expose:
- "2181"
ports:
- "2181:2181"
kafka:
image: wurstmeister/kafka:2.11-2.0.0
depends_on:
- zookeeper
ports:
- "9092:9092"
hostname: kafka
links:
- zookeeper
environment:
KAFKA_ADVERTISED_HOST_NAME: kafka
KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
KAFKA_ADVERTISED_PORT: 9092
KAFKA_CREATE_TOPICS: 'pipeline:1:1:compact'
jobmanager:
build: ./flink_pipeline
depends_on:
- kafka
links:
- zookeeper
- kafka
expose:
- "6123"
ports:
- "8081:8081"
command: jobmanager
environment:
JOB_MANAGER_RPC_ADDRESS: jobmanager
BOOTSTRAP_SERVER: kafka:9092
ZOOKEEPER: zookeeper:2181
taskmanager:
image: flink
expose:
- "6121"
- "6122"
links:
- jobmanager
- zookeeper
- kafka
depends_on:
- jobmanager
command: taskmanager
# links:
# - "jobmanager:jobmanager"
environment:
JOB_MANAGER_RPC_ADDRESS: jobmanager
And When I submit a simple job to Dispatcher the Job fails with the following error:
org.apache.kafka.common.errors.TimeoutException: Timeout of 60000ms expired before the position for partition pipeline-0 could be determined
My Job code is:
public class Main {
public static void main( String[] args ) throws Exception
{
// get the execution environment
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
// get input data by connecting to the socket
Properties properties = new Properties();
String bootstrapServer = System.getenv("BOOTSTRAP_SERVER");
String zookeeperServer = System.getenv("ZOOKEEPER");
if (bootstrapServer == null) {
System.exit(1);
}
properties.setProperty("zookeeper", zookeeperServer);
properties.setProperty("bootstrap.servers", bootstrapServer);
properties.setProperty("group.id", "pipeline-analysis");
FlinkKafkaConsumer kafkaConsumer = new FlinkKafkaConsumer<String>("pipeline", new SimpleStringSchema(), properties);
// kafkaConsumer.setStartFromGroupOffsets();
kafkaConsumer.setStartFromLatest();
DataStream<String> stream = env.addSource(kafkaConsumer);
// Defining Pipeline here
// Printing Outputs
stream.print();
env.execute("Stream Pipeline");
}
}