Hi Sridhar
Are you using *ParameterTool *to set the properties? I couldn't see it in
your code, but you use it in the below line:
FlinkKafkaConsumer010<LogMessage> flinkConsumer =
new FlinkKafkaConsumer010<LogMessage>(
Arrays.asList(parameterTool.getRequired("topic").split(",")), new
LogDeserializationSchema(), parameterTool.getProperties());
Make sure that the correct properties are passed to FlinkKafkaConsumer.
Best
Ziyad
Best Regards
*Ziyad Muhammed Mohiyudheen *
407, Internationales Studienzentrum Berlin
Theodor-Heuss-Platz 5
14052 Berlin
*Ph: +49 176 6587 3343 <%2B49%20176%206587%203343>*
*Mail to*: *[email protected] <[email protected]>*
On Tue, Jul 11, 2017 at 9:12 AM, Sridhar Chellappa <[email protected]>
wrote:
> I am pretty sure I am doing something wrong here. Just that I do not
> understand why?
>
> I wrote a small program that reads messages from Kafka and prints it out.
>
>
>
> public class Main {
>
> private static final int CHECKPOINT_INTERVAL = 100000;
>
>
> private static Properties getpropsFromEnv() {
> Properties props = new Properties();
> props.setProperty("bootstrap.servers",
> System.getenv("KAFKA_ADDRESS"));
> props.setProperty("group.id", System.getenv("CONSUMER_GROUP_ID"));
> props.setProperty("topic", System.getenv("KAFKA_TOPIC"));
> return props;
> }
>
> public static void main(String[] args) throws Exception {
>
>
> Properties props = getpropsFromEnv();
>
>
> StreamExecutionEnvironment env =
> StreamExecutionEnvironment.getExecutionEnvironment();
> env.enableCheckpointing(CHECKPOINT_INTERVAL);
> env.setParallelism(1);
> FlinkKafkaConsumer010<LogMessage> flinkConsumer =
> new FlinkKafkaConsumer010<LogMessage>(
>
> Arrays.asList(parameterTool.getRequired("topic").split(",")), new
> LogDeserializationSchema(), parameterTool.getProperties()
> );
>
> DataStream<LogMessage> logMessageDataStream =
> env.addSource(flinkConsumer);
> logMessageDataStream.print();
>
> env.execute("SomeJob");
>
> }
> }
>
> public class LogDeserializationSchema implements
> DeserializationSchema<LogMessage> {
>
> @Override
> public LogMessage deserialize(byte[] message) {
> LogMessage logMessage = null;
> try {
> logMessage = LogMessage.parseFrom(message);
> } catch (InvalidProtocolBufferException e) {
> e.printStackTrace();
> } finally {
> return logMessage;
> }
> }
>
> @Override
> public boolean isEndOfStream(LogMessage nextElement) {
> return false;
> }
>
> @Override
> public TypeInformation<LogMessage> getProducedType() {
> return TypeExtractor.getForClass(LogMessage.class);
> }
> }
>
>
> When I run this program, I do not see any messages being read by the consumer.
>
> Things to note :
>
> 1. I ran kafka-console-consumer using the same Kafka parameters and saw
> continuous output.
>
> 2. My Gradle file has the following depencies :
>
> dependencies {
> compile group: 'ch.qos.logback', name: 'logback-classic', version: '1.1.7'
>
>
> compile 'org.aeonbits.owner:owner:1.0.9'
> compile group: 'com.mashape.unirest', name: 'unirest-java', version:
> '1.4.9' // For driver Suspension
> compile group: 'joda-time', name: 'joda-time', version: '2.9.4'
> compile 'com.google.protobuf:protobuf-java-util:3.1.0'
>
> /*
> * Flink Dependencies
> */
> compile group: 'org.apache.flink', name: 'flink-java', version: '1.3.0'
> compile group: 'org.apache.flink', name:
> 'flink-connector-kafka-0.10_2.10', version: '1.3.0'
> compile group: 'org.apache.flink', name: 'flink-streaming-java_2.10',
> version: '1.3.0'
> compile group: 'org.apache.flink', name: 'flink-clients_2.10', version:
> '1.3.0'
>
>
>
>
> }
>
> Can Someone please help ?
>
>
