Hello,
Im using flink-connector-kafka version 1.15.2 to consume messages from a kafka
topic which has 3 partitions that later its connected to to another kafka
source and then processed in a BroadcastProcessFunction.
The Kafka source is created as follows:
Properties properties = new Properties();
properties.setProperty(ConsumerConfig.SESSION_TIMEOUT_MS_CONFIG, "600000");
properties.setProperty(ConsumerConfig.HEARTBEAT_INTERVAL_MS_CONFIG, "1000");
properties.setProperty(ConsumerConfig.MAX_POLL_RECORDS_CONFIG, "200");
properties.setProperty(ConsumerConfig.MAX_POLL_INTERVAL_MS_CONFIG, "900000");
KafkaSource<String> kafkaSource = KafkaSource.<T>builder()
.setBootstrapServers("localhost:9092")
.setTopics("mytopic")
.setGroupId("group-id")
.setClientIdPrefix("client-id")
.setStartingOffsets(OffsetsInitializer.latest())
.setProperty("security.protocol", "SSL")
.setProperty("partition.discovery.interval.ms", "300000")
.setProperties(properties)
.setDeserializer(new StringDeserializationSchema())
.build();
DataStreamSource<String> myStreamSource =
env.fromSource(kafkaSource, WatermarkStrategy.noWatermarks(),
"myStreamSource");
Then I start sending 10 messages per second to the topic and notice that the
consumer starts reading messages but after some minutes the consumer stops to
read messages from the topic, for example if I send 3000 messages to the topic
only around 1200 or 2000 are consumed.
I do not get any exception or error message in the task manager logs, the job
does not restart and the backpressure its around 15 to 20% when its reading
messages and then drops to 0%
Please let me know any suggestion or additional information required to fix
this issue.
Best.
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