Kafka Connect - S3 Sink does not consume from topic - Stack Overflow

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I have a S3 sink connector that reads from a Kafka topic and spills to S3. The connector is not consuming from the topic.

This is the connector configuration:

{
  "name": "my-connector",
  "config": {
    "connector.class": "io.confluent.connect.s3.S3SinkConnector",
    "behavior.on.null.values": "ignore",
    "s3.region": "<aws region>",
    "topics.dir": "my-topic",
    "flush.size": "1000",
    "tasks.max": "1",
    "s3.part.size": "5242880",
    "timezone": "UTC",
    "rotate.interval.ms": "30000",
    "locale": "en-US",
    "format.class": "io.confluent.connect.s3.format.avro.AvroFormat",
    "aws.access.key.id": "<aws access key>",
    "errors.deadletterqueue.topic.replication.factor": "1",
    "value.converter": ".apache.kafka.connect.json.JsonConverter",
    "s3.bucket.name": "<aws bucket>",
    "partition.duration.ms": "30000",
    "schemapatibility": "NONE",
    "topics": "my-topic",
    "aws.secret.access.key": "<aws secret key>",
    "task.class": "io.confluent.connect.s3.S3SinkTask",
    "errors.deadletterqueue.topic.name": "dlq-my-topic",
    "partitioner.class": "io.confluent.connect.storage.partitioner.TimeBasedPartitioner",
    "name": "my-connector",
    "errors.tolerance": "all",
    "storage.class": "io.confluent.connect.s3.storage.S3Storage",
    "path.format": "'year'=YYYY/'month'=MM/'day'=dd/'hour'=HH",
    "rotate.schedule.interval.ms": "60000",
    "timestamp.extractor": "Record"
  }
}

This is the connector status:

curl localhost:8083/connectors/my-connector/status
{
  "name": "my-connector",
  "connector": {
    "state": "RUNNING",
    "worker_id": "localhost:8083"
  },
  "tasks": [
    {
      "id": 0,
      "state": "RUNNING",
      "worker_id": "localhost:8083"
    }
  ],
  "type": "sink"
}

Information provided about the Kafka consumer group is as follows: (./kafka-consumer-groups.sh --bootstrap-server kafka:9092 --group connect-my-connector --describe)

GROUP	TOPIC	PARTITION	CURRENT-OFFSET	LOG-END-OFFSET	LAG	CONSUMER-ID	HOST	CLIENT-ID
connect-my-connector	my-topic	0	1182	12072	10890	connector-consumer-my-connector-0-68793e0d-8312-4d20-b23c-5221ca54b0dc	ip	connector-consumer-my-connector-0

I have a S3 sink connector that reads from a Kafka topic and spills to S3. The connector is not consuming from the topic.

This is the connector configuration:

{
  "name": "my-connector",
  "config": {
    "connector.class": "io.confluent.connect.s3.S3SinkConnector",
    "behavior.on.null.values": "ignore",
    "s3.region": "<aws region>",
    "topics.dir": "my-topic",
    "flush.size": "1000",
    "tasks.max": "1",
    "s3.part.size": "5242880",
    "timezone": "UTC",
    "rotate.interval.ms": "30000",
    "locale": "en-US",
    "format.class": "io.confluent.connect.s3.format.avro.AvroFormat",
    "aws.access.key.id": "<aws access key>",
    "errors.deadletterqueue.topic.replication.factor": "1",
    "value.converter": ".apache.kafka.connect.json.JsonConverter",
    "s3.bucket.name": "<aws bucket>",
    "partition.duration.ms": "30000",
    "schemapatibility": "NONE",
    "topics": "my-topic",
    "aws.secret.access.key": "<aws secret key>",
    "task.class": "io.confluent.connect.s3.S3SinkTask",
    "errors.deadletterqueue.topic.name": "dlq-my-topic",
    "partitioner.class": "io.confluent.connect.storage.partitioner.TimeBasedPartitioner",
    "name": "my-connector",
    "errors.tolerance": "all",
    "storage.class": "io.confluent.connect.s3.storage.S3Storage",
    "path.format": "'year'=YYYY/'month'=MM/'day'=dd/'hour'=HH",
    "rotate.schedule.interval.ms": "60000",
    "timestamp.extractor": "Record"
  }
}

This is the connector status:

curl localhost:8083/connectors/my-connector/status
{
  "name": "my-connector",
  "connector": {
    "state": "RUNNING",
    "worker_id": "localhost:8083"
  },
  "tasks": [
    {
      "id": 0,
      "state": "RUNNING",
      "worker_id": "localhost:8083"
    }
  ],
  "type": "sink"
}

Information provided about the Kafka consumer group is as follows: (./kafka-consumer-groups.sh --bootstrap-server kafka:9092 --group connect-my-connector --describe)

GROUP	TOPIC	PARTITION	CURRENT-OFFSET	LOG-END-OFFSET	LAG	CONSUMER-ID	HOST	CLIENT-ID
connect-my-connector	my-topic	0	1182	12072	10890	connector-consumer-my-connector-0-68793e0d-8312-4d20-b23c-5221ca54b0dc	ip	connector-consumer-my-connector-0

So it seems that kafka-connect has an active consumer in the consumer group. What could be the reason that the connector is not consuming from Kafka?

Looking at this - the answer doesn't make sense as authentication isn't enabled in our Kafka cluster. What else could cause a connected kafka-connect connector not to consume messages from a topic? No Apparent errors in the logs during connect startup, plugin loading or connector initialization.

• apache-kafka
• apache-kafka-connect
• s3-kafka-connector

Share Improve this question Follow edited Jan 19 at 11:13 user152468 3,24277 gold badges3030 silver badges6060 bronze badges asked Jan 17 at 20:56 Mr T.Mr T. 4,5181111 gold badges4646 silver badges6868 bronze badges

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1 Answer 1

Sorted by: Reset to default 0

Yes, the configuration above did not consume for me either. When changing the value.converter configuration as shown below, it started consuming and writing to S3. The data in my source topic is Avro data.

What's the data format of the data within your topic?

You may also want to set the connect server logging to trace for the package io.confluent.connect.s3 in your log4j.properties file to get more information.

{
  "name": "s3-sink-connector",
  "config": {
    "connector.class": "io.confluent.connect.s3.S3SinkConnector",
    "behavior.on.null.values": "ignore",
    "s3.region": "$REGION",
    "topics.dir": "pageviews",
    "flush.size": "10",
    "tasks.max": "1",
    "s3.part.size": "5242880",
    "timezone": "UTC",
    "rotate.interval.ms": "600000",
    "locale": "en-US",
    "format.class": "io.confluent.connect.s3.format.avro.AvroFormat",
    "aws.access.key.id": "${AWS_ACCESS_KEY_ID}",
    "errors.deadletterqueue.topic.replication.factor": "1",
    "key.converter": ".apache.kafka.connect.storage.StringConverter",
    "value.converter": "io.confluent.connect.avro.AvroConverter",
    "value.converter.schema.registry.url": "http://localhost:8081",
    "s3.bucket.name": "s3-sink-test ",
    "partition.duration.ms": "30000",
    "schemapatibility": "NONE",
    "topics": "pageviews",
    "aws.secret.access.key": "${AWS_SECRET_ACCESS_KEY}",
    "task.class": "io.confluent.connect.s3.S3SinkTask",
    "errors.deadletterqueue.topic.name": "dlq-my-topic",
    "partitioner.class": "io.confluent.connect.storage.partitioner.TimeBasedPartitioner",
    "errors.tolerance": "all",
    "storage.class": "io.confluent.connect.s3.storage.S3Storage",
    "path.format": "'year'=YYYY/'month'=MM/'day'=dd/'hour'=HH/'minute'=mm",
    "rotate.schedule.interval.ms": "60000",
    "timestamp.extractor": "Record"
  }
}

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