Vit Koma created KAFKA-9747:
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Summary: No tasks created for a connector
Key: KAFKA-9747
URL: https://issues.apache.org/jira/browse/KAFKA-9747
Project: Kafka
Issue Type: Bug
Components: KafkaConnect
Affects Versions: 2.4.0
Environment: OS: Ubuntu 18.04 LTS
Platform: Confluent Platform 5.4
HW: The same behaviour on various AWS instances - from t3.small to c5.xlarge
Reporter: Vit Koma
We are running Kafka Connect in a distributed mode on 3 nodes using Debezium
(MongoDB) and Confluent S3 connectors. When adding a new connector via the REST
API the connector is created in RUNNING state, but no tasks are created for the
connector.
Pausing and resuming the connector does not help. When we stop all workers and
then start them again, the tasks are created and everything runs as it should.
The issue does not show up if we run only a single node.
The issue is not caused by the connector plugins, because we see the same
behaviour for both Debezium and S3 connectors. Also in debug logs I can see
that Debezium is correctly returning a task configuration from the
Connector.taskConfigs() method.
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