Kafka sink connector: No tasks assigned, even after restart
I have faced this issue. If the resources are less for a SinkTask or SourceTask to start, this can happen.
Memory allocated to the worker may be less some time. By default workers are allocated 250MB. Please increase this. Below is an example to allocate 2GB memory for the worker running in distributed mode.
KAFKA_HEAP_OPTS="-Xmx2G" sh $KAFKA_SERVICE_HOME/connect-distributed $KAFKA_CONFIG_HOME/connect-avro-distributed.properties