Whether safe to ignore the warning or should be fixed?

Kafka Connect
1

When I am starting confluentinc/cp-kafka-connect-base:7.0.1 docker image with some self managed connector, can see there are lot of warning (obeviously, I have used those variables in the kafka-connect.properties. Can we ignore those warning or should be fixed?

[2022-02-28 01:15:19,388] WARN The configuration ‘consumer.ssl.endpoint.identification.algorithm’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘producer.request.timeout.ms’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘database.history.consumer.sasl.jaas.config’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘consumer.sasl.mechanism’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘log4j.appender.stdout.layout.conversionpattern’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘offset.storage.topic’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘consumer.security.protocol’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘key.converter’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘database.history.producer.sasl.mechanism’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘consumer.sasl.jaas.config’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘config.storage.topic’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘metrics.context.connect.group.id’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘rest.advertised.host.name’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘database.history.kafka.bootstrap.servers’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘consumer.bootstrap.servers’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘rest.port’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘key.converter.schemas.enable’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘value.converter.schema.registry.url’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘value.converter.schemas.enable’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘database.history.consumer.sasl.mechanism’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘producer.sasl.jaas.config’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘producer.bootstrap.servers’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘plugin.path’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘database.history.consumer.security.protocol’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘producer.retry.backoff.ms’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘database.history.consumer.ssl.endpoint.identification.algorithm’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘metrics.context.connect.kafka.cluster.id’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘value.converter’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘database.history.producer.sasl.jaas.config’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,388] WARN The configuration ‘database.history.producer.ssl.endpoint.identification.algorithm’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,389] WARN The configuration ‘producer.security.protocol’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,389] WARN The configuration ‘database.history.producer.security.protocol’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,389] WARN The configuration ‘status.storage.topic’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,389] WARN The configuration ‘consumer.request.timeout.ms’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,389] WARN The configuration ‘consumer.retry.backoff.ms’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,389] WARN The configuration ‘producer.sasl.mechanism’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,389] WARN The configuration ‘offset.flush.interval.ms’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,389] WARN The configuration ‘cub.kafka.timeout’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,389] WARN The configuration ‘log4j.root.loglevel’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,389] WARN The configuration ‘key.converter.schema.registry.url’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)
[2022-02-28 01:15:19,389] WARN The configuration ‘producer.ssl.endpoint.identification.algorithm’ was supplied but isn’t a known config. (org.apache.kafka.clients.consumer.ConsumerConfig:384)

Thanks
esquare666

2

@esquare666 these warnings are safe to ignore, however, you may want to cleanup the unused configurations in your properties files as they would be a good indication in the future of a misconfiguration. If you get to a non-WARN startup, in the future adding or removing a setting that produces this warning will be a good indication of a mis-named value.

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