Hi, by default the Kafka client APIs log a lot on INFO. On IRC Polina and Dimitra were mentioning that. Here is a snippet for the "standalone.xml", to be inserted in the logging subsystem: <logger category="org.apache.kafka.streams.processor"> <level name="WARN"/> </logger> <logger category="org.apache.kafka.clients.producer.ProducerConfig"> <level name="WARN"/> </logger> <logger category="org.apache.kafka.clients.consumer.ConsumerConfig"> <level name="WARN"/> </logger> <logger category="org.apache.kafka.streams.StreamsConfig"> <level name="WARN"/> </logger> Greetings, Matthias -- Matthias Wessendorf blog: http://matthiaswessendorf.wordpress.com/ twitter: http://twitter.com/mwessendorf