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changes.mady.by.user Stanislav Kozlovski

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changes.mady.by.user Kamal Chandraprakash

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Ideally, Kafka would support dynamically changing log levels and address all of the aforementioned concerns out of the box.

We propose extending the IncrementalAlterConfig/DescribeConfig Admin API with functionality for dynamically altering the a single broker's log level.

This approach would also pave the way for even finer-grained logging logic (e.g log DEBUG level only for a certain topic) and would allow us to leverage the existing AlterConfigPolicy for custom user-defined validation of log-level changes.
These log-level changes will be temporary and reverted on broker restart - we will not persist them anywhere.

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bin/kafka-configs.sh --bootstrap-server localhost:9092 --describe --entity-type broker-logger loggers --entity-name 0  // show all the log levels for broker 0
 
bin/kafka-configs.sh --bootstrap-server localhost:9092 --alter --add-config "kafka.server.ReplicaManager=WARN,kafka.server.KafkaApis=DEBUG" --entity-type broker-logger loggers --entity-name 0  // set some log levels for broker 0
 
bin/kafka-configs.sh --bootstrap-server localhost:9092 --alter --delete-config kafka.server.ReplicaManager --entity-type broker-logger loggers --entity-name 0 // will set the log level to the ROOT logger level

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