[jira] [Created] (KAFKA-10469) describeConfigs() for broker loggers returns incorrect values

["Tom Bentley (Jira)" <ji...@apache.org>]

Tom Bentley created KAFKA-10469:
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             Summary: describeConfigs() for broker loggers returns incorrect values
                 Key: KAFKA-10469
                 URL: https://issues.apache.org/jira/browse/KAFKA-10469
             Project: Kafka
          Issue Type: Bug
          Components: core
            Reporter: Tom Bentley
            Assignee: Tom Bentley


{{Log4jController#loggers}} incorrectly uses the root logger's log level for any loggers which lack a configured log level of their own. This is incorrect because loggers without an explicit level inherit their level from their parent logger and this resolved level might be different from the root logger's level. This means that the levels reported from {{Admin.describeConfigs}}, which uses {{Log4jController#loggers}} are incorrect. This can be shown by using the default {{log4j.properties}} and describing a broker's loggers, it reports

{noformat}
kafka.controller=TRACE
kafka.controller.ControllerChannelManager=INFO
kafka.controller.ControllerEventManager$ControllerEventThread=INFO
kafka.controller.KafkaController=INFO
kafka.controller.RequestSendThread=INFO
kafka.controller.TopicDeletionManager=INFO
kafka.controller.ZkPartitionStateMachine=INFO
kafka.controller.ZkReplicaStateMachine=INFO
{noformat}

The default {{log4j.properties}} does indeed set {{kafka.controller}} to {{TRACE}}, but it does not configure the others, so they're actually at {{TRACE}} not {{INFO}} as reported.







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