CONNECT_LOG4J_LOGGERS does not seem working

[Zainal A]

Hi,
I am looking into why I cannot override the log level for specific class(es).
So in my experiment, I set CONNECT_LOG4J_LOGGERS with "org.apache.kafka.clients.admin.KafkaAdminClient=DEBUG"
Before that I already set LOG_LEVEL to debug just to see which classes have DEBUG logging, then I set that environment variable back to info, and re-run the connect job with CONNECT_LOG4J_LOGGERS is set above.

I check the file /etc/kafka/connect-log4j.properties contains:

log4j.rootLogger=INFO, stdout

log4j.appender.stdout=org.apache.log4j.ConsoleAppender

log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

log4j.appender.stdout.layout.ConversionPattern=[%d] %p %m (%c)%n

log4j.logger.io.confluent.connect.s3.S3SinkTask=DEBUG

and the JVM args has this flag:
-Dlog4j.configuration=file:/etc/kafka/connect-log4j.properties


Unfortunately, I still don't see DEBUG output log for KafkaAdminClient class. Do you know what I missed here?

Thanks,
zainal

[Zainal A]

I followed example from https://docs.confluent.io/platform/current/connect/logging.html#changing-log-levels

I set CONNECT_LOG4J_LOGGERS to org.apache.kafka.connect.runtime.WorkerSinkTask=DEBUG and check the file /etc/kafka/connect-log4j.properties does contain this line:

log4j.logger.org.apache.kafka.connect.runtime.WorkerSinkTask=DEBUG

Yet I still don't see any DEBUG logging. Perhaps I incorrectly use the feature??

[Zainal A]

I looked at our schema registry job, i.e. setting SCHEMA_REGISTRY_LOG4J_LOGGERS to io.confluent.kafka=DEBUG and I am able to see the DEBUG logging.
Looking at the file /etc/schema-registry/log4j.properties, I see it does have this line:

log4j.logger.io.confluent.kafka=DEBUG, stdout

So it looks like that extra ", stdout" may be the change that is missing from /etc/kafka/connect-log4j.properties ? I wonder if this is a known issue?

[Haji imam syafei sjom msc Musa isa al-qqsa]

The Bill

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