TengYao Chi created KAFKA-18243:
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Summary: Loggers#loggers should not add rootLogger again.
Key: KAFKA-18243
URL: https://issues.apache.org/jira/browse/KAFKA-18243
Project: Kafka
Issue Type: Bug
Reporter: TengYao Chi
Assignee: TengYao Chi
Fix For: 4.0.0
In log4j1, the {{LogManager#getCurrentLoggers}} method returns all loggers
except for the root logger. Therefore, in the
{{org.apache.kafka.connect.runtime.Loggers#loggers}} method, the root logger
needs to be manually added back to the returned result.
However, in the new log4j2, the {{getCurrentLoggers}} method no longer exists.
Instead, the {{LoggerContext.getConfiguration().getLoggers()}} method is used,
which returns all loggers, including the root logger. As a result, following
the current logic in the {{org.apache.kafka.connect.runtime.Loggers#loggers}}
method would result in a collection containing two root loggers.
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