[jira] [Created] (FLINK-24510) Fix the duplicate log output of libraries/connectors，when logback is used

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

xiangqiao created FLINK-24510:
---------------------------------

             Summary: Fix the duplicate log output of libraries/connectors，when logback is used
                 Key: FLINK-24510
                 URL: https://issues.apache.org/jira/browse/FLINK-24510
             Project: Flink
          Issue Type: Bug
          Components: Deployment / Scripts
    Affects Versions: 1.14.0
            Reporter: xiangqiao
         Attachments: image-2021-10-12-10-52-22-389.png

When logback is used, the logs of libraries / connectors are output repeatedly.

!image-2021-10-12-10-52-22-389.png!

 

By default, *appenders are cumulative*: a logger will log to the appenders attached to itself (if any) as well as all the appenders attached to its ancestors. Thus, attaching the same appender to multiple loggers will cause logging output to be duplicated.

[http://logback.qos.ch/manual/configuration.html#cumulative]

 

We can solve this problem in the following ways：
{code:java}
<!-- The following lines keep the log level of common libraries/connectors on
     log level INFO. The root logger does not override this. You have to manually
     change the log levels here. -->
<logger name="akka" level="INFO"/>
<logger name="org.apache.kafka" level="INFO"/>
<logger name="org.apache.hadoop" level="INFO"/>
<logger name="org.apache.zookeeper" level="INFO"/>

<!-- Suppress the irrelevant (wrong) warnings from the Netty channel handler -->
<logger name="org.jboss.netty.channel.DefaultChannelPipeline" level="ERROR"/>
{code}
 

 



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