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Posted to issues@flink.apache.org by "xiangqiao (Jira)" <ji...@apache.org> on 2021/10/12 03:38:00 UTC
[jira] [Commented] (FLINK-24510) Fix the duplicate log output of libraries/connectors，when logback is used
[ https://issues.apache.org/jira/browse/FLINK-24510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17427428#comment-17427428 ]
xiangqiao commented on FLINK-24510:
-----------------------------------
I have contributed PR, who can help assign the ticket to me?
thank you.
> 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
> Priority: Major
> Labels: pull-request-available
> 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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