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}
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
