gatorsmile commented on a change in pull request #26624: URL: https://github.com/apache/spark/pull/26624#discussion_r441303171
########## File path: docs/configuration.md ########## @@ -2955,6 +2955,12 @@ Spark uses [log4j](http://logging.apache.org/log4j/) for logging. You can config `log4j.properties` file in the `conf` directory. One way to start is to copy the existing `log4j.properties.template` located there. +By default, Spark adds 1 record to the MDC (Mapped Diagnostic Context): `taskName`, which shows something +like `task 1.0 in stage 0.0`. You can add `%X{taskName}` to your patternLayout in Review comment: `patternLayout ` -> `PatternLayout `. Could you give an example to show how to use it in this document? For example, use an example to show how to specify your application names/identifiers. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org
