igreenfield commented on a change in pull request #26624: URL: https://github.com/apache/spark/pull/26624#discussion_r419565281
########## File path: docs/configuration.md ########## @@ -2670,6 +2670,9 @@ 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 to the MDC 2 records: `appId` and `appName` you can add that to your patternLayout `%X{appId}` in order to print in the logs +More over, you can use `spark.sparkContext.setLocalProperty("mdc." + name, "value")` to add user specific data into MDC. Review comment: Done ---------------------------------------------------------------- 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
