ShengJun Zheng created KYLIN-4859: ------------------------------------- Summary: Log4J reinitialized/reconfigured by Spark Logging Key: KYLIN-4859 URL: https://issues.apache.org/jira/browse/KYLIN-4859 Project: Kylin Issue Type: Improvement Components: Others Affects Versions: v4.0.0-alpha Reporter: ShengJun Zheng
Spark Logging was intrucoded in kylin 4.0-alpha, it uses SL4J too, but it will reinitialize log4j when RootLoggers's Appender is empty. See: https://github.com/apache/spark/blob/45e19bb99acd5066723fec2bbdc0c99c696c3daf/core/src/main/scala/org/apache/spark/internal/Logging.scala#L120 this causes some logs of a query logged in file(kylin.log), the other logged in stdout(kylin.out) using configuration file log4j-defaults.properties in spark-core_2.11-2.x.x.jar not firendly to read and anlyze a query performance, and may cause other logging confusions To Avoid this is, default appenders for rootLoggers should be set in kylin-server-log4j.properties -- This message was sent by Atlassian Jira (v8.3.4#803005)