showuon commented on code in PR #17373:
URL: https://github.com/apache/kafka/pull/17373#discussion_r1843502542


##########
bin/connect-distributed.sh:
##########
@@ -22,8 +22,15 @@ fi
 
 base_dir=$(dirname $0)
 
-if [ "x$KAFKA_LOG4J_OPTS" = "x" ]; then
+if [ -f "$base_dir/../config/connect-log4j.properties" ]; then
+    echo DEPRECATED: Using Log4j 1.x configuration file 
\$KAFKA_HOME/config/connect-log4j.properties >&2
+    echo To use a Log4j 2.x configuration, create a 
\$KAFKA_HOME/config/log4j2.xml file and remove the Log4j 1.x configration. >&2
+    echo See 
https://logging.apache.org/log4j/2.x/migrate-from-log4j1.html#Log4j2ConfigurationFormat
 for details about Log4j configuration file migration. >&2
     export 
KAFKA_LOG4J_OPTS="-Dlog4j.configuration=file:$base_dir/../config/connect-log4j.properties"
+elif [ -f "$base_dir/../config/connect-log4j2.properties" ]; then
+    export 
KAFKA_LOG4J_OPTS="-Dlog4j2.configurationFile=$base_dir/../config/connect-log4j2.properties"
+elif [ -f "$base_dir/../config/connect-log4j2.xml" ]; then
+    export 
KAFKA_LOG4J_OPTS="-Dlog4j2.configurationFile=$base_dir/../config/connect-log4j2.xml"

Review Comment:
   Hmm... it makes sense. Already, let's keep the log4j.properties as the 
highest priority. Thanks.



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