ppkarwasz commented on code in PR #17373:
URL: https://github.com/apache/kafka/pull/17373#discussion_r1850514477


##########
config/log4j2.yaml:
##########
@@ -0,0 +1,164 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Unspecified loggers and loggers with additivity=true output to server.log 
and stdout
+# Note that INFO only applies to unspecified loggers, the log level of the 
child logger is used otherwise
+Configuration:
+  Properties:
+    Property:
+      # Fallback if the system property is not set
+      - name: "kafka.logs.dir"
+        value: "."
+      - name: "logPattern"
+        value: "[%d] %p %m (%c)%n"
+
+  # Appenders configuration
+  # See: https://logging.apache.org/log4j/2.x/manual/appenders.html
+  Appenders:
+    Console:
+      name: STDOUT
+      PatternLayout:
+        pattern: "${logPattern}"
+
+    RollingFile:
+      - name: KafkaAppender
+        fileName: "${sys:kafka.logs.dir}/server.log"
+        filePattern: "${sys:kafka.logs.dir}/server.log.%d{yyyy-MM-dd-HH}"
+        PatternLayout:
+          pattern: "${logPattern}"
+        Polices:
+          TimeBasedTriggeringPolicy:
+            modulate: true
+            interval: 1

Review Comment:
   Since there is only one triggering policy, there is no need to wrap it in a 
[`Policies` 
wrapper](https://logging.apache.org/log4j/2.x/manual/appenders/rolling-file.html#Policies).
   
   BTW: there is a typo in the plugin name: it should be `Policies`, instead of 
`Polices`.



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