dmvk commented on a change in pull request #18846:
URL: https://github.com/apache/flink/pull/18846#discussion_r810877412
##########
File path: tools/ci/log4j.properties
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@@ -37,15 +37,33 @@ appender.file.fileName =
${sys:log.dir}/mvn-${sys:mvn.forkNumber}.log
appender.file.layout.type = PatternLayout
appender.file.layout.pattern = %d{HH:mm:ss,SSS} [%20t] %-5p %-60c %x - %m%n
+# -----------------------------------------------------------------------------
+# ZooKeeper-related logs should end up here
+# -----------------------------------------------------------------------------
+appender.zk.name = ZooKeeperAppender
+appender.zk.type = FILE
+appender.zk.fileName = ${sys:log.dir}/zookeeper-${sys:mvn.forkNumber}.log
+appender.zk.layout.type = PatternLayout
+appender.zk.layout.pattern = %d{HH:mm:ss,SSS} [%20t] %-5p %-60c %x - %m%n
+
# suppress the irrelevant (wrong) warnings from the netty channel handler
logger.netty.name = org.jboss.netty.channel.DefaultChannelPipeline
logger.netty.level = ERROR
+
+# collecting ZooKeeper-related logs in separate log file
logger.zookeeper.name = org.apache.zookeeper
-logger.zookeeper.level = ERROR
+logger.zookeeper.level = INFO
+logger.zookeeper.additivity = false
+logger.zookeeper.appenderRef.zk.ref = ZooKeeperAppender
logger.shaded_zookeeper.name = org.apache.flink.shaded.zookeeper3
-logger.shaded_zookeeper.level = ERROR
+logger.shaded_zookeeper.level = INFO
+logger.shaded_zookeeper.additivity = false
+logger.shaded_zookeeper.appenderRef.zk.ref = ZooKeeperAppender
logger.zkquorum.name = org.apache.zookeeper.server.quorum.QuorumCnxManager
Review comment:
this have no effect as it's already covered by the `logger.zookeeper`
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