virajjasani commented on code in PR #5315:
URL: https://github.com/apache/hadoop/pull/5315#discussion_r1087096464
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java:
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@@ -360,7 +358,8 @@ public class DataNode extends ReconfigurableBase
FS_GETSPACEUSED_JITTER_KEY,
FS_GETSPACEUSED_CLASSNAME));
- public static final Log METRICS_LOG =
LogFactory.getLog("DataNodeMetricsLog");
+ public static final org.apache.log4j.Logger METRICS_LOG =
+ org.apache.log4j.Logger.getLogger("DataNodeMetricsLog");
Review Comment:
I agree for using slf4j directly but the problem here is that
`makeMetricsLoggerAsync()` is adding async appenders and using few more APIs
like `setAdditivity()` and `removeAppender()` directly from log4j.
Hence, for this PR, it would be difficult to switch to using slf4j. But yes
this work is planned as a sub-task.
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