[GitHub] [hadoop] ferhui commented on a change in pull request #3596: HDFS-16287. Support to make dfs.namenode.avoid.read.slow.datanode and dfs.namenode.block-placement-policy.exclude-slow-nodes.enabled reconfigurable

[GitBox <gi...@apache.org>]

ferhui commented on a change in pull request #3596:
URL: https://github.com/apache/hadoop/pull/3596#discussion_r740948534



##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
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@@ -260,17 +257,14 @@
     final Timer timer = new Timer();
     this.slowPeerTracker = dataNodePeerStatsEnabled ?
         new SlowPeerTracker(conf, timer) : null;
-    this.excludeSlowNodesEnabled = conf.getBoolean(

Review comment:
       Is it unused? If so we can remove it from hdfs-default.xml.




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