huangzhaobo99 commented on code in PR #5597:
URL: https://github.com/apache/hadoop/pull/5597#discussion_r1582490565
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java:
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@@ -2630,6 +2631,28 @@ public int getActiveTransferThreadCount() {
@Override // DataNodeMXBean
public Map<String, Map<String, Long>> getDatanodeNetworkCounts() {
+ int maxDisplay =
getConf().getInt(DFSConfigKeys.DFS_DATANODE_NETWORKERRORS_DISPLAY_TOPCOUNT,
+ DFSConfigKeys.DFS_DATANODE_NETWORKERRORS_DISPLAY_TOPCOUNT_DEFAULT);
+ if (maxDisplay >= 0) {
Review Comment:
Can we first determine the size of the map? If it is less than N, we can
return it directly.
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