aajisaka commented on a change in pull request #3148:
URL: https://github.com/apache/hadoop/pull/3148#discussion_r660477088
##########
File path:
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
##########
@@ -340,8 +343,7 @@ public static InetSocketAddress createSocketAddr(String
target) {
private DataNodePeerMetrics peerMetrics;
private DataNodeDiskMetrics diskMetrics;
private InetSocketAddress streamingAddr;
-
- // See the note below in incrDatanodeNetworkErrors re: concurrency.
+
private LoadingCache<String, Map<String, Long>> datanodeNetworkCounts;
Review comment:
I think `HashMap<String, LongAdder>` is more efficient than
`ConcurrentHashMap<String, Long>` because the LongAdder instance in the Map is
never replaced in this case.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
