sunchao commented on a change in pull request #2080:
URL: https://github.com/apache/hadoop/pull/2080#discussion_r444673117
##########
File path:
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java
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@@ -361,6 +380,23 @@ public RouterRpcServer(Configuration configuration, Router
router,
this.nnProto = new RouterNamenodeProtocol(this);
this.clientProto = new RouterClientProtocol(conf, this);
this.routerProto = new RouterUserProtocol(this);
+
+ long dnCacheExpire = conf.getTimeDuration(
+ DN_REPORT_CACHE_EXPIRE,
+ DN_REPORT_CACHE_EXPIRE_MS_DEFAULT, TimeUnit.MILLISECONDS);
+ this.dnCache = CacheBuilder.newBuilder()
+ .build(new DatanodeReportCacheLoader());
+
+ // Actively refresh the dn cache in a configured interval
+ Executors
Review comment:
I see. Makes sense.
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