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Hong Zhiguo commented on YARN-4024: ----------------------------------- There's DNS cache in InetAddress. What's the benefit to have another layer of cache in memory? Maybe easier to control? > YARN RM should avoid unnecessary resolving IP when NMs doing heartbeat > ---------------------------------------------------------------------- > > Key: YARN-4024 > URL: https://issues.apache.org/jira/browse/YARN-4024 > Project: Hadoop YARN > Issue Type: Bug > Reporter: Wangda Tan > Assignee: Hong Zhiguo > > Currently, YARN RM NodesListManager will resolve IP address every time when > node doing heartbeat. When DNS server becomes slow, NM heartbeat will be > blocked and cannot make progress. -- This message was sent by Atlassian JIRA (v6.3.4#6332)