Github user tedyu commented on a diff in the pull request: https://github.com/apache/spark/pull/12315#discussion_r59519389 --- Diff: common/network-common/src/main/java/org/apache/spark/network/client/TransportClientFactory.java --- @@ -149,25 +148,35 @@ public TransportClient createClient(String remoteHost, int remotePort) throws IO } if (cachedClient.isActive()) { - logger.trace("Returning cached connection to {}: {}", address, cachedClient); + logger.trace("Returning cached connection to {}: {}", + cachedClient.getSocketAddress(), cachedClient); return cachedClient; } } // If we reach here, we don't have an existing connection open. Let's create a new one. // Multiple threads might race here to create new connections. Keep only one of them active. + final long preResolveHost = System.nanoTime(); + final InetSocketAddress resolvedAddress = new InetSocketAddress(remoteHost, remotePort); + final long hostResolveTimeMs = (System.nanoTime() - preResolveHost) / 1000000; + if (hostResolveTimeMs > 2000) { --- End diff -- Should the value of 2000 be configurable ?
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