[GitHub] [spark] vanzin commented on a change in pull request #24732: [SPARK-27868][core] Better default value and documentation for socket server backlog.

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vanzin commented on a change in pull request #24732: [SPARK-27868][core] Better default value and documentation for socket server backlog.
URL: https://github.com/apache/spark/pull/24732#discussion_r288590770
 
 

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 File path: common/network-common/src/main/java/org/apache/spark/network/util/TransportConf.java
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 @@ -108,8 +108,8 @@ public int numConnectionsPerPeer() {
     return conf.getInt(SPARK_NETWORK_IO_NUMCONNECTIONSPERPEER_KEY, 1);
   }
 
-  /** Requested maximum length of the queue of incoming connections. Default -1 for no backlog. */
-  public int backLog() { return conf.getInt(SPARK_NETWORK_IO_BACKLOG_KEY, -1); }
+  /** Requested maximum length of the queue of incoming connections. Default is 64. */
+  public int backLog() { return conf.getInt(SPARK_NETWORK_IO_BACKLOG_KEY, 64); }
 
 Review comment:
   It's just being explicit, in case there are differences between various JREs. For the most common ones, at least, the default was 50.

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