[SPARK-15806][DOCUMENTATION] update doc for SPARK_MASTER_IP

## What changes were proposed in this pull request?

SPARK_MASTER_IP is a deprecated environment variable. It is replaced by SPARK_MASTER_HOST according to MasterArguments.scala.

## How was this patch tested?

Manually verified.

Author: bomeng <bmeng@us.ibm.com>

Closes #13543 from bomeng/SPARK-15806.

1 files changed, 7 insertions, 1 deletions

diff --git a/core/src/main/scala/org/apache/spark/deploy/master/MasterArguments.scala b/core/src/main/scala/org/apache/spark/deploy/master/MasterArguments.scala
index 585e0839d0..c63793c16d 100644
--- a/core/src/main/scala/org/apache/spark/deploy/master/MasterArguments.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/master/MasterArguments.scala
@@ -20,18 +20,24 @@ package org.apache.spark.deploy.master
 import scala.annotation.tailrec
 
 import org.apache.spark.SparkConf
+import org.apache.spark.internal.Logging
 import org.apache.spark.util.{IntParam, Utils}
 
 /**
  * Command-line parser for the master.
  */
-private[master] class MasterArguments(args: Array[String], conf: SparkConf) {
+private[master] class MasterArguments(args: Array[String], conf: SparkConf) extends Logging {
   var host = Utils.localHostName()
   var port = 7077
   var webUiPort = 8080
   var propertiesFile: String = null
 
   // Check for settings in environment variables
+  if (System.getenv("SPARK_MASTER_IP") != null) {
+    logWarning("SPARK_MASTER_IP is deprecated, please use SPARK_MASTER_HOST")
+    host = System.getenv("SPARK_MASTER_IP")
+  }
+
   if (System.getenv("SPARK_MASTER_HOST") != null) {
     host = System.getenv("SPARK_MASTER_HOST")
   }