Kerooker opened a new pull request #23487: Fix java `SimpleApp` documentation URL: https://github.com/apache/spark/pull/23487 As is, the example provided by the documentation will crash with `org.apache.spark.SparkException: A master URL must be set in your configuration`. This error happens due to no `Spark Master` being configured. When creating a spark master locally, the simple application works correctly, as [This StackOverflow Answer](https://stackoverflow.com/a/40555616/4257162) will state. --- This change is very important as the original example will not work without this.
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