org.apache.spark.SparkException: An application name must be set in your configuration

2015-07-10 09:09:04   作者：MangoCool   来源：MangoCool

在win7环境下，本机运行本简单Spark应用示例，出现异常：

Exception in thread "main" org.apache.spark.SparkException: An application name must be set in your configuration
	at org.apache.spark.SparkContext.<init>(SparkContext.scala:209)
	at SparkSql$.main(SparkSql.scala:12)
	at SparkSql.main(SparkSql.scala)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)

从提示信息理解：你的应用配置必须要设置名称。

于是首先想到查看一下源码，这是就豁然开朗了：

if (!_conf.contains("spark.master")) {
   throw new SparkException("A master URL must be set in your configuration")
}
if (!_conf.contains("spark.app.name")) {
   throw new SparkException("An application name must be set in your configuration")
}

从源码so easy的看出来，在你的Spark应用配置里面，必须要设置master和app name！

至此问题解决！

标签： SBT Scala exception SparkSql

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