Zeppelin spark.executor.extraClassPath 和 --driver-class-path 配置冲突问题

报错如下：

WARN [2017-06-27 15:47:59,777] ({pool-2-thread-2} Logging.scala[logWarning]:66) - 

SPARK_CLASSPATH was detected (set to '/home/raini/spark/lib/mysql-connector-java-5.1.38-bin.jar:').

This is deprecated in Spark 1.0+.

Please instead use:
 - ./spark-submit with --driver-class-path to augment the driver classpath

 - spark.executor.extraClassPath to augment the executor classpath

        
 WARN [2017-06-27 15:47:59,778] ({pool-2-thread-2} Logging.scala[logWarning]:66) - Setting 'spark.executor.extraClassPath' to '/home/raini/spark/lib/mysql-connector-java-5.1.38-bin.jar:'
as a work-around.

ERROR [2017-06-27 15:47:59,780] ({pool-2-thread-2} Logging.scala[logError]:91) - Error initializing SparkContext.

org.apache.spark.SparkException: Found both spark.driver.extraClassPath and SPARK_CLASSPATH. Use only the former.
at org.apache.spark.SparkConf$$anonfun$validateSettings$7$$anonfun$apply$8.apply(SparkConf.scala:543)
at org.apache.spark.SparkConf$$anonfun$validateSettings$7$$anonfun$apply$8.apply(SparkConf.scala:541)
at scala.collection.immutable.List.foreach(List.scala:381)
at org.apache.spark.SparkConf$$anonfun$validateSettings$7.apply(SparkConf.scala:541)
at org.apache.spark.SparkConf$$anonfun$validateSettings$7.apply(SparkConf.scala:529)

解决：

1.提交的作业可以通过加入--driver-class-path参数来设置driver的classpath。

$  bin/spark-submit --master local[2]  --driver-class-path lib/mysql-connector-java-5.1.35.jar --class
 spark.SparkToJDBC ./spark-test_2.10-1.0.jar

2.其实，我们还可以在spark安装包的conf/spark-env.sh通过配置SPARK_CLASSPATH来设置driver的环境变量，如下：

export SPARK_CLASSPATH=$SPARK_CLASSPATH:/iteblog/com/mysql-connector-java-5.1.35.jar

这样也可以解决上面出现的异常。但是，我们不能同时在conf/spark-env.sh里面配置SPARK_CLASSPATH和提交作业加上–driver-class-path参数，否则会出现以上异常。

所以，删掉一个配置即可，这里删掉了spark配置项：export SPARK_CLASSPATH=...