Greenplum-Spark-Connector java.util.NoSuchElementException: None.get
问题 My work Envorinments like bellow: . Hadoop 2.7.2 . Spark 2.3.0 . Greenplum 6.8.1 <- I knew this version is latest. and I have to create dataframe(RDD) from GPDB table. so, I have knew a "Greenplum-spark-connector". An architecture sounds good. but It does not work. I tried like this: spark/bin$spark-shell --master spark://10.40.203.99:7077 --jars /data2/install_files/greenplum-spark_2.11-1.6.2.jar,/data2/install_files/postgresql-42.2.5.jar,/data2/install_files/jetty-io-9.2.26.v20180806.jar,