解决sqoop导入报错:Caused by: java.sql.SQLException: Protocol violation
报错信息:2017-06-1515:02:15,374INFO[main]org.apache.hadoop.mapred.MapTask:Ignoringexceptionduringclosefororg.apache.hadoop.mapred.MapTask$NewTrackingRecordReader@7555b920java.io.IOException:java.sql.SQLEx