Thank you guys for the comments. Sqoop is the tool of the data migration to transfer data between Hadoop system (HDFS, Hive,Hbase...) and RDBMS (Mysql, Oracle, Postgre...). Sqoop is dependent on MapReduce. Some guys developed the features to supoort sqoop running on Spark, but this feature was not merged into Sqoop trunk and it was not officialy supported by Sqoop.
For Spark, Spark could directly take the JDBC to read Data from RDBMS and conver them into dataframes instead of using sqoop to transfer the data. Spark codes (Scala, Java, JDBC configuration, SQL) may be hard to understand and maintain for the new comers. But anyway Spark is the credible alternative for Sqoop and is the flexible and simple tool to greatly increase the efficiency of data migration, extraction, processing. IMO, it makes sense to remove Sqoop from Bigtop. Thanks, BRs, Yuqi
