1. Libraries conflicts
Error: java.io.IOException: Failed to open native connection to Cassandra at {192.168.0.1}:9042**
To solve it, use Cassandra core driver 2.1.5
2. HiveContext doesn't compatible with Cassandra connector
Exception in thread "main" java.lang.RuntimeException: Failed to load class for data source: org.apache.spark.sql.cassandra
To solve it, use SQLContext instead of HiveContext
3. Alter Cassandra columns in a loop, only partial is changed.
Reason is unknown yet.
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