Type change of HiveWarehouseSession from interface to class in HDP 3.1.4

[derSascha]

Hi,

we wrote Spark code that works on HDP 3.x using the HiveWarehouseSession. In the last version (HDP 3.1.4) it fails with:

java.lang.IncompatibleClassChangeError: Found class com.hortonworks.hwc.HiveWarehouseSession, but interface was expected

This repository does not contain any commits on that, but the files here and the jar files in HDP 3.1.4 contains an abstract class instead of an interface.

Why was that changed? This breaks all compiled code... Is there a known workaround to be compatible with HDP 3.x and HDP 3.1.4+?

[derSascha]

As a workaround, parts of the HiveWarehouseSession can be used directly:

import com.hortonworks.hwc.HiveWarehouseSession;
...
HiveWarehouseSession session = HiveWarehouseSession.session(sparkSession);

becomes

import com.hortonworks.spark.sql.hive.llap.HiveWarehouseBuilder;
import com.hortonworks.spark.sql.hive.llap.HiveWarehouseSession;
...
HiveWarehouseSession session = HiveWarehouseBuilder.session(sparkSession);

[SalNedia]

I used in this way:
import com.hortonworks.spark.sql.hive.llap.HiveWarehouseBuilder;
import com.hortonworks.spark.sql.hive.llap.HiveWarehouseSession;
...
HiveWarehouseSession session = HiveWarehouseBuilder.session(sparkSession);
HiveWarehouseSessionImpl hive = session.build();
...
hive.setDatabase(db_name);
...

and i get:

User class threw exception: java.lang.NoSuchMethodError: com.hortonworks.spark.sql.hive.llap.HiveWarehouseSessionImpl.sql(Ljava/lang/String;)Lorg/apache/spark/sql/Dataset;

Any suggestion?