Github user tedyu commented on the pull request:
https://github.com/apache/spark/pull/11066#issuecomment-180027386
This error surfaced:
```
[info] 2016-02-04 10:15:21.319 - stderr> Exception in thread "main"
java.lang.LinkageError: loader constraint violation: when resolving method
"org.apache.spark.sql.hive.
client.HiveConfUtil$.conf()Lorg/apache/hadoop/hive/conf/HiveConf;" the class
loader (instance of
org/apache/spark/sql/hive/client/IsolatedClientLoader$$anon$1) of the current
class, org/apache/spark/sql/hive/client/HiveClientImpl, and the class loader
(instance of sun/misc/Launcher$AppClassLoader) for resolved class,
org/apache/spark/sql/hive/client/ HiveConfUtil$, have different Class objects
for the type /hadoop/hive/conf/HiveConf; used in the signature
```
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