SQLException上的sqlContext HiveDriver错误：不支持方法

Question

我一直在尝试使用sqlContext.read.format("jdbc").options(driver="org.apache.hive.jdbc.HiveDriver")将Hive表放入Spark而没有任何成功。我做过研究并阅读如下：

How to connect to remote hive server from spark

Spark 1.5.1 not working with hive jdbc 1.2.0

http://belablotski.blogspot.in/2016/01/access-hive-tables-from-spark-using.html

我使用了最新的Hortonworks Sandbox 2.6并向社区询问了同样的问题：

https://community.hortonworks.com/questions/156828/pyspark-jdbc-py4jjavaerror-calling-o95load-javasql.html?childToView=156936#answer-156936

通过pyspark，我想做的事情非常简单：

df = sqlContext.read.format("jdbc").options(driver="org.apache.hive.jdbc.HiveDriver", url="jdbc:hive2://localhost:10016/default", dbtable="sample_07",user="maria_dev", password="maria_dev").load()

这给了我这个错误：

17/12/30 19:55:14 INFO HiveConnection: Will try to open client transport with JDBC Uri: jdbc:hive2://localhost:10016/default
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/hdp/current/spark-client/python/pyspark/sql/readwriter.py", line 139, in load
    return self._df(self._jreader.load())
  File "/usr/hdp/current/spark-client/python/lib/py4j-0.9-src.zip/py4j/java_gateway.py", line 813, in __call__
  File "/usr/hdp/current/spark-client/python/pyspark/sql/utils.py", line 45, in deco
    return f(*a, **kw)
  File "/usr/hdp/current/spark-client/python/lib/py4j-0.9-src.zip/py4j/protocol.py", line 308, in get_return_value
py4j.protocol.Py4JJavaError: An error occurred while calling o119.load.
: java.sql.SQLException: Method not supported
at org.apache.hive.jdbc.HiveResultSetMetaData.isSigned(HiveResultSetMetaData.java:143)
at org.apache.spark.sql.execution.datasources.jdbc.JDBCRDD$.resolveTable(JDBCRDD.scala:136)
at org.apache.spark.sql.execution.datasources.jdbc.JDBCRelation.<init>(JDBCRelation.scala:91)
at org.apache.spark.sql.execution.datasources.jdbc.DefaultSource.createRelation(DefaultSource.scala:57)
at org.apache.spark.sql.execution.datasources.ResolvedDataSource$.apply(ResolvedDataSource.scala:158)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:119)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:231)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:381)
at py4j.Gateway.invoke(Gateway.java:259)
at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:133)
at py4j.commands.CallCommand.execute(CallCommand.java:79)
at py4j.GatewayConnection.run(GatewayConnection.java:209)
at java.lang.Thread.run(Thread.java:748)

使用直线，它工作正常

beeline> !connect jdbc:hive2://localhost:10016/default maria_dev maria_dev
Connecting to jdbc:hive2://localhost:10016/default
Connected to: Spark SQL (version 2.1.1.2.6.1.0-129)
Driver: Hive JDBC (version 1.2.1000.2.6.1.0-129)
Transaction isolation: TRANSACTION_REPEATABLE_READ
0: jdbc:hive2://localhost:10016/default> select * from sample_07 limit 2;
+----------+-------------------------+------------+---------+--+
|   code   |       description       | total_emp  | salary  |
+----------+-------------------------+------------+---------+--+
| 00-0000  | All Occupations         | 134354250  | 40690   |
| 11-0000  | Management occupations  | 6003930    | 96150   |
+----------+-------------------------+------------+---------+--+

我也可以这样做：

spark = SparkSession.Builder().appName("testapp").enableHiveSupport().‌getOrCreate()
spark.sql("select * from default.sample_07").collect()

但是这会直接读入Hive元数据。我想将JDBC用于Spark Thrift Server以实现细粒度的安全性。

我可以像这样做PostgreSQL：

sqlContext.read.format("jdbc").options(driver="org.postgresql.Driver")

我也可以使用Scala java.sql.{DriverManager, Connection, Statement, ResultSet}创建JDBC Connection作为客户端来获取Spark。但这基本上将所有数据放入内存，然后手动重新创建Dataframe。

所以问题是：有没有办法用Hive表数据创建Spark数据帧而不将数据加载到像Scala这样的JDBC客户端中，而不是像上面的例子那样使用SparkSession.Builder()？我的用例是我需要处理细粒度的安全性。

Answer 1

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