From e789b1d2c1eab6187f54424ed92697ca200c3101 Mon Sep 17 00:00:00 2001
From: Jeff Zhang <zjffdu@apache.org>
Date: Sun, 24 Jan 2016 12:29:26 -0800
Subject: [PATCH] =?UTF-8?q?[SPARK-12120][PYSPARK]=20Improve=20exception=20?=
=?UTF-8?q?message=20when=20failing=20to=20init=E2=80=A6?=
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…ialize HiveContext in PySpark
davies Mind to review ?
This is the error message after this PR
```
15/12/03 16:59:53 WARN ObjectStore: Failed to get database default, returning NoSuchObjectException
/Users/jzhang/github/spark/python/pyspark/sql/context.py:689: UserWarning: You must build Spark with Hive. Export 'SPARK_HIVE=true' and run build/sbt assembly
warnings.warn("You must build Spark with Hive. "
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Users/jzhang/github/spark/python/pyspark/sql/context.py", line 663, in read
return DataFrameReader(self)
File "/Users/jzhang/github/spark/python/pyspark/sql/readwriter.py", line 56, in __init__
self._jreader = sqlContext._ssql_ctx.read()
File "/Users/jzhang/github/spark/python/pyspark/sql/context.py", line 692, in _ssql_ctx
raise e
py4j.protocol.Py4JJavaError: An error occurred while calling None.org.apache.spark.sql.hive.HiveContext.
: java.lang.RuntimeException: java.net.ConnectException: Call From jzhangMBPr.local/127.0.0.1 to 0.0.0.0:9000 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:522)
at org.apache.spark.sql.hive.client.ClientWrapper.<init>(ClientWrapper.scala:194)
at org.apache.spark.sql.hive.client.IsolatedClientLoader.createClient(IsolatedClientLoader.scala:238)
at org.apache.spark.sql.hive.HiveContext.executionHive$lzycompute(HiveContext.scala:218)
at org.apache.spark.sql.hive.HiveContext.executionHive(HiveContext.scala:208)
at org.apache.spark.sql.hive.HiveContext.functionRegistry$lzycompute(HiveContext.scala:462)
at org.apache.spark.sql.hive.HiveContext.functionRegistry(HiveContext.scala:461)
at org.apache.spark.sql.UDFRegistration.<init>(UDFRegistration.scala:40)
at org.apache.spark.sql.SQLContext.<init>(SQLContext.scala:330)
at org.apache.spark.sql.hive.HiveContext.<init>(HiveContext.scala:90)
at org.apache.spark.sql.hive.HiveContext.<init>(HiveContext.scala:101)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:234)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:381)
at py4j.Gateway.invoke(Gateway.java:214)
at py4j.commands.ConstructorCommand.invokeConstructor(ConstructorCommand.java:79)
at py4j.commands.ConstructorCommand.execute(ConstructorCommand.java:68)
at py4j.GatewayConnection.run(GatewayConnection.java:209)
at java.lang.Thread.run(Thread.java:745)
```
Author: Jeff Zhang <zjffdu@apache.org>
Closes #10126 from zjffdu/SPARK-12120.
---
python/pyspark/sql/context.py | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/python/pyspark/sql/context.py b/python/pyspark/sql/context.py
index 91e27cf16e..7f6fb410ab 100644
--- a/python/pyspark/sql/context.py
+++ b/python/pyspark/sql/context.py
@@ -15,6 +15,7 @@
# limitations under the License.
#
+from __future__ import print_function
import sys
import warnings
import json
@@ -571,9 +572,10 @@ class HiveContext(SQLContext):
self._scala_HiveContext = self._get_hive_ctx()
return self._scala_HiveContext
except Py4JError as e:
- raise Exception("You must build Spark with Hive. "
- "Export 'SPARK_HIVE=true' and run "
- "build/sbt assembly", e)
+ print("You must build Spark with Hive. "
+ "Export 'SPARK_HIVE=true' and run "
+ "build/sbt assembly", file=sys.stderr)
+ raise
def _get_hive_ctx(self):
return self._jvm.HiveContext(self._jsc.sc())
--
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