我正在关注IBM bluemix的教程，并尝试从在cloudant db中创建的犯罪数据库中提取数据。我正在使用ipython notebook。
尝试连接数据库时遇到错误
我已经相应地在cloudant上创建了db，但在尝试连接到db时出错了
<pre>
root
|-- _id: string (nullable = true)
|-- _rev: string (nullable = true)
|-- geometry: struct (nullable = true)
| |-- coordinates: array (nullable = true)
| | |-- element: double (containsNull = true)
| |-- type: string (nullable = true)
|-- properties: struct (nullable = true)
| |-- compnos: string (nullable = true)
| |-- domestic: boolean (nullable = true)
| |-- fromdate: long (nullable = true)
| |-- main_crimecode: string (nullable = true)
| |-- naturecode: string (nullable = true)
| |-- reptdistrict: string (nullable = true)
| |-- shooting: boolean (nullable = true)
| |-- source: string (nullable = true)
|-- type: string (nullable = true)
---------------------------------------------------------------------------
Py4JJavaError Traceback (most recent call last)
<ipython-input-1-7370c766a2d0> in <module>()
9
10
---> 11 cloudantdata.select("properties.naturecode").show()
12
13
/usr/local/src/bluemix_ipythonspark_141/spark/python/pyspark/sql/dataframe.py in show(self, n)
256 +---+-----+
257 """
--> 258 print(self._jdf.showString(n))
259
260 def __repr__(self):
/usr/local/src/bluemix_ipythonspark_141/spark/python/lib/py4j-0.8.2.1-src.zip/py4j/java_gateway.py in __call__(self, *args)
536 answer = self.gateway_client.send_command(command)
537 return_value = get_return_value(answer, self.gateway_client,
--> 538 self.target_id, self.name)
539
540 for temp_arg in temp_args:
/usr/local/src/bluemix_ipythonspark_141/spark/python/lib/py4j-0.8.2.1-src.zip/py4j/protocol.py in get_return_value(answer, gateway_client, target_id, name)
298 raise Py4JJavaError(
299 'An error occurred while calling {0}{1}{2}.\n'.
--> 300 format(target_id, '.', name), value)
301 else:
302 raise Py4JError(
Py4JJavaError: An error occurred while calling o40.showString.
: org.apache.spark.SparkException: Job aborted due to stage failure: Task 0 in stage 7.0 failed 10 times, most recent failure: Lost task 0.9 in stage 7.0 (TID 29, yp-spark-dal09-env5-0046): java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 8
at org.apache.spark.sql.catalyst.CatalystTypeConverters$.convertRowWithConverters(CatalystTypeConverters.scala:348)
at org.apache.spark.sql.catalyst.CatalystTypeConverters$$anonfun$createToCatalystConverter$4.apply(CatalystTypeConverters.scala:180)
at org.apache.spark.sql.execution.RDDConversions$$anonfun$rowToRowRdd$1$$anonfun$apply$2.apply(ExistingRDD.scala:62)
at org.apache.spark.sql.execution.RDDConversions$$anonfun$rowToRowRdd$1$$anonfun$apply$2.apply(ExistingRDD.scala:59)
at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
at scala.collection.Iterator$$anon$10.next(Iterator.scala:312)
at scala.collection.Iterator$class.foreach(Iterator.scala:727)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
at scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:48)
at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:103)
at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:47)
at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:273)
at scala.collection.AbstractIterator.to(Iterator.scala:1157)
at scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:265)
at scala.collection.AbstractIterator.toBuffer(Iterator.scala:1157)
at scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:252)
at scala.collection.AbstractIterator.toArray(Iterator.scala:1157)
at org.apache.spark.sql.execution.SparkPlan$$anonfun$3.apply(SparkPlan.scala:143)
at org.apache.spark.sql.execution.SparkPlan$$anonfun$3.apply(SparkPlan.scala:143)
at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1775)
at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1775)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:63)
at org.apache.spark.scheduler.Task.run(Task.scala:70)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:213)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1157)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:627)
at java.lang.Thread.run(Thread.java:801)
Driver stacktrace:
at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1273)
at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1264)
at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1263)
at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
at org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1263)
at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:730)
at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:730)
at scala.Option.foreach(Option.scala:236)
at org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:730)
at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1457)
at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1418)
at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48)
</pre>
＆＃34;程序2：创建一个Python笔记本来分析Cloudant数据＆＃34;
sqlContext = SQLContext(sc)
cloudantdata = sqlContext.read.format("com.cloudant.spark").\
option("cloudant.host","borischow.cloudant.com").\
option("cloudant.username", "borischow").\
option("cloudant.password","xxxxxx").\
load("crimes")
cloudantdata.printSchema()
cloudantdata.count()
cloudantdata.select("properties.naturecode").show()
disturbDF = cloudantdata.filter("properties.naturecode = 'DISTRB'")
disturbDF.show()
disturbDF.select("properties").write.format("com.cloudant.spark").\
option("cloudant.host","borischow.cloudant.com").\
option("cloudant.username", "borischow").\
option("cloudant.password","xxxxxx").\
save("crimes_filtered")