Py4JJavaError                             Traceback (most recent call last)
<ipython-input-22-9a60a1cb581c> in <module>()
----> 1 jaccard_sims = rdd2.map(lambda x: jacc_sim(x)).collect()

/opt/spark/python/pyspark/rdd.py in collect(self)
    806         """
    807         with SCCallSiteSync(self.context) as css:
--> 808             port = self.ctx._jvm.PythonRDD.collectAndServe(self._jrdd.rdd())
    809         return list(_load_from_socket(port, self._jrdd_deserializer))
    810

/opt/spark/python/lib/py4j-0.10.4-src.zip/py4j/java_gateway.py in __call__(self, *args)
   1131         answer = self.gateway_client.send_command(command)
   1132         return_value = get_return_value(
-> 1133             answer, self.gateway_client, self.target_id, self.name)
   1134
   1135         for temp_arg in temp_args:

/opt/spark/python/pyspark/sql/utils.py in deco(*a, **kw)
     61     def deco(*a, **kw):
     62         try:
---> 63             return f(*a, **kw)
     64         except py4j.protocol.Py4JJavaError as e:
     65             s = e.java_exception.toString()

/opt/spark/python/lib/py4j-0.10.4-src.zip/py4j/protocol.py in get_return_value(answer, gateway_client, target_id, name)
    317                 raise Py4JJavaError(
    318                     "An error occurred while calling {0}{1}{2}.\n".
--> 319                     format(target_id, ".", name), value)
    320             else:
    321                 raise Py4JError(

Py4JJavaError: An error occurred while calling z:org.apache.spark.api.python.PythonRDD.collectAndServe.
: org.apache.spark.SparkException: Job 2 cancelled because SparkContext was shut down
	at org.apache.spark.scheduler.DAGScheduler$$anonfun$cleanUpAfterSchedulerStop$1.apply(DAGScheduler.scala:808)
	at org.apache.spark.scheduler.DAGScheduler$$anonfun$cleanUpAfterSchedulerStop$1.apply(DAGScheduler.scala:806)
	at scala.collection.mutable.HashSet.foreach(HashSet.scala:78)
	at org.apache.spark.scheduler.DAGScheduler.cleanUpAfterSchedulerStop(DAGScheduler.scala:806)
	at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onStop(DAGScheduler.scala:1668)
	at org.apache.spark.util.EventLoop.stop(EventLoop.scala:83)
	at org.apache.spark.scheduler.DAGScheduler.stop(DAGScheduler.scala:1587)
	at org.apache.spark.SparkContext$$anonfun$stop$8.apply$mcV$sp(SparkContext.scala:1833)
	at org.apache.spark.util.Utils$.tryLogNonFatalError(Utils.scala:1283)
	at org.apache.spark.SparkContext.stop(SparkContext.scala:1832)
	at org.apache.spark.scheduler.cluster.YarnClientSchedulerBackend$MonitorThread.run(YarnClientSchedulerBackend.scala:108)
	at org.apache.spark.scheduler.DAGScheduler.runJob(DAGScheduler.scala:628)
	at org.apache.spark.SparkContext.runJob(SparkContext.scala:1925)
	at org.apache.spark.SparkContext.runJob(SparkContext.scala:1938)
	at org.apache.spark.SparkContext.runJob(SparkContext.scala:1951)
	at org.apache.spark.SparkContext.runJob(SparkContext.scala:1965)
	at org.apache.spark.rdd.RDD$$anonfun$collect$1.apply(RDD.scala:936)
	at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
	at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
	at org.apache.spark.rdd.RDD.withScope(RDD.scala:362)
	at org.apache.spark.rdd.RDD.collect(RDD.scala:935)
	at org.apache.spark.api.python.PythonRDD$.collectAndServe(PythonRDD.scala:453)
	at org.apache.spark.api.python.PythonRDD.collectAndServe(PythonRDD.scala)
	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:244)
	at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
	at py4j.Gateway.invoke(Gateway.java:280)
	at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
	at py4j.commands.CallCommand.execute(CallCommand.java:79)
	at py4j.GatewayConnection.run(GatewayConnection.java:214)
	at java.lang.Thread.run(Thread.java:748)