Kalpit Shah created SPARK-1630: ---------------------------------- Summary: PythonRDDs don't handle nulls gracefully Key: SPARK-1630 URL: https://issues.apache.org/jira/browse/SPARK-1630 Project: Spark Issue Type: Bug Components: PySpark Affects Versions: 0.9.0, 0.9.1 Reporter: Kalpit Shah Fix For: 1.0.0
If PythonRDDs receive a null element in iterators, they currently NPE. It would be better do log a DEBUG message and skip the write of NULL elements. Here are the 2 stack traces : 14/04/22 03:44:19 ERROR executor.Executor: Uncaught exception in thread Thread[stdin writer for python,5,main] java.lang.NullPointerException at org.apache.spark.api.python.PythonRDD$.writeIteratorToStream(PythonRDD.scala:267) at org.apache.spark.api.python.PythonRDD$$anon$2.run(PythonRDD.scala:88) ------------------------------------------------------------------------------------- Py4JJavaError: An error occurred while calling z:org.apache.spark.api.python.PythonRDD.writeToFile. : java.lang.NullPointerException at org.apache.spark.api.python.PythonRDD$.writeUTF(PythonRDD.scala:273) at org.apache.spark.api.python.PythonRDD$$anonfun$writeIteratorToStream$2.apply(PythonRDD.scala:247) at org.apache.spark.api.python.PythonRDD$$anonfun$writeIteratorToStream$2.apply(PythonRDD.scala:246) at scala.collection.Iterator$class.foreach(Iterator.scala:727) at scala.collection.AbstractIterator.foreach(Iterator.scala:1157) at org.apache.spark.api.python.PythonRDD$.writeIteratorToStream(PythonRDD.scala:246) at org.apache.spark.api.python.PythonRDD$.writeToFile(PythonRDD.scala:285) at org.apache.spark.api.python.PythonRDD$.writeToFile(PythonRDD.scala:280) at org.apache.spark.api.python.PythonRDD.writeToFile(PythonRDD.scala) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:231) at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:379) at py4j.Gateway.invoke(Gateway.java:259) at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132) at py4j.commands.CallCommand.execute(CallCommand.java:79) at py4j.GatewayConnection.run(GatewayConnection.java:207) at java.lang.Thread.run(Thread.java:744) -- This message was sent by Atlassian JIRA (v6.2#6252)