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https://issues.apache.org/jira/browse/SPARK-1688?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aaron Davidson resolved SPARK-1688.
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Resolution: Fixed
> PySpark throws unhelpful exception when pyspark cannot be loaded
> ----------------------------------------------------------------
>
> Key: SPARK-1688
> URL: https://issues.apache.org/jira/browse/SPARK-1688
> Project: Spark
> Issue Type: Improvement
> Components: PySpark, Spark Core
> Affects Versions: 0.9.1
> Reporter: Andrew Or
> Assignee: Andrew Or
> Fix For: 1.0.0
>
>
> Currently, if pyspark cannot be loaded, this happens:
> java.io.EOFException
> at java.io.DataInputStream.readInt(DataInputStream.java:392)
> at
> org.apache.spark.api.python.PythonWorkerFactory.startDaemon(PythonWorkerFactory.scala:183)
> at
> org.apache.spark.api.python.PythonWorkerFactory.createThroughDaemon(PythonWorkerFactory.scala:55)
> at
> org.apache.spark.api.python.PythonWorkerFactory.create(PythonWorkerFactory.scala:42)
> at org.apache.spark.SparkEnv.createPythonWorker(SparkEnv.scala:97)
> at org.apache.spark.api.python.PythonRDD.compute(PythonRDD.scala:57)
> at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:262)
> at org.apache.spark.rdd.RDD.iterator(RDD.scala:229)
> This can be caused by a few things:
> (1) PYTHONPATH is not set
> (2) PYTHONPATH does not contain the python directory (or jar, in the case
> of YARN)
> (3) The jar does not contain pyspark files (YARN)
> (4) The jar does not contain py4j files (YARN)
> We should have explicit error messages for each one of them. For (2 - 4), we
> should print out the PYTHONPATH so the user doesn't have to SSH into the
> executor machines themselves to figure this out.
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