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From "Michael Armbrust (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-2797) SchemaRDDs don't support unpersist()
Date Fri, 01 Aug 2014 22:37:39 GMT

     [ https://issues.apache.org/jira/browse/SPARK-2797?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael Armbrust updated SPARK-2797:
------------------------------------

    Target Version/s: 1.1.0

> SchemaRDDs don't support unpersist()
> ------------------------------------
>
>                 Key: SPARK-2797
>                 URL: https://issues.apache.org/jira/browse/SPARK-2797
>             Project: Spark
>          Issue Type: Bug
>          Components: PySpark, SQL
>    Affects Versions: 1.0.2
>            Reporter: Nicholas Chammas
>
> Looks like something simple got missed in the Java layer?
> {code}
> >>> from pyspark.sql import SQLContext
> >>> sqlContext = SQLContext(sc)
> >>> raw = sc.parallelize(['{"a": 5}'])
> >>> events = sqlContext.jsonRDD(raw)
> >>> events.printSchema()
> root
>  |-- a: IntegerType
> >>> events.cache()
> PythonRDD[45] at RDD at PythonRDD.scala:37
> >>> events.unpersist()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/root/spark/python/pyspark/sql.py", line 440, in unpersist
>     self._jschema_rdd.unpersist()
>   File "/root/spark/python/lib/py4j-0.8.1-src.zip/py4j/java_gateway.py", line 537, in
__call__
>   File "/root/spark/python/lib/py4j-0.8.1-src.zip/py4j/protocol.py", line 304, in get_return_value
> py4j.protocol.Py4JError: An error occurred while calling o108.unpersist. Trace:
> py4j.Py4JException: Method unpersist([]) does not exist
> 	at py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:333)
> 	at py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:342)
> 	at py4j.Gateway.invoke(Gateway.java:251)
> 	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:745)
> >>> events.unpersist
> <bound method SchemaRDD.unpersist of PythonRDD[45] at RDD at PythonRDD.scala:37>
> {code}
> Note that the {{unpersist}} method exists but cannot be called without raising the shown
error.
> This is on {{1.0.2-rc1}}.



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