Is it possible to get the current spark context settings in PySpark

Question

I m trying to get the path to spark worker dir for the current sparkcontext   If I explicitly set it as a config param  I can read it back out of SparkConf  but is there anyway to access the complete config  including all defaults  using PySpark

User · Answer

You can use  sc sparkContext getConf getAll  For example  I often have the following at the top of my Spark programs  logger info sc sparkContext getConf getAll mkString  quot  n quot

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For a complete overview of your Spark environment and configuration I found the following code snippets useful   SparkContext   for item in sorted sc  conf getAll     print item    Hadoop Configuration   hadoopConf      iterator   sc  jsc hadoopConfiguration   iterator   while iterator hasNext        prop   iterator next       hadoopConf prop getKey      prop getValue   for item in sorted hadoopConf items     print item    Environment variables   import os for item in sorted os environ items     print item

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I would suggest you try the method below in order to get the current spark context settings  SparkConf getAll    as accessed by SparkContext sc  conf  Get the default configurations specifically for Spark 2 1  spark sparkContext getConf   getAll     Stop the current Spark Session spark sparkContext stop    Create a Spark Session spark   SparkSession builder config conf conf  getOrCreate

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Yes   sc getConf   getAll    Which uses the method   SparkConf getAll     as accessed by  SparkContext sc getConf     Note the Underscore  that makes this tricky   I had to look at the spark source code to figure it out       But it does work   In  4   sc getConf   getAll   Out 4     u spark master   u local      u spark rdd compress   u True      u spark serializer objectStreamReset   u 100      u spark app name   u PySparkShell

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For Spark 2  you can also use when using scala  spark conf getAll    spark as spark session

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Not sure if you can get all the default settings easily  but specifically for the worker dir  it s quite straigt-forward   from pyspark import SparkFiles print SparkFiles getRootDirectory

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Unfortunately  no  the Spark platform as of version 2 3 1 does not provide any way to programmatically access the value of every property at run time  It provides several methods to access the values of properties that were explicitly set through a configuration file  like spark-defaults conf   set through the SparkConf object when you created the session  or set through the command line when you submitted the job  but none of these methods will show the default value for a property that was not explicitly set  For completeness  the best options are    The Spark application   s web UI  usually at http    lt driver gt  4040  has an    Environment    tab with a property value table  The SparkContext keeps a hidden reference to its configuration in PySpark  and the configuration provides a getAll method  spark sparkContext  conf getAll    Spark SQL provides the SET command that will return a table of property values  spark sql  SET   toPandas    You can also use SET -v to include a column with the property   s description     These three methods all return the same data on my cluster

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Suppose I want to increase the driver memory in runtime using Spark Session   s2   SparkSession builder config  spark driver memory    29g   getOrCreate     Now I want to view the updated settings   s2 conf get  spark driver memory     To get all the settings  you can make use of spark sparkContext  conf getAll      Hope this helps

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Simply running sc getConf   getAll    should give you a list with all settings

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If you want to see the configuration in data bricks use the below command spark sparkContext  conf getAll

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update configuration in Spark 2 3 1  To change the default spark configurations you can follow these steps   Import the required classes  from pyspark conf import SparkConf from pyspark sql import SparkSession   Get the default configurations  spark sparkContext  conf getAll     Update the default configurations  conf   spark sparkContext  conf setAll    spark executor memory    4g      spark app name    Spark Updated Conf      spark executor cores    4      spark cores max    4      spark driver memory   4g       Stop the current Spark Session  spark sparkContext stop     Create a Spark Session  spark   SparkSession builder config conf conf  getOrCreate

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Spark 1 6   sc getConf getAll foreach println

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Just for the records the analogous java version   Tuple2 lt String  String gt  sc     sparkConf getAll    for  int i   0  i  lt  sc length  i          System out println sc i

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Spark 2 1   spark sparkContext getConf   getAll   where spark is your sparksession  gives you a dict with all configured settings

[apache-spark] Is it possible to get the current spark context settings in PySpark?

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