May I ask how you are starting Spark? It looks like PYTHONHASHSEED is being set: https://github.com/apache/spark/search?utf8=%E2%9C%93&q=PYTHONHASHSEED
Date: Thu, 26 Nov 2015 11:30:09 -0800 Subject: possible bug spark/python/pyspark/rdd.py portable_hash() From: a...@santacruzintegration.com To: user@spark.apache.org I am using spark-1.5.1-bin-hadoop2.6. I used spark-1.5.1-bin-hadoop2.6/ec2/spark-ec2 to create a cluster and configured spark-env to use python3. I get and exception 'Randomness of hash of string should be disabled via PYTHONHASHSEED’. Is there any reason rdd.py should not just set PYTHONHASHSEED ? Should I file a bug? Kind regards Andy details http://spark.apache.org/docs/latest/api/python/pyspark.html?highlight=subtract#pyspark.RDD.subtract Example does not work out of the box Subtract(other, numPartitions=None)Return each value in self that is not contained in other.>>> x = sc.parallelize([("a", 1), ("b", 4), ("b", 5), ("a", 3)]) >>> y = sc.parallelize([("a", 3), ("c", None)]) >>> sorted(x.subtract(y).collect()) [('a', 1), ('b', 4), ('b', 5)] It raises if sys.version >= '3.3' and 'PYTHONHASHSEED' not in os.environ: raise Exception("Randomness of hash of string should be disabled via PYTHONHASHSEED") The following script fixes the problem Sudo printf "\n# set PYTHONHASHSEED so python3 will not generate Exception'Randomness of hash of string should be disabled via PYTHONHASHSEED'\nexport PYTHONHASHSEED=123\n" >> /root/spark/conf/spark-env.sh sudo pssh -i -h /root/spark-ec2/slaves cp /root/spark/conf/spark-env.sh /root/spark/conf/spark-env.sh-`date "+%Y-%m-%d:%H:%M"` Sudo for i in `cat slaves` ; do scp spark-env.sh root@$i:/root/spark/conf/spark-env.sh; done
