Davies Liu created SPARK-6886:
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Summary: Big closure in PySpark will fail during shuffle
Key: SPARK-6886
URL: https://issues.apache.org/jira/browse/SPARK-6886
Project: Spark
Issue Type: Bug
Components: PySpark
Affects Versions: 1.3.0, 1.2.1, 1.4.0
Reporter: Davies Liu
Assignee: Davies Liu
Priority: Blocker
Reported by beifei.zhou <beifei.zhou at ximalaya.com>:
I am using spark to process bid datasets. However, there is always problem when
executing reduceByKey on a large dataset, whereas with a smaller dataset. May
I asked you how could I solve this issue?
The error is always like this:
{code}
15/04/09 11:27:46 ERROR Executor: Exception in task 3.0 in stage 1.0 (TID 5)
org.apache.spark.api.python.PythonException: Traceback (most recent call last):
File "/Users/nali/Softwares/spark/python/pyspark/worker.py", line 90, in main
command = pickleSer.loads(command.value)
File "/Users/nali/Softwares/spark/python/pyspark/broadcast.py", line 106, in
value
self._value = self.load(self._path)
File "/Users/nali/Softwares/spark/python/pyspark/broadcast.py", line 87, in
load
with open(path, 'rb', 1 << 20) as f:
IOError: [Errno 2] No such file or directory:
'/private/var/folders/_x/n59vb1b54pl96lvldz2lr_v40000gn/T/spark-37d8ecbc-9ac9-4aa2-be23-12823f4cd1ed/pyspark-1e3d5904-a5b6-4222-a146-91bfdb4a33a7/tmp8XMhgG'
{code}
Here I attach my code:
{code}
import codecs
from pyspark import SparkContext, SparkConf
from operator import add
import operator
from pyspark.storagelevel import StorageLevel
def combine_dict(a,b):
a.update(b)
return a
conf = SparkConf()
sc = SparkContext(appName = "tag")
al_tag_dict = sc.textFile('albumtag.txt').map(lambda x:
x.split(',')).map(lambda x: {x[0]: x[1:]}).reduce(lambda a, b:
combine_dict(a,b))
result = sc.textFile('uidAlbumscore.txt')\
.map(lambda x: x.split(','))\
.filter(lambda x: x[1] in al_tag_dict.keys())\
.map(lambda x: (x[0], al_tag_dict[x[1]], float(x[2])))\
.map(lambda x: map(lambda a: ((x[0], a), x[2]), x[1]))\
.flatMap(lambda x: x)\
.map(lambda x: (str(x[0][0]), x[1]))\
.reduceByKey(add)\
# .map(lambda x: x[0][0]+','+x[0][1]+','+str(x[1])+'\n')\
# .reduce(add)
#codecs.open('tag_score.txt','w','utf-8').write(result)
print result.first()
{code}
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