[
https://issues.apache.org/jira/browse/SPARK-16802?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Sylvain Zimmer updated SPARK-16802:
-----------------------------------
Description:
Hello!
This is a little similar to
[SPARK-16740|https://issues.apache.org/jira/browse/SPARK-16740] (should I have
reopened it?).
I would recommend to give another full review to {{HashedRelation.scala}},
particularly the new {{LongToUnsafeRowMap}} code. I've had a few other errors
that I haven't managed to reproduce so far, as well as what I suspect could be
memory leaks (I have a query in a loop OOMing after a few iterations despite
not caching its results).
Here is the script to reproduce the ArrayIndexOutOfBoundsException on the
current 2.0 branch:
{code}
import os
import random
from pyspark import SparkContext
from pyspark.sql import types as SparkTypes
from pyspark.sql import SQLContext
sc = SparkContext()
sqlc = SQLContext(sc)
schema1 = SparkTypes.StructType([
SparkTypes.StructField("id1", SparkTypes.LongType(), nullable=True),
# SparkTypes.StructField("weight1", SparkTypes.FloatType(), nullable=True)
])
schema2 = SparkTypes.StructType([
SparkTypes.StructField("id2", SparkTypes.LongType(), nullable=True),
# SparkTypes.StructField("weight2", SparkTypes.LongType(), nullable=True)
])
def randlong():
return random.randint(-9223372036854775808, 9223372036854775807)
while True:
l1, l2 = randlong(), randlong()
# Sample values that crash:
# l1, l2 = 4661454128115150227, -5543241376386463808
print "Testing with %s, %s" % (l1, l2)
data1 = [(l1, ), (l2, )]
data2 = [(l1, )]
df1 = sqlc.createDataFrame(sc.parallelize(data1), schema1)
df2 = sqlc.createDataFrame(sc.parallelize(data2), schema2)
crash = True
if crash:
os.system("rm -rf /tmp/sparkbug")
df1.write.parquet("/tmp/sparkbug/vertex")
df2.write.parquet("/tmp/sparkbug/edge")
df1 = sqlc.read.load("/tmp/sparkbug/vertex")
df2 = sqlc.read.load("/tmp/sparkbug/edge")
sqlc.registerDataFrameAsTable(df1, "df1")
sqlc.registerDataFrameAsTable(df2, "df2")
result_df = sqlc.sql("""
SELECT
df1.id1
FROM df1
LEFT OUTER JOIN df2 ON df1.id1 = df2.id2
""")
print result_df.collect()
{code}
{code}
java.lang.ArrayIndexOutOfBoundsException: 1728150825
at
org.apache.spark.sql.execution.joins.LongToUnsafeRowMap.getValue(HashedRelation.scala:463)
at
org.apache.spark.sql.execution.joins.LongHashedRelation.getValue(HashedRelation.scala:762)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIterator.processNext(Unknown
Source)
at
org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
at
org.apache.spark.sql.execution.WholeStageCodegenExec$$anonfun$8$$anon$1.hasNext(WholeStageCodegenExec.scala:370)
at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.hasNext(SerDeUtil.scala:117)
at scala.collection.Iterator$class.foreach(Iterator.scala:893)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.foreach(SerDeUtil.scala:112)
at
scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:59)
at
scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:104)
at
scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:48)
at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:310)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.to(SerDeUtil.scala:112)
at
scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:302)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.toBuffer(SerDeUtil.scala:112)
at
scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:289)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.toArray(SerDeUtil.scala:112)
at
org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$13.apply(RDD.scala:899)
at
org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$13.apply(RDD.scala:899)
at
org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1898)
at
org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1898)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:70)
at org.apache.spark.scheduler.Task.run(Task.scala:85)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:274)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
16/07/29 20:19:00 WARN TaskSetManager: Lost task 0.0 in stage 17.0 (TID 50,
localhost): java.lang.ArrayIndexOutOfBoundsException: 1728150825
at
org.apache.spark.sql.execution.joins.LongToUnsafeRowMap.getValue(HashedRelation.scala:463)
at
org.apache.spark.sql.execution.joins.LongHashedRelation.getValue(HashedRelation.scala:762)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIterator.processNext(Unknown
Source)
at
org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
at
org.apache.spark.sql.execution.WholeStageCodegenExec$$anonfun$8$$anon$1.hasNext(WholeStageCodegenExec.scala:370)
at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.hasNext(SerDeUtil.scala:117)
at scala.collection.Iterator$class.foreach(Iterator.scala:893)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.foreach(SerDeUtil.scala:112)
at
scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:59)
at
scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:104)
at
scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:48)
at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:310)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.to(SerDeUtil.scala:112)
at
scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:302)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.toBuffer(SerDeUtil.scala:112)
at
scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:289)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.toArray(SerDeUtil.scala:112)
at
org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$13.apply(RDD.scala:899)
at
org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$13.apply(RDD.scala:899)
at
org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1898)
at
org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1898)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:70)
at org.apache.spark.scheduler.Task.run(Task.scala:85)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:274)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
{code}
was:
Hello!
This is a little similar to
[SPARK-16740|https://issues.apache.org/jira/browse/SPARK-16740] (should I have
reopened it?).
I would recommend to give another full review to {{HashedRelation.scala}},
particularly the new {{LongToUnsafeRowMap}} code. I've had a few other errors
that I haven't managed to reproduce so far, as well as what I suspect could be
memory leaks (I have a query in a loop OOMing after a few iterations despite
not caching its results).
Here is the script to reproduce the ArrayIndexOutOfBoundsException on the
current 2.0 branch:
{{code}}
import os
import random
from pyspark import SparkContext
from pyspark.sql import types as SparkTypes
from pyspark.sql import SQLContext
sc = SparkContext()
sqlc = SQLContext(sc)
schema1 = SparkTypes.StructType([
SparkTypes.StructField("id1", SparkTypes.LongType(), nullable=True),
# SparkTypes.StructField("weight1", SparkTypes.FloatType(), nullable=True)
])
schema2 = SparkTypes.StructType([
SparkTypes.StructField("id2", SparkTypes.LongType(), nullable=True),
# SparkTypes.StructField("weight2", SparkTypes.LongType(), nullable=True)
])
def randlong():
return random.randint(-9223372036854775808, 9223372036854775807)
while True:
l1, l2 = randlong(), randlong()
# Sample values that crash:
# l1, l2 = 4661454128115150227, -5543241376386463808
print "Testing with %s, %s" % (l1, l2)
data1 = [(l1, ), (l2, )]
data2 = [(l1, )]
df1 = sqlc.createDataFrame(sc.parallelize(data1), schema1)
df2 = sqlc.createDataFrame(sc.parallelize(data2), schema2)
crash = True
if crash:
os.system("rm -rf /tmp/sparkbug")
df1.write.parquet("/tmp/sparkbug/vertex")
df2.write.parquet("/tmp/sparkbug/edge")
df1 = sqlc.read.load("/tmp/sparkbug/vertex")
df2 = sqlc.read.load("/tmp/sparkbug/edge")
sqlc.registerDataFrameAsTable(df1, "df1")
sqlc.registerDataFrameAsTable(df2, "df2")
result_df = sqlc.sql("""
SELECT
df1.id1
FROM df1
LEFT OUTER JOIN df2 ON df1.id1 = df2.id2
""")
print result_df.collect()
{{code}}
{{code}}
java.lang.ArrayIndexOutOfBoundsException: 1728150825
at
org.apache.spark.sql.execution.joins.LongToUnsafeRowMap.getValue(HashedRelation.scala:463)
at
org.apache.spark.sql.execution.joins.LongHashedRelation.getValue(HashedRelation.scala:762)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIterator.processNext(Unknown
Source)
at
org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
at
org.apache.spark.sql.execution.WholeStageCodegenExec$$anonfun$8$$anon$1.hasNext(WholeStageCodegenExec.scala:370)
at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.hasNext(SerDeUtil.scala:117)
at scala.collection.Iterator$class.foreach(Iterator.scala:893)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.foreach(SerDeUtil.scala:112)
at
scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:59)
at
scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:104)
at
scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:48)
at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:310)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.to(SerDeUtil.scala:112)
at
scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:302)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.toBuffer(SerDeUtil.scala:112)
at
scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:289)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.toArray(SerDeUtil.scala:112)
at
org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$13.apply(RDD.scala:899)
at
org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$13.apply(RDD.scala:899)
at
org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1898)
at
org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1898)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:70)
at org.apache.spark.scheduler.Task.run(Task.scala:85)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:274)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
16/07/29 20:19:00 WARN TaskSetManager: Lost task 0.0 in stage 17.0 (TID 50,
localhost): java.lang.ArrayIndexOutOfBoundsException: 1728150825
at
org.apache.spark.sql.execution.joins.LongToUnsafeRowMap.getValue(HashedRelation.scala:463)
at
org.apache.spark.sql.execution.joins.LongHashedRelation.getValue(HashedRelation.scala:762)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIterator.processNext(Unknown
Source)
at
org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
at
org.apache.spark.sql.execution.WholeStageCodegenExec$$anonfun$8$$anon$1.hasNext(WholeStageCodegenExec.scala:370)
at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.hasNext(SerDeUtil.scala:117)
at scala.collection.Iterator$class.foreach(Iterator.scala:893)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.foreach(SerDeUtil.scala:112)
at
scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:59)
at
scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:104)
at
scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:48)
at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:310)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.to(SerDeUtil.scala:112)
at
scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:302)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.toBuffer(SerDeUtil.scala:112)
at
scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:289)
at
org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.toArray(SerDeUtil.scala:112)
at
org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$13.apply(RDD.scala:899)
at
org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$13.apply(RDD.scala:899)
at
org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1898)
at
org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1898)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:70)
at org.apache.spark.scheduler.Task.run(Task.scala:85)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:274)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
{{code}}
> joins.LongToUnsafeRowMap crashes with ArrayIndexOutOfBoundsException
> --------------------------------------------------------------------
>
> Key: SPARK-16802
> URL: https://issues.apache.org/jira/browse/SPARK-16802
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.0, 2.0.1
> Reporter: Sylvain Zimmer
>
> Hello!
> This is a little similar to
> [SPARK-16740|https://issues.apache.org/jira/browse/SPARK-16740] (should I
> have reopened it?).
> I would recommend to give another full review to {{HashedRelation.scala}},
> particularly the new {{LongToUnsafeRowMap}} code. I've had a few other errors
> that I haven't managed to reproduce so far, as well as what I suspect could
> be memory leaks (I have a query in a loop OOMing after a few iterations
> despite not caching its results).
> Here is the script to reproduce the ArrayIndexOutOfBoundsException on the
> current 2.0 branch:
> {code}
> import os
> import random
> from pyspark import SparkContext
> from pyspark.sql import types as SparkTypes
> from pyspark.sql import SQLContext
> sc = SparkContext()
> sqlc = SQLContext(sc)
> schema1 = SparkTypes.StructType([
> SparkTypes.StructField("id1", SparkTypes.LongType(), nullable=True),
> # SparkTypes.StructField("weight1", SparkTypes.FloatType(), nullable=True)
> ])
> schema2 = SparkTypes.StructType([
> SparkTypes.StructField("id2", SparkTypes.LongType(), nullable=True),
> # SparkTypes.StructField("weight2", SparkTypes.LongType(), nullable=True)
> ])
> def randlong():
> return random.randint(-9223372036854775808, 9223372036854775807)
> while True:
> l1, l2 = randlong(), randlong()
> # Sample values that crash:
> # l1, l2 = 4661454128115150227, -5543241376386463808
> print "Testing with %s, %s" % (l1, l2)
> data1 = [(l1, ), (l2, )]
> data2 = [(l1, )]
> df1 = sqlc.createDataFrame(sc.parallelize(data1), schema1)
> df2 = sqlc.createDataFrame(sc.parallelize(data2), schema2)
> crash = True
> if crash:
> os.system("rm -rf /tmp/sparkbug")
> df1.write.parquet("/tmp/sparkbug/vertex")
> df2.write.parquet("/tmp/sparkbug/edge")
> df1 = sqlc.read.load("/tmp/sparkbug/vertex")
> df2 = sqlc.read.load("/tmp/sparkbug/edge")
> sqlc.registerDataFrameAsTable(df1, "df1")
> sqlc.registerDataFrameAsTable(df2, "df2")
> result_df = sqlc.sql("""
> SELECT
> df1.id1
> FROM df1
> LEFT OUTER JOIN df2 ON df1.id1 = df2.id2
> """)
> print result_df.collect()
> {code}
> {code}
> java.lang.ArrayIndexOutOfBoundsException: 1728150825
> at
> org.apache.spark.sql.execution.joins.LongToUnsafeRowMap.getValue(HashedRelation.scala:463)
> at
> org.apache.spark.sql.execution.joins.LongHashedRelation.getValue(HashedRelation.scala:762)
> at
> org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIterator.processNext(Unknown
> Source)
> at
> org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
> at
> org.apache.spark.sql.execution.WholeStageCodegenExec$$anonfun$8$$anon$1.hasNext(WholeStageCodegenExec.scala:370)
> at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)
> at
> org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.hasNext(SerDeUtil.scala:117)
> at scala.collection.Iterator$class.foreach(Iterator.scala:893)
> at
> org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.foreach(SerDeUtil.scala:112)
> at
> scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:59)
> at
> scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:104)
> at
> scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:48)
> at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:310)
> at
> org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.to(SerDeUtil.scala:112)
> at
> scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:302)
> at
> org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.toBuffer(SerDeUtil.scala:112)
> at
> scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:289)
> at
> org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.toArray(SerDeUtil.scala:112)
> at
> org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$13.apply(RDD.scala:899)
> at
> org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$13.apply(RDD.scala:899)
> at
> org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1898)
> at
> org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1898)
> at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:70)
> at org.apache.spark.scheduler.Task.run(Task.scala:85)
> at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:274)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> 16/07/29 20:19:00 WARN TaskSetManager: Lost task 0.0 in stage 17.0 (TID 50,
> localhost): java.lang.ArrayIndexOutOfBoundsException: 1728150825
> at
> org.apache.spark.sql.execution.joins.LongToUnsafeRowMap.getValue(HashedRelation.scala:463)
> at
> org.apache.spark.sql.execution.joins.LongHashedRelation.getValue(HashedRelation.scala:762)
> at
> org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIterator.processNext(Unknown
> Source)
> at
> org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
> at
> org.apache.spark.sql.execution.WholeStageCodegenExec$$anonfun$8$$anon$1.hasNext(WholeStageCodegenExec.scala:370)
> at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)
> at
> org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.hasNext(SerDeUtil.scala:117)
> at scala.collection.Iterator$class.foreach(Iterator.scala:893)
> at
> org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.foreach(SerDeUtil.scala:112)
> at
> scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:59)
> at
> scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:104)
> at
> scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:48)
> at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:310)
> at
> org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.to(SerDeUtil.scala:112)
> at
> scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:302)
> at
> org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.toBuffer(SerDeUtil.scala:112)
> at
> scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:289)
> at
> org.apache.spark.api.python.SerDeUtil$AutoBatchedPickler.toArray(SerDeUtil.scala:112)
> at
> org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$13.apply(RDD.scala:899)
> at
> org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$13.apply(RDD.scala:899)
> at
> org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1898)
> at
> org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1898)
> at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:70)
> at org.apache.spark.scheduler.Task.run(Task.scala:85)
> at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:274)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> {code}
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