python - Pandas scalar UDF failing, IllegalArgumentException

Question

First off, I apologize if my issue is simple. I did spend a lot of time researching it.

I am trying to set up a scalar Pandas UDF in a PySpark script as described here.

Here is my code:

from pyspark import SparkContext
from pyspark.sql import functions as F
from pyspark.sql.types import *
from pyspark.sql import SQLContext
sc.install_pypi_package("pandas")
import pandas as pd
sc.install_pypi_package("PyArrow")

df = spark.createDataFrame(
    [("a", 1, 0), ("a", -1, 42), ("b", 3, -1), ("b", 10, -2)],
    ("key", "value1", "value2")
)

df.show()

@F.pandas_udf("double", F.PandasUDFType.SCALAR)
def pandas_plus_one(v):
    return pd.Series(v + 1)

df.select(pandas_plus_one(df.value1)).show()
# Also fails
#df.select(pandas_plus_one(df["value1"])).show()
#df.select(pandas_plus_one("value1")).show()
#df.select(pandas_plus_one(F.col("value1"))).show()

The script fails at the last statement:

An error occurred while calling o209.showString. : org.apache.spark.SparkException: Job aborted due to stage failure: Task 2 in stage 8.0 failed 4 times, most recent failure: Lost task 2.3 in stage 8.0 (TID 30, ip-10-160-2-53.ec2.internal, executor 3): java.lang.IllegalArgumentException at java.nio.ByteBuffer.allocate(ByteBuffer.java:334) at org.apache.arrow.vector.ipc.message.MessageSerializer.readMessage(MessageSerializer.java:543) at org.apache.arrow.vector.ipc.message.MessageChannelReader.readNext(MessageChannelReader.java:58) at org.apache.arrow.vector.ipc.ArrowStreamReader.readSchema(ArrowStreamReader.java:132) at org.apache.arrow.vector.ipc.ArrowReader.initialize(ArrowReader.java:181) at org.apache.arrow.vector.ipc.ArrowReader.ensureInitialized(ArrowReader.java:172) at org.apache.arrow.vector.ipc.ArrowReader.getVectorSchemaRoot(ArrowReader.java:65) at org.apache.spark.sql.execution.python.ArrowPythonRunner$$anon$1.read(ArrowPythonRunner.scala:162) at org.apache.spark.sql.execution.python.ArrowPythonRunner$$anon$1.read(ArrowPythonRunner.scala:122) at org.apache.spark.api.python.BasePythonRunner$ReaderIterator.hasNext(PythonRunner.scala:410) ...

What am I missing here? I am just following the manual. Thanks for your help

Answer 1

Pyarrow rolled out a new version 0.15 on october 5,2019 which causes pandas Udf to throw error. Spark needs to upgrade to be compatible with this(which might take some time). You can follow the progress here https://issues.apache.org/jira/projects/SPARK/issues/SPARK-29367?filter=allissues

Solution:

1. You need to install Pyarrow 0.14.1 or lower. < sc.install_pypi_package("pyarrow==0.14.1") > (or)
2. Set the environment variable ARROW_PRE_0_15_IPC_FORMAT=1 from where you are using Python