Top "Py4j" questions

Py4J enables Python programs to dynamically access arbitrary Java objects

How to add third-party Java JAR files for use in PySpark

I have some third-party database client libraries in Java. I want to access them through java_gateway.py E.g.: …

python apache-spark pyspark py4j
Why can't PySpark find py4j.java_gateway?

I installed Spark, ran the sbt assembly, and can open bin/pyspark with no problem. However, I am running into …

python python-2.7 apache-spark ipython py4j
py4j.protocol.Py4JJavaError occurred while calling z:org.apache.spark.api.python.PythonRDD.collectAndServe

I installed apache-spark and pyspark on my machine (Ubuntu), and in Pycharm, I also updated the environment variables (e.g. …

python-3.x apache-spark pyspark pycharm py4j
Py4JJavaError: An error occurred while calling

I am new to PySpark. I have been writing my code with a test sample. Once I run the code …

python pyspark pyspark-sql py4j
findspark.init() IndexError: list index out of range error

When running the following in a Python 3.5 Jupyter environment I get the error below. Any ideas on what is causing …

python apache-spark pyspark py4j
Pyspark py4j PickleException: "expected zero arguments for construction of ClassDict"

This question is directed towards persons familiar with py4j - and can help to resolve a pickling error. I …

python apache-spark pyspark py4j
JavaPackage object is not callable error: Pyspark

Operations like dataframe.show() , sQLContext.read.json works fine , but most functions gives "JavaPackage object is not callable error" . eg : …

apache-spark pyspark python-3.4 apache-zeppelin py4j
Simplest example with py4J

I installed py4J using pip on my conda virtual environment in Python. I wrote a super simple example AdditionApplication.…

java python py4j
ERROR: Unable to find py4j, your SPARK_HOME may not be configured correctly

I'm unable to run below import in Jupyter notebook. findspark.init('home/ubuntu/spark-3.0.0-bin-hadoop3.2') Getting this following error: …

python ubuntu pyspark py4j
Running custom Java class in PySpark

I'm trying to run a custom HDFS reader class in PySpark. This class is written in Java and I need …

java python apache-spark pyspark py4j