How to Resolve TypeError: 'JavaPackage' Object Is Not Callable in AWS Glue with PySpark

What does the TypeError: 'JavaPackage' object is not callable mean in AWS Glue with PySpark?

# Example of an erroneous PySpark code leading to the error
from pyspark.sql import SparkSession

# Attempt to access a Java package
spark = SparkSession.builder.appName('example').getOrCreate()
my_package = spark._jvm.org.example.MyJavaClass()

The error 'TypeError: 'JavaPackage' object is not callable' occurs in AWS Glue when you attempt to invoke a method on a Java class that has not been properly referenced or instantiated in a PySpark context. This typically happens when the PySpark job cannot locate the specified Java class or when there is a mismatch in how the class is accessed.

# Correct way to access a Java class in AWS Glue
my_package = spark._jvm.org.example.MyJavaClass
my_instance = my_package()  # Invoke constructor properly

Causes

• The Java class path is not included in the AWS Glue job configuration.
• Incorrect usage of the Java object in PySpark.
• The Java class or package does not exist or cannot be found in the AWS Glue environment.

Solutions

• Ensure that the Java class or package is properly referenced in the AWS Glue job configuration.
• Check and correct the syntax in which the Java class is accessed in PySpark.
• Verify that the required JAR files containing the Java classes are uploaded to the AWS Glue environment or correctly referenced.

Mistake: Calling a JavaPackage directly instead of referencing its class or constructor.

Solution: Use the correct syntax to instantiate the Java class by referencing it appropriately.

Mistake: Not adding necessary JAR files to the Glue job.

Solution: Make sure to include all required JAR files in the AWS Glue job configurations.