Structured Streaming using PySpark and Kafka, Py4JJavaError: An error occurred while calling o70.awaitTermination

Question

I tried to consume from Kafka using Spark, more specifically PySpark and Structured Streaming.

import os
import time
import time

from ast import literal_eval
from pyspark.sql.types import *
from pyspark.sql.functions import from_json, col, struct, explode
from pyspark.sql import SparkSession
os.environ['PYSPARK_SUBMIT_ARGS'] = '--packages org.apache.spark:spark-sql-kafka-0-10_2.11:2.3.0 pyspark-shell'

spark = SparkSession \
    .builder \
    .appName("Structured Streaming") \
    .getOrCreate()

    requests = spark \
  .readStream \
  .format("kafka") \
  .option("kafka.bootstrap.servers", "ip-ec2:9092") \
  .option("subscribe", "ssp.requests") \
  .option("startingOffsets", "earliest") \
  .load()

requests.printSchema()

# root  |-- key: binary (nullable = true)  |-- value: binary (nullable =
# true)  |-- topic: string (nullable = true)  |-- partition: integer
# (nullable = true)  |-- offset: long (nullable = true)  |-- timestamp:
# timestamp (nullable = true)  |-- timestampType: integer (nullable =
# true)

When I ran the next lines of code

rawQuery = requests \
        .selectExpr("topic", "CAST(key AS STRING)", "CAST(value AS STRING)") \
        .writeStream.trigger(processingTime="5 seconds") \
        .format("parquet") \
        .option("checkpointLocation", "/home/user/folder/applicationHistory") \
        .option("path", "/home/user/folder") \
        .start()
rawQuery.awaitTermination()    

Py4JJavaError Traceback (most recent call last) /opt/conda/lib/python3.6/site-packages/pyspark/sql/utils.py in deco(*a, **kw) 62 try: ---> 63 return f(*a, **kw) 64 except py4j.protocol.Py4JJavaError as e:

/opt/conda/lib/python3.6/site-packages/py4j/protocol.py in get_return_value(answer, gateway_client, target_id, name) 319 "An error occurred while calling {0}{1}{2}.\n". --> 320 format(target_id, ".", name), value) 321 else:

Py4JJavaError: An error occurred while calling o70.awaitTermination. : org.apache.spark.sql.streaming.StreamingQueryException: Job aborted. === Streaming Query === Identifier: [id = c2b48840-5ba4-416e-a192-dcae94007856, runId = 4afcca20-00cd-4187-a70b-1b742f1f5c0d] Current Committed Offsets: {} Current Available Offsets: {KafkaSource[Subscribe[ssp.requests]]:

I can't understand the reason of this error

Py4JJavaError: An error occurred while calling o70.awaitTermination

Answer 1

I just replaced the line rawQuery.awaitTermination() by

print(rawQuery.status)
time.sleep(60)
print(rawQuery.status)
rawQuery.stop()

and it works.