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https://issues.apache.org/jira/browse/SPARK-27927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16884631#comment-16884631
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Edwin Biemond commented on SPARK-27927:
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This is what I see now,
driver starts up with an executor. python executes fines and the process is
removed. Normally the driver detects this and cleans itself and executor. Now
driver does not detect this because sparkContext is still there.
I get the same normal behaviour again ( <= 2.4.0) when add
spark.sparkContext.stop() to the python script
So this
spark = SparkSession.builder.appName('hello_world').getOrCreate()
Start something, > 2.4.0 and drv still thinks something is running.
> driver pod hangs with pyspark 2.4.3 and master on kubenetes
> -----------------------------------------------------------
>
> Key: SPARK-27927
> URL: https://issues.apache.org/jira/browse/SPARK-27927
> Project: Spark
> Issue Type: Bug
> Components: Kubernetes, PySpark
> Affects Versions: 3.0.0, 2.4.3
> Environment: k8s 1.11.9
> spark 2.4.3 and master branch.
> Reporter: Edwin Biemond
> Priority: Major
> Attachments: driver_threads.log, executor_threads.log
>
>
> When we run a simple pyspark on spark 2.4.3 or 3.0.0 the driver pods hangs
> and never calls the shutdown hook.
> {code:java}
> #!/usr/bin/env python
> from __future__ import print_function
> import os
> import os.path
> import sys
> # Are we really in Spark?
> from pyspark.sql import SparkSession
> spark = SparkSession.builder.appName('hello_world').getOrCreate()
> print('Our Spark version is {}'.format(spark.version))
> print('Spark context information: {} parallelism={} python version={}'.format(
> str(spark.sparkContext),
> spark.sparkContext.defaultParallelism,
> spark.sparkContext.pythonVer
> ))
> {code}
> When we run this on kubernetes the driver and executer are just hanging. We
> see the output of this python script.
> {noformat}
> bash-4.2# cat stdout.log
> Our Spark version is 2.4.3
> Spark context information: <SparkContext
> master=k8s://https://kubernetes.default.svc:443 appName=hello_world>
> parallelism=2 python version=3.6{noformat}
> What works
> * a simple python with a print works fine on 2.4.3 and 3.0.0
> * same setup on 2.4.0
> * 2.4.3 spark-submit with the above pyspark
>
>
>
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