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Posted to issues@spark.apache.org by "Julian Fleischer (Jira)" <ji...@apache.org> on 2021/02/15 02:07:00 UTC
[jira] [Commented] (SPARK-34438) Python Driver is not correctly
detected using presigned URLs
[ https://issues.apache.org/jira/browse/SPARK-34438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17284531#comment-17284531 ]
Julian Fleischer commented on SPARK-34438:
------------------------------------------
I am proposing a patch here: https://github.com/apache/spark/pull/31565
> Python Driver is not correctly detected using presigned URLs
> ------------------------------------------------------------
>
> Key: SPARK-34438
> URL: https://issues.apache.org/jira/browse/SPARK-34438
> Project: Spark
> Issue Type: Bug
> Components: Spark Submit
> Affects Versions: 3.0.0, 3.0.1, 3.0.2, 3.1.0
> Reporter: Julian Fleischer
> Priority: Minor
>
> In AWS one can generate so-called presigned URLs. spark-submit accepts URLs for the driver program, e.g. {{http://my-web-server/driver.py}}. Now a presigned URL has a query fragment {{http://my-web-server/driver.py?signature}}.
> Now the check for whether the given URL is a python driver simply checks whether it ends in {{.py}} – which the presigned URL does not, as it ends in {{signature}}.
> The relevant check is in {{SparkSubmit.scala}}, Line 1051 (commit tagged {{v3.0.1}}):
> [https://github.com/apache/spark/blob/v3.0.1/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala#L1051]
> Here is a more realistic example URL:
> {{https://bucket-name.s3.us-east-1.amazonaws.com/driver.py?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIATBNPKWPCNUMWMLUR%2F20210214%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20210214T062047Z&X-Amz-Expires=172800&X-Amz-SignedHeaders=host&X-Amz-Signature=49ef39b6bb7090001af9312692788892551916a6ac0ff6c961ce52efb9acc235}}
> A fix could be to parse the the given path as a {{java.net.URI}} and look for the pathname to end in {{.py}} (as opposed to the whole thing).
> To circumvent this issue I am currently appending a fragment to the query which makes it end in {{.py}}, i.e. {{http://my-web-server/driver.py?signature#.py}} which does work.
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