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https://issues.apache.org/jira/browse/SPARK-33611?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gengliang Wang resolved SPARK-33611.
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Fix Version/s: 3.0.2
3.1.0
Resolution: Fixed
Issue resolved by pull request 30552
[https://github.com/apache/spark/pull/30552]
> Decode Query parameters of the redirect URL for reverse proxy
> -------------------------------------------------------------
>
> Key: SPARK-33611
> URL: https://issues.apache.org/jira/browse/SPARK-33611
> Project: Spark
> Issue Type: Bug
> Components: Web UI
> Affects Versions: 3.0.0, 3.1.0
> Reporter: Gengliang Wang
> Assignee: Gengliang Wang
> Priority: Major
> Fix For: 3.1.0, 3.0.2
>
>
> When running Spark with reverse proxy enabled, the query parameter of the
> request URL can be encoded twice: one from the browser and another one from
> the reverse proxy(e.g. Nginx).
> In Spark's stage page, the URL of "/taskTable" contains query parameter
> order[0][dir]. After encoding twice, the query parameter becomes
> `order%255B0%255D%255Bdir%255D` and it will be decoded as
> `order%5B0%5D%5Bdir%5D` instead of `order[0][dir]`. As a result, there will
> be NullPointerException from
> https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/status/api/v1/StagesResource.scala#L176
> Other than that, the other parameter may not work as expected after encoded
> twice.
> We should decode the query parameters and fix the problem
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