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https://issues.apache.org/jira/browse/SPARK-5760?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14317760#comment-14317760
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Apache Spark commented on SPARK-5760:
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User 'andrewor14' has created a pull request for this issue:
https://github.com/apache/spark/pull/4557
> StandaloneRestClient/Server error behavior is incorrect
> -------------------------------------------------------
>
> Key: SPARK-5760
> URL: https://issues.apache.org/jira/browse/SPARK-5760
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.3.0
> Reporter: Andrew Or
> Assignee: Andrew Or
> Priority: Critical
>
> There are three main known issues:
> (1) Server would always send the JSON to the servlet's output stream.
> However, if the response code is not 200, the client reads from the error
> stream instead. The server must write to the correct stream depending on the
> response code.
> (2) If the server returns an empty response (no JSON), then both output and
> error streams are null at the client, leading to NPEs. This happens if the
> server throws an internal exception that it cannot recover from.
> (3) The default error handling servlet did not match the URL cases correctly,
> because there are empty strings in the list.
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