SparkQA commented on issue #25503: [SPARK-28702][SQL] Display useful error message (instead of NPE) for invalid Dataset operations URL: https://github.com/apache/spark/pull/25503#issuecomment-522852702 **[Test build #109385 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/109385/testReport)** for PR 25503 at commit [`adcae0e`](https://github.com/apache/spark/commit/adcae0e259114c9e94e80b4329c964e0dd666638).
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