[jira] [Created] (SPARK-12399) Display correct error message when accessing REST API with an unknown app Id

["Carson Wang (JIRA)" <ji...@apache.org>]

Carson Wang created SPARK-12399:
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             Summary: Display correct error message when accessing REST API with an unknown app Id
                 Key: SPARK-12399
                 URL: https://issues.apache.org/jira/browse/SPARK-12399
             Project: Spark
          Issue Type: Bug
          Components: Web UI
    Affects Versions: 1.5.2
            Reporter: Carson Wang
            Priority: Minor


I got an exception when accessing the below REST API with an unknown application Id.
/api/v1/applications/xxx/jobs

Instead of an exception, I expect an error message "no such app: xxx" which is a similar error message when I access "/api/v1/applications/xxx"

{code}
org.spark-project.guava.util.concurrent.UncheckedExecutionException: java.util.NoSuchElementException: no app with key xxx
	at org.spark-project.guava.cache.LocalCache$Segment.get(LocalCache.java:2263)
	at org.spark-project.guava.cache.LocalCache.get(LocalCache.java:4000)
	at org.spark-project.guava.cache.LocalCache.getOrLoad(LocalCache.java:4004)
	at org.spark-project.guava.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4874)
	at org.apache.spark.deploy.history.HistoryServer.getSparkUI(HistoryServer.scala:116)
	at org.apache.spark.status.api.v1.UIRoot$class.withSparkUI(ApiRootResource.scala:226)
	at org.apache.spark.deploy.history.HistoryServer.withSparkUI(HistoryServer.scala:46)
	at org.apache.spark.status.api.v1.ApiRootResource.getJobs(ApiRootResource.scala:66)
{code}



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