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https://issues.apache.org/jira/browse/SPARK-31941?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17130373#comment-17130373
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Kousuke Saruta commented on SPARK-31941:
----------------------------------------
Fixed in https://github.com/apache/spark/pull/28768
> Handling the exception in SparkUI for getSparkUser method
> ---------------------------------------------------------
>
> Key: SPARK-31941
> URL: https://issues.apache.org/jira/browse/SPARK-31941
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.4.6, 3.0.0, 3.1.0
> Reporter: Saurabh Chawla
> Assignee: Saurabh Chawla
> Priority: Minor
> Fix For: 3.0.1, 3.1.0, 2.4.7
>
>
> After SPARK-31632 SparkException is thrown from def applicationInfo(
> {code:java}
> def applicationInfo(): v1.ApplicationInfo = {
> try {
> // The ApplicationInfo may not be available when Spark is starting up.
>
> store.view(classOf[ApplicationInfoWrapper]).max(1).iterator().next().info
> } catch {
> case _: NoSuchElementException =>
> throw new SparkException("Failed to get the application information.
> " +
> "If you are starting up Spark, please wait a while until it's
> ready.")
> }
> }
> {code}
> Where as the caller for this method def getSparkUser in Spark UI is not
> handling SparkException in the catch
> {code:java}
> def getSparkUser: String = {
> try {
> Option(store.applicationInfo().attempts.head.sparkUser)
>
> .orElse(store.environmentInfo().systemProperties.toMap.get("user.name"))
> .getOrElse("<unknown>")
> } catch {
> case _: NoSuchElementException => "<unknown>"
> }
> }
> {code}
> So On using this method (getSparkUser )we can get the application erred out.
> So either we should thow
> {code:java}
> throw new NoSuchElementException("Failed to get the application information.
> " +
> "If you are starting up Spark, please wait a while until it's
> ready.")
> {code}
> or else add the scenario to catch spark exception in getSparkUser
> case _: SparkException => "<unknown>"
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