Github user harishreedharan commented on a diff in the pull request: https://github.com/apache/spark/pull/6166#discussion_r30535101 --- Diff: core/src/main/scala/org/apache/spark/ui/exec/ExecutorsTab.scala --- @@ -73,6 +73,16 @@ class ExecutorsListener(storageStatusListener: StorageStatusListener) extends Sp uiData.finishReason = Some(executorRemoved.reason) } + override def onApplicationStart(applicationStart: SparkListenerApplicationStart): Unit = { + applicationStart.driverLogs.foreach { logs => + val storageStatus = storageStatusList.find { s => + s.blockManagerId.executorId == SparkContext.LEGACY_DRIVER_IDENTIFIER || + s.blockManagerId.executorId == SparkContext.DRIVER_IDENTIFIER + } + storageStatus.foreach { s => executorToLogUrls(s.blockManagerId.executorId) = logs.toMap } --- End diff -- The `JsonProtocol` returns `mutable.Map` while `executorToLogUrls` has value typed as `Predef.Map`. We can either call `toMap` here or in `JsonProtocol` as you can see here: https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala#L845
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