工作原理图
源码分析：
1、)
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launchedTask = true
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}
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} catch {
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case e: TaskNotSerializableException =>
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logError(s"Resource offer failed, task set ${taskSet.name} was not serializable")
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// Do not offer resources for this task, but don't throw an error to allow other
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// task sets to be submitted.
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return launchedTask
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}
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}
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}
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return launchedTask
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}