Spark eventlog 、Event、SparkListener

SparkListenerSQLExecutionStart
case class SparkListenerSQLExecutionStart(
    executionId: Long,
    // if the execution is a root, then rootExecutionId == executionId
    // if the event is parsed from the event log that generated by Spark not support
    // nested execution, then rootExecutionId = None
    @JsonDeserialize(c

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