Flink连接MySQL报错，求解决方法

Question

问题遇到的现象和发生背景

使用flink测试连接flink时报错：处理流运算符时出错，
不知道是不是程序写错了还是mysql有问题

问题相关代码，请勿粘贴截图

package flink_scala.apitest.sinktest

import java.sql.{Connection, DriverManager, PreparedStatement}

import flink_scala.apitest.SensorReading
import org.apache.flink.configuration.Configuration
import org.apache.flink.streaming.api.functions.sink.{RichSinkFunction, SinkFunction}
import org.apache.flink.streaming.api.scala._

object JdbcSinkTest {
  def main(args: Array[String]): Unit = {
    // 定义流式处理环境
    val env = StreamExecutionEnvironment.getExecutionEnvironment
    // 0.读取数据
    val inputStream = env.readTextFile("C:\\Users\\86182\\IdeaProjects\\flink_scala\\src\\main\\resources\\sensor.txt")


    // 1.先转换成样例类类型（简单转换操作）
    val dataStream = inputStream
      .map( data =>{
        val arr = data.split(",")
        SensorReading(arr(0), arr(1).toLong, arr(2).toDouble)
      } )

    dataStream.addSink( new MyJdbcSinkFunc() )

    env.execute("Jdbc sink test")

  }
}

class MyJdbcSinkFunc() extends RichSinkFunction[SensorReading]{
  // 定义连接、预编译语句
  var conn: Connection = _
  var insertStmt: PreparedStatement = _
  var updateStmt: PreparedStatement = _

  override def open(parameters: Configuration): Unit = {
    conn = DriverManager.getConnection("jdbc:mysql://192.168.10.24:3306/test?useSSL=false", "root", "Password123$")
    insertStmt = conn.prepareStatement("insert into sensor_temp (id, temp) values (?, ?)")
    updateStmt = conn.prepareStatement("update sensor_temp set temp = ? where id = ?")
  }

  override def invoke(value: SensorReading, context: SinkFunction.Context[_]): Unit = {
    // 先执行更新操作，查到就更新
    updateStmt.setDouble(1, value.temperature)
    updateStmt.setString(2, value.id)
    updateStmt.execute()
    // 如果更新没有查到数据，那么就插入
    if( updateStmt.getUpdateCount == 0 ){
      insertStmt.setString(1, value.id)
      insertStmt.setDouble(2, value.temperature)
      insertStmt.execute()
    }
  }

  override def close(): Unit = {
    insertStmt.close()
    updateStmt.close()
    conn.close()
  }
}

运行结果及报错内容

我的解答思路和尝试过的方法

我想要达到的结果

Answer 1

这是空指针异常，发生在读取数据那里，仔细检查一下数据是否有问题，估计是数据格式出现了问题或者路径输出了问题导致没有读取到自己想要的数据,无法被获取到，所以报了空异常