在Scala中,可以使用YARN的Java API来从YARN客户端获取纱线(YARN)作业的状态。下面是一个示例代码,展示了如何使用Scala编写一个函数来获取YARN作业的状态:
import org.apache.hadoop.conf.Configuration
import org.apache.hadoop.yarn.api.records.{ApplicationId, YarnApplicationState}
import org.apache.hadoop.yarn.client.api.YarnClient
import org.apache.hadoop.yarn.util.ConverterUtils
def getYarnJobStatus(applicationIdStr: String): String = {
val conf = new Configuration()
val yarnClient = YarnClient.createYarnClient()
yarnClient.init(conf)
yarnClient.start()
val applicationId = ConverterUtils.toApplicationId(applicationIdStr)
val applicationReport = yarnClient.getApplicationReport(applicationId)
val state = applicationReport.getYarnApplicationState
val status = state match {
case YarnApplicationState.NEW => "New"
case YarnApplicationState.NEW_SAVING => "New Saving"
case YarnApplicationState.SUBMITTED => "Submitted"
case YarnApplicationState.ACCEPTED => "Accepted"
case YarnApplicationState.RUNNING => "Running"
case YarnApplicationState.FINISHED => "Finished"
case YarnApplicationState.FAILED => "Failed"
case YarnApplicationState.KILLED => "Killed"
case _ => "Unknown"
}
yarnClient.stop()
status
}
这个函数接受一个YARN作业的应用程序ID作为参数,并返回作业的状态。它使用YARN的Java API来初始化YARN客户端,获取应用程序报告,并从报告中提取作业的状态。最后,它停止YARN客户端并返回作业状态。
这个函数可以在Scala应用程序中使用,例如:
val applicationId = "application_1234567890_1234"
val jobStatus = getYarnJobStatus(applicationId)
println(s"YARN job status: $jobStatus")
请注意,这个示例代码假设你已经正确配置了Hadoop和YARN,并且在Scala项目中包含了相关的依赖。如果你需要更详细的信息,可以参考腾讯云的相关文档和API文档来了解如何在腾讯云上使用YARN。
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