Yarn不接受任务的问题

现象描述

提交Spark任务时，报如下错误。

Exception in thread "main" org.apache.spark.SparkException: Yarn application already ended,might be killed or not able to launch application master.
at org.apache.spark.scheduler.cluster.YarnClientSchedulerBackend.waitForApp(YarnClientSchedulerBackend.scala:111)
at org.apache.spark.scheduler.cluster.YarnClientSchedulerBackend.start(YarnClientSchedulerBackend.scala:87)
at org.apache.spark.scheduler.TaskSchedulerImpl.start(TaskSchedulerImpl.scala:141)
at org.apache.spark.SparkContext.<init>(SparkContext.scala:323)
at org.apache.spark.examples.SparkPi$.main(SparkPi.scala:28)
at org.apache.spark.examples.SparkPi.main(SparkPi.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.spark.deploy.SparkSubmit$.launch(SparkSubmit.scala:332)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:79)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)

可能原因

Yarn出现问题，不能支持Spark on Yarn。

定位思路

无。

处理步骤

建议观察Application Master的Web UI报错信息，并联系Yarn相关人员定位。