使用On Yarn提交Spark任务时，为啥一直显示Accepted？

# 具体遇到的问题
使用On Yarn提交Spark任务时，一直不断地显示Accepted，然后过了很久之后报如下错误，请问这是什么原因？又该怎么解决？
# 报错信息的截图

# 相关课程内容截图

# 尝试过的解决思路和结果

# 粘贴全部相关代码，切记添加代码注释（请勿截图）

​[root@BigData04 spark-3.0.1-bin-hadoop3.2]# bin/spark-submit --class org.apache.spark.examples.SparkPi --master yarn --deploy-mode cluster examples/jars/spark-examples_2.12-3.0.1.jar 2

2020-12-23 21:47:51,970 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

2020-12-23 21:47:52,089 INFO client.RMProxy: Connecting to ResourceManager at BigData01/192.168.93.128:8032

2020-12-23 21:47:52,479 INFO yarn.Client: Requesting a new application from cluster with 3 NodeManagers

2020-12-23 21:47:53,146 INFO conf.Configuration: resource-types.xml not found

2020-12-23 21:47:53,147 INFO resource.ResourceUtils: Unable to find 'resource-types.xml'.

2020-12-23 21:47:53,204 INFO yarn.Client: Verifying our application has not requested more than the maximum memory capability of the cluster (8192 MB per container)

2020-12-23 21:47:53,205 INFO yarn.Client: Will allocate AM container, with 1408 MB memory including 384 MB overhead

2020-12-23 21:47:53,205 INFO yarn.Client: Setting up container launch context for our AM

2020-12-23 21:47:53,206 INFO yarn.Client: Setting up the launch environment for our AM container

2020-12-23 21:47:53,219 INFO yarn.Client: Preparing resources for our AM container

2020-12-23 21:47:53,367 WARN yarn.Client: Neither spark.yarn.jars nor spark.yarn.archive is set, falling back to uploading libraries under SPARK_HOME.

2020-12-23 21:47:55,797 INFO yarn.Client: Uploading resource file:/tmp/spark-073dfd19-bf54-4ccf-9f93-9cfd7871e042/__spark_libs__6704468600548540756.zip -> hdfs://BigData01:9000/user/root/.sparkStaging/application_1608731015658_0001/__spark_libs__6704468600548540756.zip

2020-12-23 21:47:58,923 INFO yarn.Client: Uploading resource file:/data/software/spark-3.0.1-bin-hadoop3.2/examples/jars/spark-examples_2.12-3.0.1.jar -> hdfs://BigData01:9000/user/root/.sparkStaging/application_1608731015658_0001/spark-examples_2.12-3.0.1.jar

2020-12-23 21:47:59,274 INFO yarn.Client: Uploading resource file:/tmp/spark-073dfd19-bf54-4ccf-9f93-9cfd7871e042/__spark_conf__3726838920049808942.zip -> hdfs://BigData01:9000/user/root/.sparkStaging/application_1608731015658_0001/__spark_conf__.zip

2020-12-23 21:47:59,364 INFO spark.SecurityManager: Changing view acls to: root

2020-12-23 21:47:59,365 INFO spark.SecurityManager: Changing modify acls to: root

2020-12-23 21:47:59,365 INFO spark.SecurityManager: Changing view acls groups to: 

2020-12-23 21:47:59,366 INFO spark.SecurityManager: Changing modify acls groups to: 

2020-12-23 21:47:59,366 INFO spark.SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users  with view permissions: Set(root); groups with view permissions: Set(); users  with modify permissions: Set(root); groups with modify permissions: Set()

2020-12-23 21:47:59,436 INFO yarn.Client: Submitting application application_1608731015658_0001 to ResourceManager

2020-12-23 21:47:59,831 INFO impl.YarnClientImpl: Submitted application application_1608731015658_0001

2020-12-23 21:48:00,838 INFO yarn.Client: Application report for application_1608731015658_0001 (state: ACCEPTED)

2020-12-23 21:48:00,841 INFO yarn.Client: 

client token: N/A

diagnostics: [Wed Dec 23 21:48:00 +0800 2020] Scheduler has assigned a container for AM, waiting for AM container to be launched

ApplicationMaster host: N/A

ApplicationMaster RPC port: -1

queue: default

start time: 1608731279575

final status: UNDEFINED

tracking URL: http://BigData01:8088/proxy/application_1608731015658_0001/

user: root

2020-12-23 21:48:01,845 INFO yarn.Client: Application report for application_1608731015658_0001 (state: ACCEPTED)

.....

2020-12-23 21:48:09,879 INFO yarn.Client: Application report for application_1608731015658_0001 (state: ACCEPTED)

2020-12-23 22:06:42,871 INFO yarn.Client: 

client token: N/A

diagnostics: Application application_1608731015658_0001 failed 2 times due to Error launching appattempt_1608731015658_0001_000002. Got exception: java.net.ConnectException: Call From localhost/127.0.0.1 to localhost:43799 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused

at sun.reflect.GeneratedConstructorAccessor47.newInstance(Unknown Source)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:423)

at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:837)

at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:757)

at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1566)

at org.apache.hadoop.ipc.Client.call(Client.java:1508)

at org.apache.hadoop.ipc.Client.call(Client.java:1405)

at org.apache.hadoop.ipc.ProtobufRpcEngine2$Invoker.invoke(ProtobufRpcEngine2.java:234)

at org.apache.hadoop.ipc.ProtobufRpcEngine2$Invoker.invoke(ProtobufRpcEngine2.java:119)

at com.sun.proxy.$Proxy83.startContainers(Unknown Source)

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