正在运行map减少程序，但是卡住了。
19/09/16 09:35:04 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
19/09/16 09:35:04 INFO client.RMProxy: Connecting to ResourceManager at localhost/127.0.0.1:8032
19/09/16 09:35:05 WARN mapreduce.JobResourceUploader: Hadoop command-line option parsing not performed. Implement the Tool interface and execute your application with ToolRunner to remedy this.
19/09/16 09:35:05 INFO input.FileInputFormat: Total input files to process : 1
19/09/16 09:35:06 INFO mapreduce.JobSubmitter: number of splits:1
19/09/16 09:35:06 INFO Configuration.deprecation: yarn.resourcemanager.system-metrics-publisher.enabled is deprecated. Instead, use yarn.system-metrics-publisher.enabled
19/09/16 09:35:07 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1568605566346_0002
19/09/16 09:35:07 INFO impl.YarnClientImpl: Submitted application application_1568605566346_0002
19/09/16 09:35:07 INFO mapreduce.Job: The url to track the job: http://ec2-18-222-170-204.us-east-2.compute.amazonaws.com:8088/proxy/application_1568605566346_0002/
19/09/16 09:35:07 INFO mapreduce.Job: Running job: job_1568605566346_0002
这是我的磁盘可用性
Filesystem Size Used Avail Use% Mounted on
udev 3.9G 0 3.9G 0% /dev
tmpfs 786M 9.5M 776M 2% /run
/dev/sda3 184G 12G 163G 7% /
tmpfs 3.9G 138M 3.7G 4% /dev/shm
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/sda5 125G 21G 98G 18% /home
cgmfs 100K 0 100K 0% /run/cgmanager/fs
tmpfs 786M 60K 786M 1% /run/user/1000
tmpfs 786M 0 786M 0% /run/user/1001
请问，怎么了..？它只是单个节点hadoop集群。
谢谢