Help: hadoop wordcount has been pending state graphs. The Job: Running Job: job

Structures, when single node pseudo distributed system, the configuration operation mode for the yarn (change to local run wordcount normal), has been no response, suspended,
To see a lot of posts, check for normal hosts, originally log has a wrning hint what storage is too small, no wrning, after adding the Linux memory

But the program still can not run normally,
Effect and the resourcemanager logs:

Server memory of 4 g:

 [hadoopuser @ hadoop101 logs] $free -m 
Total 2 free Shared buff/cache available 
Mem: 8, 3774, 1509, 1869, 395, 1992 
Swap: 2047 0, 2047

XML configuration: yarn - site.

 & lt; ! - Reducer for the way to get the data, & gt; 
 
 Yarn. The nodemanager. Aux - services 
 Mapreduce_shuffle & lt;/value> 
 

 
 Yarn. The resourcemanager. Hostname 
 Hadoop101 & lt;/value> 
 

 
 Yarn. The log - aggregation - enable 
 True 
 

 
 Yarn. The log - aggregation. Retain - seconds 
 604800 & lt;/value>

Configuration: XML mapred - site.

 & lt; Configuration> 
 
 Graphs. Framework. Name 
 Yarn 
 
 
 Graphs. Jobhistory. Address 
 Hadoop101:10020 & lt;/value> 
 
 
 Graphs. Jobhistory. Webapp. Address 
 Hadoop101:19888 & lt;/value>

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