hadoop 提交 mapreduce假死的问题

hadoop版本是CDH5.3.3的，安装了伪分布模式，一直以来程序运行好好的，突然间运行mapreduce程序卡在running job上 ，mapreduce已经提交到yarn上去了  一直卡着没动 ，纠结了N天，总算搞定了，

之前还以为是我的内存不够 ，我把内存设置成6G了 ，没跑别的应用 ，查看内存使用情况

[ehp@hadoop-ehp hadoop-2.5.0-cdh5.3.3]$ free -m
             total       used       free     shared    buffers     cached
Mem:          5852       3585       2267          0        143       2567
-/+ buffers/cache:        873       4978
Swap:         4095          0       4095

显然不是内存的问题。

使用hadoop dfsadmin -report 查看hdfs 的状况

[ehp@hadoop-ehp hadoop-2.5.0-cdh5.3.3]$ hadoop dfsadmin -report
DEPRECATED: Use of this script to execute hdfs command is deprecated.
Instead use the hdfs command for it.

15/08/19 10:09:30 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Configured Capacity: 16702676992 (15.56 GB)
Present Capacity: 574803968 (548.18 MB)
DFS Remaining: 574779392 (548.15 MB)
DFS Used: 24576 (24 KB)
DFS Used%: 0.00%
Under replicated blocks: 0
Blocks with corrupt replicas: 0
Missing blocks: 0
Missing blocks (with replication factor 1): 0

-------------------------------------------------
Live datanodes (1):

Name: 192.168.1.120:50010 (hadoop-ehp.hyman.com)
Hostname: hadoop-ehp.hyman.com
Decommission Status : Normal
Configured Capacity: 16702676992 (15.56 GB)
DFS Used: 24576 (24 KB)
Non DFS Used: 16127873024 (15.02 GB)
DFS Remaining: 574779392 (548.15 MB)
DFS Used%: 0.00%
DFS Remaining%: 3.44%
Configured Cache Capacity: 0 (0 B)
Cache Used: 0 (0 B)
Cache Remaining: 0 (0 B)
Cache Used%: 100.00%
Cache Remaining%: 0.00%
Xceivers: 1
Last contact: Wed Aug 19 10:09:28 EDT 2015

[ehp@hadoop-ehp hadoop-2.5.0-cdh5.3.3]$ df -hl
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda2              16G   15G  549M  97% /
tmpfs                 2.9G   72K  2.9G   1% /dev/shm
/dev/sda1             194M   29M  156M  16% /boot

  很明显是硬盘空间不足导致。

解决方法：

1.增加硬盘的容量。