Hive数据卡住，运行不出来

[JNSimba]

Status: Running (Executing on YARN cluster with App id application_1481466395876_274218)

--------------------------------------------------------------------------------
        VERTICES      STATUS  TOTAL  COMPLETED  RUNNING  PENDING  FAILED  KILLED
--------------------------------------------------------------------------------
Map 1 .........      RUNNING     47         44        3        0       0       0
Map 5 .........      RUNNING     47         46        1        0       0       0
Map 6 .........      RUNNING     47         46        1        0       0       0
Reducer 2            RUNNING     77          0       77        0       0       0
Reducer 3            RUNNING     62          0       15       47       0       0
Reducer 4             INITED     47          0        0       47       0       0
--------------------------------------------------------------------------------
VERTICES: 00/06  [==========>>----------------] 41%   ELAPSED TIME: 821.20 s   
--------------------------------------------------------------------------------

数据都是卡在running阶段，特别特别慢，有什么改进的方法么

跪求大神