Hive query execution which involve map reduce job fails

Hi,

I am getting this error and Hive does not respond after this erro.

hive> select count(*) from yutubedata;
Query ID = prasuna7718_20180830112651_49febc40-b669-4b4f-842a-63e80cf3cd93
Total jobs = 1
Launching Job 1 out of 1
Number of reduce tasks determined at compile time: 1
In order to change the average load for a reducer (in bytes):
set hive.exec.reducers.bytes.per.reducer=
In order to limit the maximum number of reducers:
set hive.exec.reducers.max=
In order to set a constant number of reducers:
set mapreduce.job.reduces=
Starting Job = job_1534772926501_1751, Tracking URL = http://ip-172-31-35-141.ec2.internal:8088/proxy/application_1534772926501_1751/
Kill Command = /usr/hdp/2.6.5.0-292/hadoop/bin/hadoop job -kill job_1534772926501_1751

Please let me know whats wrong here?

Regards,
Prasuna