-Re: Hive Query Issue
Sanjay Subramanian 2013-08-07, 19:31
Some quick checks
Please don't mind if my questions sound trivial
1. Is your hdfs cluster or pseudo-distributed node up and running
Can u see the HDFS at http://host:50070 ?
2. Is your mrV1 or Yarn (mrV2) up and running
2b) YARN http://host:8088
3. Is your hive-default xml; pointing to the job tracker
4. Can u run a MR job on your cluster independent of Hive ?
U can try the WordCount that comes standard with the examples
From: Manickam P <[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>>
Reply-To: "[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>" <[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>>
Date: Tuesday, August 6, 2013 4:10 AM
To: "[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>" <[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>>
Subject: RE: Hive Query Issue
Thanks for your reply. I have a small test table which has around 10 records. when i run select * from table.. it launched a job and that got completed successfully. When i run the same query in my actual table no job got initiated. it got struck. I did not get any error in my task tracker also. All my data nodes are up and running.
I don't have any clue here.
Date: Tue, 6 Aug 2013 16:24:38 +0530
Subject: Re: Hive Query Issue
From: [EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>
when you run select * from table .. it does not launch a mapreduce job,
where are when you put some condition, it does need to process the data so it launches a mapreduce job
now when you start this query, go to your jobtracker page and see how many jobs are running. Is it able to start your job? if not why ?
that will tell you why its stuck
On Tue, Aug 6, 2013 at 3:22 PM, Manickam P <[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>> wrote:
If i run a hive query like "select * from table_name limit 10" it is working.
If i run query like "select column_name from table_name limit 10" it hangs.
Total MapReduce jobs = 1
Launching Job 1 out of 1
Number of reduce tasks is set to 0 since there's no reduce operator
It just prints the above after that nothing happening in the hive shell.
Can you pls help me on this.
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