Assuming that u can replicate this problem with say 100K records in the log
file versus some records in Hive
The way I would start the debug is
Select * from my_hive_table | sort hive.out.check1.sorted
Your original log file is say log.original.txt
Sort log.original.txt log.original.txt.sorted
Make sure separators in both files hive.out.check1.sorted and
log.original.txt.sorted are same
Diff log.original.txt.sorted hive.out.check1.sorted
See what u get…and analyze why some extra records came in
My guess is
=
In your Hive Meta Store, possibly there is another PARTITION that could be
pointing to a data location containing data from some previous logs….
sanjay
From: Raj Hadoop hadoop...@yahoo.commailto:hadoop...@yahoo.com
Reply-To: user@hive.apache.orgmailto:user@hive.apache.org
user@hive.apache.orgmailto:user@hive.apache.org, Raj Hadoop
hadoop...@yahoo.commailto:hadoop...@yahoo.com
Date: Friday, July 5, 2013 3:27 PM
To: user@hive.apache.orgmailto:user@hive.apache.org
user@hive.apache.orgmailto:user@hive.apache.org
Subject: Re: Loading a flat file + one additional field to a Hive table
Thanks Sanjay. I will look into this.
Also - one more question.
When I am trying to load log file to Hive and comparing the counts like this
select count(*) from Table
Versus
wc -l File
I see a few hundred records greater in Table. How should I debug it? Any
tips please.
From: Sanjay Subramanian
sanjay.subraman...@wizecommerce.commailto:sanjay.subraman...@wizecommerce.com
To: user@hive.apache.orgmailto:user@hive.apache.org
user@hive.apache.orgmailto:user@hive.apache.org; Raj Hadoop
hadoop...@yahoo.commailto:hadoop...@yahoo.com
Sent: Saturday, July 6, 2013 4:32 AM
Subject: Re: Loading a flat file + one additional field to a Hive table
How about this ?
Assume you have a log file called
oompaloompa.log
TIMESTAMP=$(date +%Y_%m_%d_T%H_%M_%S);mv oompaloopa.log
oompaloopa.log.${TIMESTAMP};cat oompaloopa.log.${TIMESTAMP}| hdfs dfs -put -
/user/sasubramanian/oompaloopa.log.${TIMESTAMP}
This will directly put the file on HDFS and u can put it to the LOCATION
specified by your HIVE TABLE definition
sanjay
From: manishbh...@rocketmail.commailto:manishbh...@rocketmail.com
manishbh...@rocketmail.commailto:manishbh...@rocketmail.com
Reply-To: user@hive.apache.orgmailto:user@hive.apache.org
user@hive.apache.orgmailto:user@hive.apache.org
Date: Friday, July 5, 2013 10:39 AM
To: Raj Hadoop hadoop...@yahoo.commailto:hadoop...@yahoo.com, Hive
user@hive.apache.orgmailto:user@hive.apache.org
Subject: Re: Loading a flat file + one additional field to a Hive table
Raj,
You should dump the data in a temp table first and then move the data into
final table with select query.
Select date(), c1,c2. From temp table.
Reason: we should avoid custom operation in load unless it is necessary.
Sent via Rocket from my HTC
- Reply message -
From: Raj Hadoop hadoop...@yahoo.commailto:hadoop...@yahoo.com
To: Hive user@hive.apache.orgmailto:user@hive.apache.org
Subject: Loading a flat file + one additional field to a Hive table
Date: Fri, Jul 5, 2013 10:30 PM
Hi,
Can any one please suggest the best way to do the following in Hive?
Load 'todays date stamp' + ALL FIELDS C1,C2,C3,C4 IN A FILE F1 to a Hive
table T1 ( D1,C1,C2,C3,C4)
Can the following command be modified in some way to acheive the above
hive load data local inpath '/software/home/hadoop/dat_files/' into table
T1;
My requirement is to append a date stamp to a Web log file and then load it to
Hive table.
Thanks,
Raj
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