Re: How to execute query with timestamp type (Hbase/Hive integeration)

[Mark Grover <mg...@oanda.com>]

Hi Peyton,
I've been using Integer to store Unix timestamps in Hive and that seems to work fine.

Let me know if I misunderstood your question:-)

Mark
----- Original Message -----
From: "Peyton Peng" <pe...@yunyou.tv>
To: user@hive.apache.org
Sent: Thursday, May 31, 2012 2:41:15 AM
Subject: Re: How to execute query with timestamp type (Hbase/Hive integeration)

Hi Mark,

thanks for your response, I tried with other data type, it seems the issue 
occur while query the timestamp field only, not sure how the timestamp 
mapping work...

>From the hbase, I seek the data and the value of timestamp(event_time) is: 
Wed May 30 16:15:06 CST 2012, should I should the value as long type?

Regards,
Peyton

-----原始邮件----- 
From: Mark Grover
Sent: Thursday, May 31, 2012 11:14 AM
To: user@hive.apache.org
Subject: Re: How to execute query with timestamp type (Hbase/Hive 
integeration)

Hi Peyton,
It seems like something to do with timestamp mapping.
What happens if you change your Hive table definition to have the event_time 
as int or string?

Mark

----- Original Message -----
From: "Peyton Peng" <pe...@yunyou.tv>
To: user@hive.apache.org
Sent: Wednesday, May 30, 2012 5:54:20 AM
Subject: Re: How to execute query with timestamp type (Hbase/Hive 
integeration)




Actually I can execute the first sql and it works well, all the libs you 
specified is under the hive lib folder,

I doubt if the issue is caused by the timestamp mapping between hbase with 
hive..

Regards,
Peyton





From: shashwat shriparv
Sent: Wednesday, May 30, 2012 5:26 PM
To: user@hive.apache.org
Subject: Re: How to execute query with timestamp type (Hbase/Hive 
integeration)

Add these file to hive lib folder

>>> hadoop-0.20-core.jar
>>> hive/lib/hive-exec-0.7.1.jar
>>> hive/lib/hive-jdbc-0.7.1.jar
>>> hive/lib/hive-metastore-0.7.1.jar
>>> hive/lib/hive-service-0.7.1.jar
>>> hive/lib/libfb303.jar
>>> lib/commons-logging-1.0.4.jar
>>> slf4j-api-1.6.1.jar
>>> slf4j-log4j12-1.6.1.jar

and then try

On Wed, May 30, 2012 at 2:23 PM, Peyton Peng < pengpeng@yunyou.tv > wrote:






Hi,

I build the hive table mapped with hbase table,

CREATE TABLE http_access(key string, client_ip string, client_port int, 
request_method string, event_time timestamp)
STORED BY 'org.apache.hadoop.hive.hbase.HBaseStorageHandler'
WITH SERDEPROPERTIES (
"hbase.columns.mapping" = 
":key,client:ip,client:port,request:method,request:event_time"
);

The data is store with hbase client.

I get an issue while query with hive for (hbase/hive integration), while I 
execute sql: select ip, port, request_method from http_access , it works 
well with no problem,

but while I execute below sql: select ip, port, event_time from http_access, 
I got below exception.

The only difference between two sqls is: the event_time is timestamp type, I 
can scan the corresponding hbase table and see the value of event_time is:
1338365792142 column=request:event_time, timestamp=1338365739818, value=Wed 
May 30 16:15:06 CST 2012

Anyone who know what the issue is? (Not sure if I made a wrong mapping or 
should I just store the timestamp value as long in hbase? currently I store 
the value as java.util.Date)

Thank you very much....

Regards,
Peyton

Exception tracking:

Total MapReduce jobs = 1
Launching Job 1 out of 1
Number of reduce tasks is set to 0 since there's no reduce operator
****hdfs://Server:9000/user/hive/warehouse/http_access
Starting Job = job_201205291421_0008, Tracking URL = 
http://Server:50030/jobdetails.jsp?jobid=job_201205291421_0008
Kill Command = /<here is the hadoop_home>/libexec/../bin/hadoop 
job -Dmapred.job.tracker=Server:9001 –kill job_201205291421_0008
Hadoop job information for Stage-1: number of mappers: 1; number of 
reducers: 0
2012-05-30 16:28:01,572 Stage-1 map = 0%, reduce = 0%
2012-05-30 16:28:34,707 Stage-1 map = 100%, reduce = 100%
Ended Job = job_201205291421_0008 with errors
Error during job, obtaining debugging information...
Examining task ID: task_201205291421_0008_m_000002 (and more) from job 
job_201205291421_0008
Exception in thread "Thread-211" java.lang.RuntimeException: Error while 
reading from task log url
at 
org.apache.hadoop.hive.ql.exec.errors.TaskLogProcessor.getErrors(TaskLogProcessor.java:130)
at 
org.apache.hadoop.hive.ql.exec.JobDebugger.showJobFailDebugInfo(JobDebuggerjava:211)
at org.apache.hadoop.hive.ql.exec.JobDebugger.run(JobDebugger.java:81)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.IOException: Server returned HTTP response code: 400 for 
URL: 
http://Server:50060/tasklog?taskid=attempt_201205291421_0008_m_000000_1&start=-8193
at 
sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1305)
at java.net.URL.openStream(URL.java:1009)
at 
org.apache.hadoop.hive.ql.exec.errors.TaskLogProcessor.getErrors(TaskLogProcessor.java:120)
.. 3 more
FAILED: Execution Error, return code 2 from 
org.apache.hadoop.hive.ql.exec.MapRedTask
MapReduce Jobs Launched:
Job 0: Map: 1 HDFS Read: 0 HDFS Write: 0 FAIL
Total MapReduce CPU Time Spent: 0 msec





-- 


∞ Shashwat Shriparv