Hi Bejoy, even If if perform count(*) operation on table it shows error,
select count(*) from dummysite; Total MapReduce 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=<number> In order to limit the maximum number of reducers: set hive.exec.reducers.max=<number> In order to set a constant number of reducers: set mapred.reduce.tasks=<number> Starting Job = job_201207231123_0011, Tracking URL = http://localhost:50030/jobdetails.jsp?jobid=job_201207231123_0011 Kill Command = /HADOOP/hadoop-0.20.2/bin/../bin/hadoop job -Dmapred.job.tracker=localhost:9001 -kill job_201207231123_0011 Hadoop job information for Stage-1: number of mappers: 1; number of reducers: 1 2012-07-24 13:38:18,928 Stage-1 map = 0%, reduce = 0% 2012-07-24 13:38:21,938 Stage-1 map = 100%, reduce = 0% 2012-07-24 13:39:22,170 Stage-1 map = 100%, reduce = 0% 2012-07-24 13:39:25,181 Stage-1 map = 100%, reduce = 100% Ended Job = job_201207231123_0011 with errors Error during job, obtaining debugging information... Examining task ID: task_201207231123_0011_m_000002 (and more) from job job_201207231123_0011 Exception in thread "Thread-93" 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(JobDebugger.java:211) at org.apache.hadoop.hive.ql.exec.JobDebugger.run(JobDebugger.java:81) at java.lang.Thread.run(Thread.java:680) Caused by: java.io.IOException: Server returned HTTP response code: 407 for URL: http://10.203.33.81:50060/tasklog?taskid=attempt_201207231123_0011_r_000000_0&start=-8193 at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1436) at java.net.URL.openStream(URL.java:1010) 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 Reduce: 1 HDFS Read: 24 HDFS Write: 0 FAIL Total MapReduce CPU Time Spent: 0 msec Please suggest why this error is comming :-( Regards Yogesh Kumar ________________________________ From: Bejoy KS [bejoy...@yahoo.com] Sent: Tuesday, July 24, 2012 12:52 PM To: user@hive.apache.org Subject: Re: Hive Query Hi Yogesh Can you try out this? select count(*), site.name from sitealias join site on (site_alias.site_id=site.site_id) Group By site.name; Regards Bejoy KS Sent from handheld, please excuse typos. ________________________________ From: <yogesh.kuma...@wipro.com> Date: Tue, 24 Jul 2012 07:14:25 +0000 To: <user@hive.apache.org> ReplyTo: user@hive.apache.org Subject: Hive Query Hi all, I have two tables 1) sitealias 2) site sitealias contains ------------------------- id site_id ---------------------------- 1 15 2 12 3 12 4 15 --------------------------- site contains ----------------------------- site_id name ------------------------------- 12 google 13 wiki 14 yahoo 15 flipcart --------------------------------- I am runing a query to perform equi join and to result how many times same site_id repeats and its name and it gets group bi site id. result of query I want --------------------------------- site_id name --------------------------------- 2 google 2 flipcart ---------------------------------- I performed select sitealias.count(*), site.name from sitealias join site on (site_alias.site_id=site.site_id); it shows error : Parse Error: mismatched input '(' expecting FROM near 'count' in from clause Please help and suggest a query of this kind of operations. 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