Hi ,

I am interested to contribute to this JIRA, could anyone help me out where can 
I start.

https://issues.apache.org/jira/browse/KYLIN-824

Regards,
Srinivasan Hariharan



From: [email protected]
To: [email protected]
Subject: RE: Hive external Table Dimension
Date: Thu, 11 Jun 2015 21:51:08 +0530





Thanks, 

I have created JIRA.

https://issues.apache.org/jira/browse/KYLIN-824

I am interested to contribute, i will see the code and update for help.


> From: [email protected]
> To: [email protected]
> Subject: Re: Hive external Table Dimension
> Date: Thu, 11 Jun 2015 14:33:59 +0000
> 
> Kylin need take snapshot for lookup tables for runtime queries (to derive
> the dimensions that not on row key), that¹s why it try to seek the
> underlying data file;
> 
> So far without this it couldn¹t move ahead; For long run, Kylin can
> consider to abstract this; Please open a JIRA as requirement if you like;
> 
> On 6/11/15, 5:45 PM, "Srinivasan Hariharan02" <[email protected]>
> wrote:
> 
> >Hi,
> >
> >I have a dimension external  table in Hive which is created using Hbase
> >Storage handler. After creating the cube using this hive  table cube
> >build job failed  in the "Build Dimension Dictionary" with below error
> >java.lang.IllegalStateException: Expect 1 and only 1 non-zero file under
> >hdfs://host:8020/user/hive/warehouse/hbase.db/department/, but find 0
> >        at 
> >org.apache.kylin.dict.lookup.HiveTable.findOnlyFile(HiveTable.java:123)
> >        at 
> >org.apache.kylin.dict.lookup.HiveTable.computeHDFSLocation(HiveTable.java:
> >107)
> >        at 
> >org.apache.kylin.dict.lookup.HiveTable.getHDFSLocation(HiveTable.java:83)
> >        at 
> >org.apache.kylin.dict.lookup.HiveTable.getFileTable(HiveTable.java:76)
> >        at 
> >org.apache.kylin.dict.lookup.HiveTable.getSignature(HiveTable.java:71)
> >        at 
> >org.apache.kylin.dict.DictionaryManager.buildDictionary(DictionaryManager.
> >java:164)
> >        at 
> >org.apache.kylin.cube.CubeManager.buildDictionary(CubeManager.java:154)
> >        at 
> >org.apache.kylin.cube.cli.DictionaryGeneratorCLI.processSegment(Dictionary
> >GeneratorCLI.java:53)
> >        at 
> >org.apache.kylin.cube.cli.DictionaryGeneratorCLI.processSegment(Dictionary
> >GeneratorCLI.java:42)
> >        at 
> >org.apache.kylin.job.hadoop.dict.CreateDictionaryJob.run(CreateDictionaryJ
> >ob.java:53)
> >        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
> >        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
> >        at 
> >org.apache.kylin.job.common.HadoopShellExecutable.doWork(HadoopShellExecut
> >able.java:63)
> >        at 
> >org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutab
> >le.java:107)
> >        at 
> >org.apache.kylin.job.execution.DefaultChainedExecutable.doWork(DefaultChai
> >nedExecutable.java:50)
> >        at 
> >org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutab
> >le.java:107)
> >        at 
> >org.apache.kylin.job.impl.threadpool.DefaultScheduler$JobRunner.run(Defaul
> >tScheduler.java:132)
> >        at 
> >java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:
> >1145)
> >        at 
> >java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java
> >:615)
> >        at java.lang.Thread.run(Thread.java:744)
> >
> >Since external table created from other sources like Hbase hive doesn't
> >store any data in their warehouse directory. So it should not check for
> >files under  warehouse dir for external tables. Please help.
> >
> >Regards,
> >Srinivasan Hariharan
> >Mob +91-9940395830
> >
> >
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