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From "Xiaowei Wang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-12541) Using CombineHiveInputFormat with the origin inputformat SymbolicTextInputFormat ,it will get a wrong result
Date Mon, 30 Nov 2015 15:32:10 GMT

     [ https://issues.apache.org/jira/browse/HIVE-12541?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xiaowei Wang updated HIVE-12541:
--------------------------------
    Description: 
Table desc :
{noformat}
CREATE External TABLE `symlink_text_input_format`(
  `key` string,
  `value` string)
ROW FORMAT SERDE
  'org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe'
STORED AS INPUTFORMAT
  'org.apache.hadoop.hive.ql.io.SymlinkTextInputFormat'
OUTPUTFORMAT
  'org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'
LOCATION
  'viewfs://nsX/user/hive/warehouse/symlink_text_input_format'  
{noformat}
There is a link file in the dir '/user/hive/warehouse/symlink_text_input_format' ,   the content
of the link file is 
{noformat}
 viewfs://nsx/tmp/symlink* 
{noformat}
it contains one path ,and the path contains a regex!


Execute the sql : 
{noformat}
set hive.rework.mapredwork = true ;
set hive.input.format=org.apache.hadoop.hive.ql.io.CombineHiveInputFormat;
set mapred.min.split.size.per.rack= 0 ;
set mapred.min.split.size.per.node= 0 ;
set mapred.max.split.size= 0 ;
select count(*) from  symlink_text_input_format ;

{noformat}
It will result a wrong result :0

At the same time ,I add a test case in the patch.


  was:
Table desc :
{noformat}
CREATE External TABLE `symlink_text_input_format`(
  `key` string,
  `value` string)
ROW FORMAT SERDE
  'org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe'
STORED AS INPUTFORMAT
  'org.apache.hadoop.hive.ql.io.SymlinkTextInputFormat'
OUTPUTFORMAT
  'org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'
LOCATION
  'viewfs://nsX/user/hive/warehouse/symlink_text_input_format'  
{noformat}
There is a link file in the dir '/user/hive/warehouse/symlink_text_input_format' ,   the content
of the link file is 
{noformat}
 viewfs://nsx/tmp/symlink* 
{noformat}
it contains one path ,and the path contains a regex!


Execute the sql : 
{noformat}
set hive.input.format=org.apache.hadoop.hive.ql.io.CombineHiveInputFormat;
set mapred.min.split.size.per.rack= 0 ;
set mapred.min.split.size.per.node= 0 ;
set mapred.max.split.size= 0 ;
select count(*) from  symlink_text_input_format ;

{noformat}
It will result a wrong result :0

At the same time ,I add a test case in the patch.



> Using CombineHiveInputFormat with the origin inputformat  SymbolicTextInputFormat  ,it
will get a wrong result
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-12541
>                 URL: https://issues.apache.org/jira/browse/HIVE-12541
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.14.0, 1.2.0, 1.2.1
>            Reporter: Xiaowei Wang
>            Assignee: Xiaowei Wang
>             Fix For: 1.2.1
>
>         Attachments: 12541.0.patch.txt
>
>
> Table desc :
> {noformat}
> CREATE External TABLE `symlink_text_input_format`(
>   `key` string,
>   `value` string)
> ROW FORMAT SERDE
>   'org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe'
> STORED AS INPUTFORMAT
>   'org.apache.hadoop.hive.ql.io.SymlinkTextInputFormat'
> OUTPUTFORMAT
>   'org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'
> LOCATION
>   'viewfs://nsX/user/hive/warehouse/symlink_text_input_format'  
> {noformat}
> There is a link file in the dir '/user/hive/warehouse/symlink_text_input_format' ,  
the content of the link file is 
> {noformat}
>  viewfs://nsx/tmp/symlink* 
> {noformat}
> it contains one path ,and the path contains a regex!
> Execute the sql : 
> {noformat}
> set hive.rework.mapredwork = true ;
> set hive.input.format=org.apache.hadoop.hive.ql.io.CombineHiveInputFormat;
> set mapred.min.split.size.per.rack= 0 ;
> set mapred.min.split.size.per.node= 0 ;
> set mapred.max.split.size= 0 ;
> select count(*) from  symlink_text_input_format ;
> {noformat}
> It will result a wrong result :0
> At the same time ,I add a test case in the patch.



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