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From "xiaowei wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-11095) SerDeUtils another bug ,when Text is reused
Date Fri, 26 Jun 2015 09:28:04 GMT

    [ https://issues.apache.org/jira/browse/HIVE-11095?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14602617#comment-14602617
] 

xiaowei wang commented on HIVE-11095:
-------------------------------------

According to the suggestion of Chengxiang Li ,I put up a new patch, HIVE-11095.2.patch.txt

> SerDeUtils  another bug ,when Text is reused
> --------------------------------------------
>
>                 Key: HIVE-11095
>                 URL: https://issues.apache.org/jira/browse/HIVE-11095
>             Project: Hive
>          Issue Type: Bug
>          Components: API, CLI
>    Affects Versions: 0.14.0, 1.0.0, 1.2.0
>         Environment: Hadoop 2.3.0-cdh5.0.0
> Hive 0.14
>            Reporter: xiaowei wang
>            Assignee: xiaowei wang
>             Fix For: 1.2.0
>
>         Attachments: HIVE-11095.1.patch.txt, HIVE-11095.2.patch.txt
>
>
> {noformat}
> The method transformTextFromUTF8 have a  error bug, It invoke a bad method of Text,getBytes()!
> The method getBytes of Text returns the raw bytes; however, only data up to Text.length
is valid.A better way is  use copyBytes()  if you need the returned array to be precisely
the length of the data.
> But the copyBytes is added behind hadoop1. 
> {noformat}
> How I found this bug?
> When i query data from a lzo table , I found in results : the length of the current
row is always largr than the previous row, and sometimes,the current row contains the
contents of the previous row。 For example ,i execute a sql ,
> {code:sql}
> select * from web_searchhub where logdate=2015061003
> {code}
> the result of sql see blow.Notice that ,the second row content contains the first row
content.
> {noformat}
> INFO [03:00:05.589] HttpFrontServer::FrontSH msgRecv:Remote=/10.13.193.68:42098,session=3151,thread=254
2015061003
> INFO [03:00:05.594] <18941e66-9962-44ad-81bc-3519f47ba274> session=901,thread=223ession=3151,thread=254
2015061003
> {noformat}
> The content of origin lzo file content see below ,just 2 rows.
> {noformat}
> INFO [03:00:05.635] <b88e0473-7530-494c-82d8-e2d2ebd2666c_forweb> session=3148,thread=285
> INFO [03:00:05.635] HttpFrontServer::FrontSH msgRecv:Remote=/10.13.193.68:42095,session=3148,thread=285
> {noformat}
> I think this error is caused by the Text reuse,and I found the solutions .
> Addicational, table create sql is : 
> {code:sql}
> CREATE EXTERNAL TABLE `web_searchhub`(
> `line` string)
> PARTITIONED BY (
> `logdate` string)
> ROW FORMAT DELIMITED
> FIELDS TERMINATED BY '
> U0000'
> WITH SERDEPROPERTIES (
> 'serialization.encoding'='GBK')
> STORED AS INPUTFORMAT "com.hadoop.mapred.DeprecatedLzoTextInputFormat"
> OUTPUTFORMAT "org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat";
> LOCATION
> 'viewfs://nsX/user/hive/warehouse/raw.db/web/web_searchhub' 
> {code}



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