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From "Roland (JIRA)" <>
Subject [jira] [Commented] (NUTCH-1511) Metadata in MYSQL updated with 'garbage'
Date Fri, 08 Feb 2013 21:25:14 GMT


Roland commented on NUTCH-1511:


this happens with cassandra, too. And the patch from NUTCH-1478 is not necessary to trigger
this behavior.
Removing the scoring-opic plugin fixes this.

nutch relase 2.1

java version "1.6.0_18"
OpenJDK Runtime Environment (IcedTea6 1.8.13) (6b18-1.8.13-0+squeeze2)
OpenJDK 64-Bit Server VM (build 14.0-b16, mixed mode)

# cat /etc/debian_version

> Metadata in MYSQL updated with 'garbage'
> ----------------------------------------
>                 Key: NUTCH-1511
>                 URL:
>             Project: Nutch
>          Issue Type: Bug
>          Components: fetcher, injector, storage
>    Affects Versions: 2.1
>         Environment: Ubuntu 12.04
>            Reporter: J. Gobel
>              Labels: metadata, mysql, nutch, scoring-opic
>             Fix For: 2.2
> After applying patch for Metadata parser (NUTCH-1478) I notice that the metadata field
just before the crawl ends is populated with the correct information. However when the crawl
is completely finished the metadata field is populated with 'garbage' _csh_�����

> I notice in my SQL log file that the scoring plugin is overwriting the metadata field
in a final data insertion with '_csh_ \0\0\0\0\'. When I remove 'scoring-opic' out of 'plugin.includes'
property in the nutch-site.xml , the metadata-field is crisp and clear.
> MYSQL LOG FILE: (I did a crawl on Below you will see a fragments
of my MYSQL log file, only the moments when data is written to the METADATA field in the MYSQL
> First Insertion .. here I suppose scoring-opic writes its information, _csh_ ?€\0\0\0

> 58 Query    INSERT INTO webpage (fetchInterval,fetchTime,id,markers,metadata,score )VALUES
(2592000,1357122976493,'org.apache.nutch:http/',' dist 0 _injmrk_ y\0','
> _csh_ ?€\0\0\0',1.0) ON DUPLICATE KEY UPDATE fetchInterval=2592000,fetchTime=1357122976493,markers='
dist 0 _injmrk_ y\0',metadata='
> _csh_ ?€\0\0\0',score=1.0
> Second Insertion - inhere scraped metada is inserted into metadata. 
>  81 Query    INSERT INTO webpage (id,markers,metadata,outlinks,parseStatus,signature,text,title
)VALUES ('org.apache.nutch:http/',
> The final insertion -  please note that here the metadata field is overwritten with _CSH_\0\0\0\0
> 90 Query    INSERT INTO webpage (fetchTime,id,inlinks,markers,metadata )VALUES (1359714995075,'org.apache.nutch:http/','
> Nutch\0',' dist 0 _injmrk_ y _updmrk_*1357122982-1745626508 __prsmrk__*1357122982-1745626508
_gnmrk_*1357122982-1745626508 _ftcmrk_*1357122982-1745626508\0','
> _csh_ \0\0\0\0\0') ON DUPLICATE KEY UPDATE fetchTime=1359714995075,inlinks=' 0

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