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我正在使用使用 Cassandra 作为存储的 Nutch 2.x。目前我只抓取一个网站，数据以字节码格式加载到 Cassandra。当我在 Nutch 中使用 readdb 命令时，我确实得到了任何有用的爬取数据。

以下是我得到的不同文件和输出的详细信息：

==========命令运行爬虫=====================

bin/crawl urls/ crawlDir/ http://localhost:8983/solr/ 3

========================seed.txt 数据====================== ====

http://www.ft.com

=== readdb 命令的输出以从 cassandra 网页.f 表中读取数据====== 

~/Documents/Softwares/apache-nutch-2.3/runtime/local$ bin/nutch readdb -dump data -content
~/Documents/Softwares/apache-nutch-2.3/runtime/local/data$ cat part-r-00000 
http://www.ft.com/  key:    com.ft.www:http/
baseUrl:    null    
status: 4 (status_redir_temp)    
fetchTime:  1426888912463
prevFetchTime:  1424296904936
fetchInterval:  2592000
retriesSinceFetch:  0    
modifiedTime:   0    
prevModifiedTime:   0
protocolStatus: (null)    
parseStatus:    (null)
title:  null
score:  1.0
marker _injmrk_ :   y
marker dist :   0    
reprUrl:    null    
batchId:    1424296906-20007    
metadata _csh_ :

===============regex-urlfilter.txt 的内容======================

# skip file: ftp: and mailto: urls
-^(file|ftp|mailto):

# skip image and other suffixes we can't yet parse
# for a more extensive coverage use the urlfilter-suffix plugin
-\.(gif|GIF|jpg|JPG|png|PNG|ico|ICO|css|CSS|sit|SIT|eps|EPS|wmf|WMF|zip|ZIP|ppt|PPT|mpg|MPG|xls|XLS|gz|GZ|rpm|RPM|tgz|TGZ|mov|MOV|exe|EXE|jpeg|JPEG|bmp|BMP|js|JS)$

# skip URLs containing certain characters as probable queries, etc.    
-[?*!@=]

# skip URLs with slash-delimited segment that repeats 3+ times, to break loops
-.*(/[^/]+)/[^/]+\1/[^/]+\1/

# accept anything else    
+.

===========困扰我的日志文件内容======================

2015-02-18 13:57:51,253 ERROR store.CassandraStore - 
2015-02-18 13:57:51,253 ERROR store.CassandraStore - [Ljava.lang.StackTraceElement;@653e3e90
2015-02-18 14:01:45,537 INFO  connection.CassandraHostRetryService - Downed Host Retry service started with queue size -1 and retry delay 10s

如果您需要更多信息，请告诉我。有人可以帮帮我吗 ？

提前致谢。-苏曼特

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1 回答 1

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我今天才开始使用 Nutch 和 Cassandra。在爬网期间，我的日志文件中没有收到相同的错误。

您是否仔细检查了您的 nutch-site.xml 和 gora.properties 设置？这就是我目前配置文件的方式。

nutch-site.xml

    <configuration>
    <property>
    <name>http.agent.name</name>
    <value>My Spider</value>
    </property>
    <property> 
       <name>storage.data.store.class</name> 
       <value>org.apache.gora.cassandra.store.CassandraStore</value>
       <description>Default class for storing data</description>
    </property>
</configuration>

gora.properties

#############################
# CassandraStore properties #
#############################
gora.datastore.default=org.apache.gora.cassandra.store.CassandraStore
gora.cassandrastore.servers=localhost:9160
于 2015-02-19T22:25:35.893 回答