Ubuntu13.10下配置Nutch1.7和Solr4.6集成

1。系统准备

安装Ubuntu13.10，设置源，之后sudo apt-get update和sudo apt-get upgrade

2。相关软件准备

（1）安装ant

sudo apt-get install ant1.7,检查安装情况ant -version出现

Apache Ant version 1.7.1 compiled on September 3 2011

表明安装成功。

（2）jdk安装配置

从官网下载jdk，解压到目录/opt/jdk

环境变量配置：sudo gedit /etc/profile文末添加内容

export JAVA_HOME=/opt/jdk
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

保存推出，source /etc/profile使配置生效。

检验：java -version和java均有内容（内容省了粘贴）

（3）nutch

下载nutch1.7，解压到/opt/nutch

cd /opt/nutch

bin/nutch
此时会出现用法帮助，表示安装成功了。下面进行相关配置。

step1：修改文件conf/nutch-site.xml，设置HTTP请求中agent的名字： 




 
    http.agent.name
    Friendly Crawler
 

step2:创建种子文件夹
mkdir -p urls

step3:将种子URL写到文件urls/seed.txt中：sudo gedit seed.txt
http://www.36kr.com/

step4:配置 conf/regex-urlfilter.txt
# accept anything else
# +.

# added by yoyo
+36kr.com

step5:修改conf/nutch-site.xml，在里面增加一个parser.skip.truncated属性:
 
  parser.skip.truncated 
  false 

这是因为用tcpdump或者wireshark抓包发现，该网站的页面内容采用truncate的方式分段返回，而nutch的默认设置是不处理这种方式的，需要打开之，
参考：http://lucene.472066.n3.nabble.com/Content-Truncation-in-Nutch-2-1-MySQL-td4038888.html

step6:爬取实验

bin/nutch crawl urls -dir crawl

（4）Solr安装

下载solr4.6，解压到/opt/solr

cd /opt/solr/example

java -jar start.jar

如能正常打开网页http://localhost:8983/solr/则说明成功。

3.Nutch与Solr集成

（1）环境变量设置：

sudo gedit /etc/profile 添加

export NUTCH_RUNTIME_HOME=/opt/nutch

export APACHE_SOLR_HOME=/opt/solr

（2）集成

mkdir ${APACHE_SOLR_HOME}/example/solr/conf
cp ${NUTCH_RUNTIME_HOME}/conf/schema.xml ${APACHE_SOLR_HOME}/example/solr/conf/

重启solr：

java -jar start.jar

建立索引：

bin/nutch crawl urls  -dir crawl -depth 2 -topN 5 -solrhttp://localhost:8983/solr/

出错：

Active IndexWriters :
SOLRIndexWriter
     solr.server.url : URL of the SOLR instance (mandatory)
     solr.commit.size : buffer size when sending to SOLR (default 1000)
     solr.mapping.file : name of the mapping file for fields (default solrindex-mapping.xml)
     solr.auth : use authentication (default false)
     solr.auth.username : use authentication (default false)
     solr.auth : username for authentication
     solr.auth.password : password for authentication


Exception in thread "main" java.io.IOException: Job failed!
     at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1357)
     at org.apache.nutch.indexer.IndexingJob.index(IndexingJob.java:123)
     at org.apache.nutch.indexer.IndexingJob.index(IndexingJob.java:81)
     at org.apache.nutch.indexer.IndexingJob.index(IndexingJob.java:65)
     at org.apache.nutch.crawl.Crawl.run(Crawl.java:155)
     at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
     at org.apache.nutch.crawl.Crawl.main(Crawl.java:55)

解决方法是参考http://stackoverflow.com/questions/13429481/error-while-indexing-in-solr-data-crawled-by-nutch

类似的还有其他一些字段需要补充，方法是编辑 ~/solr-4.4.0/example/solr/collection1/conf/schema.xml，在…中增加以下的字段：
   
  
  
  
   

（3）验证

rm crawl/ -Rf

bin/nutch crawl urls  -dir crawl -depth 2 -topN 5 -solrhttp://localhost:8983/solr/

…………

…………

CrawlDb update: Merging segment data into db.
CrawlDb update: finished at 2014-03-03 08:55:30, elapsed: 00:00:01
LinkDb: starting at 2014-03-03 08:55:30
LinkDb: linkdb: crawl/linkdb
LinkDb: URL normalize: true
LinkDb: URL filter: true
LinkDb: internal links will be ignored.
LinkDb: adding segment: file:/opt/nutch/crawl/segments/20140303085430
LinkDb: adding segment: file:/opt/nutch/crawl/segments/20140303085441
LinkDb: finished at 2014-03-03 08:55:31, elapsed: 00:00:01
Indexer: starting at 2014-03-03 08:55:31
Indexer: deleting gone documents: false
Indexer: URL filtering: false
Indexer: URL normalizing: false
Active IndexWriters :
SOLRIndexWriter
    solr.server.url : URL of the SOLR instance (mandatory)
    solr.commit.size : buffer size when sending to SOLR (default 1000)
    solr.mapping.file : name of the mapping file for fields (default solrindex-mapping.xml)
    solr.auth : use authentication (default false)
    solr.auth.username : use authentication (default false)
    solr.auth : username for authentication
    solr.auth.password : password for authentication


Indexer: finished at 2014-03-03 08:55:35, elapsed: 00:00:03
SolrDeleteDuplicates: starting at 2014-03-03 08:55:35
SolrDeleteDuplicates: Solr url: http://localhost:8983/solr/
SolrDeleteDuplicates: finished at 2014-03-03 08:55:36, elapsed: 00:00:01
crawl finished: crawl
检索抓取到的内容，用浏览器打开 http://localhost:8983/solr/#/collection1/query ，点击Excute Query,出现如下画面：

参考：http://www.myexception.cn/operating-system/1440100.html