Nutch2.x 集成ElasticSearch 抓取+索引

http://blog.csdn.net/eryk86/article/details/14111811

 

使用https://github.com/apache/nutch.git导入nutch项目到intellij

 

配置ivy.xml和conf下的gora.properties、nutch-site.xml

修改ivy/ivy.xml

     修改elasticsearch版本

<dependency org="org.elasticsearch" name="elasticsearch" rev="0.90.5" conf="*->default"/>

     去掉如下内容注解

<dependency org="org.apache.gora" name="gora-hbase" rev="0.3" conf="*->default" />

     修改软件版本，从1.2.15改成1.2.16，解决部分包导入失败问题

<dependency org="log4j" name="log4j" rev="1.2.16" conf="*->master" />

修改gora.properties

     注掉如下几行

#gora.sqlstore.jdbc.driver=org.hsqldb.jdbc.JDBCDriver
#gora.sqlstore.jdbc.url=jdbc:hsqldb:hsql://localhost/nutchtest
#gora.sqlstore.jdbc.user=sa
#gora.sqlstore.jdbc.password=

     添加一行

gora.datastore.default=org.apache.gora.hbase.store.HBaseStore

 

修改nutch-site.xml，增加如下配置项

<property>
    <name>storage.data.store.class</name>
    <value>org.apache.gora.hbase.store.HBaseStore</value>
</property>
<property>
    <name>http.agent.name</name>
    <value>NutchCrawler</value>
</property>
<property>
    <name>parser.character.encoding.default</name>
    <value>utf-8</value>
</property>
<property>
    <name>http.accept.language</name>
    <value>ja-jp, en-us, zh-cn,en-gb,en;q=0.7,*;q=0.3</value>
</property>
<property>
    <name>generate.batch.id</name>
    <value>1</value>
</property>

 

增加hbase配置文件hbase-site.xml到nutch/conf中  

<configuration>
    <property>
        <name>hbase.rootdir</name>
        <value>file:///data/hbase</value>
    </property>
    <property>
        <name>hbase.zookeeper.property.dataDir</name>
        <value>/data/zookeeper</value>
    </property>
</configuration>

 

修改nutch/src/bin/nutch，文件开头增加

      NUTCH_JAVA_HOME=/usr/local/jdk

 

修改src下org.apache.nutch.indexer.elastic.ElasticWriter 109行，使支持es0.90.5

      item.isFailed()

 

删除nutch/conf下所有template文件

 

编译nutch

      ant clean 

      ant runtime

 

修改nutch-site.xml

<property>
    <name>plugin.folders</name>
    <value>/home/eryk/workspace/nutch/runtime/local/plugins</value>
</property>

设置intelil，增加nutch/conf和nutch/runtime/lib到classpath

File->Project Structure->Dependencies 增加nutch/conf和nutch/runtime/local/lib目录

 

增加pom.xml的依赖库

<dependency>
    <groupId>net.sourceforge.nekohtml</groupId>
    <artifactId>nekohtml</artifactId>
    <version>1.9.15</version>
</dependency>
<dependency>
    <groupId>org.ccil.cowan.tagsoup</groupId>
    <artifactId>tagsoup</artifactId>
    <version>1.2</version>
</dependency>
<dependency>
    <groupId>rome</groupId>
    <artifactId>rome</artifactId>
    <version>1.0</version>
</dependency>

 

修改pom.xml中es版本

<dependency>
     <groupId>org.elasticsearch</groupId>
     <artifactId>elasticsearch</artifactId>
     <version>0.90.5</version>
     <optional>true</optional>
</dependency>

 

修正依赖库的版本冲突

<dependency>
    <groupId>org.restlet.jse</groupId>
    <artifactId>org.restlet.ext.jackson</artifactId>
    <version>2.0.5</version>
               <exclusions>
                   <exclusion>
                       <artifactId>jackson-core-asl</artifactId>
                       <groupId>org.codehaus.jackson</groupId>
                   </exclusion>
                   <exclusion>
                       <artifactId>jackson-mapper-asl</artifactId>
                       <groupId>org.codehaus.jackson</groupId>
                   </exclusion>
               </exclusions>
               <optional>true</optional>
 </dependency>
     <dependency>
                   <groupId>org.apache.gora</groupId>
                   <artifactId>gora-core</artifactId>
                   <version>0.3</version>
               <exclusions>
                   <exclusion>
                       <artifactId>jackson-mapper-asl</artifactId>
                       <groupId>org.codehaus.jackson</groupId>
                   </exclusion>
               </exclusions>
               <optional>true</optional>
           </dependency>

修改src下org.apache.nutch.crawl.Crawler代码，增加-elasticindex和-batchId参数

 

 Map<String,Object> argMap = ToolUtil.toArgMap(
    Nutch.ARG_THREADS, threads,
    Nutch.ARG_DEPTH, depth,
    Nutch.ARG_TOPN, topN,
    Nutch.ARG_SOLR, solrUrl,
    ElasticConstants.CLUSTER,elasticSearchAddr,      //使用es建立索引
    Nutch.ARG_SEEDDIR, seedDir,
    Nutch.ARG_NUMTASKS, numTasks,
    Nutch.ARG_BATCH,batchId,      //解决NullPointerException问题
    GeneratorJob.BATCH_ID,batchId);       //解决NullPointerException问题，貌似没用
run(argMap);

 

修改org.apache.nutch.indexer.elastic.ElasticWriter代码，支持-elasticindex ip:port传参

public void open(TaskAttemptContext job) throws IOException {
    String clusterName = job.getConfiguration().get(ElasticConstants.CLUSTER);
    if (clusterName != null && !clusterName.contains(":")) {
      node = nodeBuilder().clusterName(clusterName).client(true).node();
    } else {
      node = nodeBuilder().client(true).node();
    }
    LOG.info(String.format("clusterName=[%s]",clusterName));

    if(clusterName.contains(":")){
        String[] addr = clusterName.split(":");
        client = new TransportClient()
                .addTransportAddress(new InetSocketTransportAddress(addr[0],Integer.parseInt(addr[1])));

    }else{
        client = node.client();
    }

    bulk = client.prepareBulk();
    defaultIndex = job.getConfiguration().get(ElasticConstants.INDEX, "index");
    maxBulkDocs = job.getConfiguration().getInt(
        ElasticConstants.MAX_BULK_DOCS, DEFAULT_MAX_BULK_DOCS);
    maxBulkLength = job.getConfiguration().getInt(
        ElasticConstants.MAX_BULK_LENGTH, DEFAULT_MAX_BULK_LENGTH);
  }

 

在nutch目录下增加urls目录，在url目录下新建seed.txt，写入要爬的种子地址

 

运行Crawler

     传入参数

     urls -elasticindex a2:9300 -threads 10 -depth 3 -topN 5 -batchId 1

     观察nutch/hadoop.log日志

           2013-11-03 22:57:36,682 INFO  elasticsearch.node - [Ikonn] started
2013-11-03 22:57:36,682 INFO  elastic.ElasticWriter - clusterName=[a2:9300]
2013-11-03 22:57:36,692 INFO  elasticsearch.plugins - [Electron] loaded [], sites []
2013-11-03 22:57:36,863 INFO  basic.BasicIndexingFilter - Maximum title length for indexing set to: 100
2013-11-03 22:57:36,864 INFO  indexer.IndexingFilters - Adding org.apache.nutch.indexer.basic.BasicIndexingFilter
2013-11-03 22:57:36,864 INFO  anchor.AnchorIndexingFilter - Anchor deduplication is: off
2013-11-03 22:57:36,865 INFO  indexer.IndexingFilters - Adding org.apache.nutch.indexer.anchor.AnchorIndexingFilter
2013-11-03 22:57:37,946 INFO  elastic.ElasticWriter - Processing remaining requests [docs = 86, length = 130314, total docs = 86]
2013-11-03 22:57:37,988 INFO  elastic.ElasticWriter - Processing to finalize last execute
2013-11-03 22:57:41,986 INFO  elastic.ElasticWriter - Previous took in ms 1590, including wait 3998
2013-11-03 22:57:42,020 INFO  elasticsearch.node - [Ikonn] stopping ...
2013-11-03 22:57:42,032 INFO  elasticsearch.node - [Ikonn] stopped
2013-11-03 22:57:42,032 INFO  elasticsearch.node - [Ikonn] closing ...
2013-11-03 22:57:42,039 INFO  elasticsearch.node - [Ikonn] closed
2013-11-03 22:57:42,041 WARN  mapred.FileOutputCommitter - Output path is null in cleanup
2013-11-03 22:57:42,057 INFO  elastic.ElasticIndexerJob - Done

查询es

     http://a2:9200/_search?q=%E7%BE%8E%E5%A5%B3&pretty=true

     返回结果，说明已经跑通了，观察hbase中，表已经自动建好，并存入了已经爬到的数据

     

 

参考

http://www.blogjava.net/paulwong/archive/2013/08/31/403513.html

http://my.oschina.net/mynote/blog/152845

http://www.searchtech.pro/nutch2.1-elasticsearch-mysql-local-Integrate

http://blog.csdn.net/laigood/article/details/7625862