我正在使用Nutch1.9并尝试使用单个命令进行爬网。当进入第二级生成器返回0记录时可以看出输出。 任何人都遇到过这个问题？我被困在这里过去2天。搜索了所有可能的选项。任何线索/帮助将非常感激。
<br>####### INJECT ######<br>
Injector: starting at 2015-04-08 17:36:20 <br>
Injector: crawlDb: crawl/crawldb<br>
Injector: urlDir: urls<br>
Injector: Converting injected urls to crawl db entries.<br>
Injector: overwrite: false<br>
Injector: update: false<br>
Injector: Total number of urls rejected by filters: 0<br>
Injector: Total number of urls after normalization: 1<br>
Injector: Total new urls injected: 1<br>
Injector: finished at 2015-04-08 17:36:21, elapsed: 00:00:01<br>
#### GENERATE ###<br>
Generator: starting at 2015-04-08 17:36:22<br>
Generator: Selecting best-scoring urls due for fetch.<br>
Generator: filtering: true<br>
Generator: normalizing: true<br>
Generator: topN: 100000<br>
Generator: jobtracker is 'local', generating exactly one partition.<br>
Generator: Partitioning selected urls for politeness.<br>
Generator: segment: crawl/segments/20150408173625<br>
Generator: finished at 2015-04-08 17:36:26, elapsed: 00:00:03<br>
crawl/segments/20150408173625<br>
#### FETCH ####<br>
Fetcher: starting at 2015-04-08 17:36:26<br>
Fetcher: segment: crawl/segments/20150408173625<br>
Using queue mode : byHost<br>
Fetcher: threads: 10<br>
Fetcher: time-out divisor: 2<br>
QueueFeeder finished: total 1 records + hit by time limit :0<br>
Using queue mode : byHost<br>
fetching https://ifttt.com/recipes/search?q=SmartThings (queue crawl delay=5000ms)<br>
Using queue mode : byHost<br>
Using queue mode : byHost<br>
Thread FetcherThread has no more work available<br>
-finishing thread FetcherThread, activeThreads=1<br>
Using queue mode : byHost<br>
Thread FetcherThread has no more work available<br>
-finishing thread FetcherThread, activeThreads=1<br>
Using queue mode : byHost<br>
Thread FetcherThread has no more work available<br>
-finishing thread FetcherThread, activeThreads=1<br>
Using queue mode : byHost<br>
Thread FetcherThread has no more work available<br>
-finishing thread FetcherThread, activeThreads=1<br>
Using queue mode : byHost<br>
Thread FetcherThread has no more work available<br>
-finishing thread FetcherThread, activeThreads=1<br>
Thread FetcherThread has no more work available<br>
-finishing thread FetcherThread, activeThreads=1<br>
Using queue mode : byHost<br>
Thread FetcherThread has no more work available<br>
-finishing thread FetcherThread, activeThreads=1<br>
Using queue mode : byHost<br>
Thread FetcherThread has no more work available<br>
-finishing thread FetcherThread, activeThreads=1<br>
Using queue mode : byHost<br>
Fetcher: throughput threshold: -1<br>
Thread FetcherThread has no more work available<br>
Fetcher: throughput threshold retries: 5<br>
-finishing thread FetcherThread, activeThreads=1<br>
-activeThreads=1, spinWaiting=0, fetchQueues.totalSize=0, fetchQueues.getQueueCount=1<br>
-activeThreads=1, spinWaiting=0, fetchQueues.totalSize=0, fetchQueues.getQueueCount=1<br>
-activeThreads=1, spinWaiting=0, fetchQueues.totalSize=0, fetchQueues.getQueueCount=1<br>
-activeThreads=1, spinWaiting=0, fetchQueues.totalSize=0, fetchQueues.getQueueCount=1<br>
Thread FetcherThread has no more work available<br>
-finishing thread FetcherThread, activeThreads=0<br>
-activeThreads=0, spinWaiting=0, fetchQueues.totalSize=0, fetchQueues.getQueueCount=0<br>
-activeThreads=0<br>
Fetcher: finished at 2015-04-08 17:36:33, elapsed: 00:00:06<br>
#### PARSE ####<br>
ParseSegment: starting at 2015-04-08 17:36:33<br>
ParseSegment: segment: crawl/segments/20150408173625<br>
ParseSegment: finished at 2015-04-08 17:36:35, elapsed: 00:00:01<br>
######## UPDATEDB ##########<br>
CrawlDb update: starting at 2015-04-08 17:36:36<br>
CrawlDb update: db: crawl/crawldb<br>
CrawlDb update: segments: [crawl/segments/20150408173625]<br>
CrawlDb update: additions allowed: true<br>
CrawlDb update: URL normalizing: false<br>
CrawlDb update: URL filtering: false<br>
CrawlDb update: 404 purging: false<br>
CrawlDb update: Merging segment data into db.<br>
CrawlDb update: finished at 2015-04-08 17:36:37, elapsed: 00:00:01<br>
##### GENERATE ######<br>
Generator: starting at 2015-04-08 17:36:38<br>
Generator: Selecting best-scoring urls due for fetch.<br>
Generator: filtering: true<br>
Generator: normalizing: true<br>
Generator: topN: 100000<br>
Generator: jobtracker is 'local', generating exactly one partition.<br>
Generator: 0 records selected for fetching, exiting ...<br>
####### EXTRACT #########<br>
crawl/segments/20150408173625<br>
#### Segments #####<br>
20150408173625<br>
编辑： 所以我检查了另一个带有查询参数（http://queue.acm.org/detail.cfm?id=988409）的网址，并且它抓好了......
所以这意味着它特意没有抓取我原来的网址：https://ifttt.com/recipes/search?q=SmartThings&ac=true
我已尝试为此ifttt域抓取没有查询字符串的网址，并且nutch成功抓取它...
我认为问题在于使用查询字符串抓取https网站。 关于这个问题的任何帮助？
答案 0 :(得分：5)
默认情况下，忽略或过滤掉包含查询参数的链接。要启用带参数的抓取网址，请转到 conf / regex-urlfilter.txt ，并通过在该行的开头添加＃来注释以下行。
# skip URLs containing certain characters as probable queries, etc.
#-[?*!@=]
答案 1 :(得分：0)
好吧，我找到了解决方案。这是我的错误。 ifttt域过滤了我想要通过robots.txt抓取的特定区域
在抓取之前，只检查该网站是否允许其自行抓取
通过检查robots.txt