Major Description
SitemapProcesser writes values from the sitemap into the CrawlDB without verification or plausibility check:
- priority - used as CrawlDatum score
- modification time
- change frequency - used as fetch interval
Since these values in the sitemap cannot be trusted, the processor should make sure that they are in acceptable ranges:
- priority > 0.0 (a score of 0.0 would cause that a URL is never fetched)
- modification time: not in the future
- change frequency / fetch interval within [db.fetch.schedule.adaptive.min_interval, db.fetch.schedule.max_interval]
See also NUTCH-2975