[ http://issues.apache.org/jira/browse/NUTCH-322?page=all ]
Andrzej Bialecki closed NUTCH-322.
-----------------------------------
Resolution: Fixed
Fixed in trunk/, rev. 490607 . NOTE: this doesn't solve the whole issue of
proper handling of redirected pages from the point of view of scoring and
LinkDB, but it does solve the original issue described here.
> Fetcher discards ProtocolStatus, doesn't store redirected pages
> ---------------------------------------------------------------
>
> Key: NUTCH-322
> URL: http://issues.apache.org/jira/browse/NUTCH-322
> Project: Nutch
> Issue Type: Bug
> Components: fetcher
> Affects Versions: 0.8
> Reporter: Andrzej Bialecki
> Assigned To: Andrzej Bialecki
> Fix For: 0.9.0
>
>
> Fetcher doesn't store ProtocolStatus in output segments. ProtocolStatus
> contains important information, such as protocol-level response code,
> lastModified time, and possibly other messages.
> I propose that ProtocolStatus should be stored inside CrawlDatum.metaData,
> which is then stored into crawl_fetch (in Fetcher.FetcherThread.output()). In
> addition, if ProtocolStatus contains a valid lastModified time, that
> CrawlDatum's modified time should also be set to this value.
> Additionally, Fetcher doesn't store redirected pages. Content of such pages
> is silently discarded. When Fetcher translates from protocol-level status to
> crawldb-level status it should probably store such pages with the following
> translation of status codes:
> * ProtocolStatus.TEMP_MOVED -> CrawlDatum.STATUS_DB_RETRY. This code
> indicates a transient change, so we probably shouldn't mark the initial URL
> as bad.
> * ProtocolStatus.MOVED -> CrawlDatum.STATUS_DB_GONE. This code indicates a
> permanent change, so the initial URL is no longer valid, i.e. it will always
> result in redirects.
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