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https://issues.apache.org/jira/browse/NUTCH-1613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13711150#comment-13711150
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lufeng commented on NUTCH-1613:
-------------------------------
Does this specified cookie string will effect all crawling urls?
> Timeouts in protocol-httpclient when crawling same host with >2 threads and
> added cookie strings for both http protocols
> ------------------------------------------------------------------------------------------------------------------------
>
> Key: NUTCH-1613
> URL: https://issues.apache.org/jira/browse/NUTCH-1613
> Project: Nutch
> Issue Type: Bug
> Components: protocol
> Affects Versions: 2.2.1
> Reporter: Brian
> Priority: Minor
> Labels: patch
> Attachments: NUTCH-1613.patch
>
>
> 1.) When using protocol-httpclient to crawl a single website (the same host)
> I would always get a bunch of timeout errors during fetching and the pages
> with errors would not be fetched. E.g.:
> 2013-07-09 17:57:13,717 WARN fetcher.FetcherJob - fetch of http://www....
> failed with: org.apache.commons.httpclient.ConnectionPoolTimeoutException:
> Timeout waiting for connection
> 2013-07-09 17:57:13,718 INFO fetcher.FetcherJob - fetching http://www....
> (queue crawl delay=0ms)
> 2013-07-09 17:57:13,715 ERROR httpclient.Http - Failed with the following
> error:
> org.apache.commons.httpclient.ConnectionPoolTimeoutException: Timeout waiting
> for connection
> at
> org.apache.commons.httpclient.MultiThreadedHttpConnectionManager.doGetConnection(MultiThreadedHttpConnectionManager.java:497)
> at
> org.apache.commons.httpclient.MultiThreadedHttpConnectionManager.getConnectionWithTimeout(MultiThreadedHttpConnectionManager.java:416)
> at
> org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:153)
> at
> org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
> at
> org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
> at
> org.apache.nutch.protocol.httpclient.HttpResponse.<init>(HttpResponse.java:95)
> at org.apache.nutch.protocol.httpclient.Http.getResponse(Http.java:174)
> at
> org.apache.nutch.protocol.http.api.HttpBase.getProtocolOutput(HttpBase.java:133)
> at
> org.apache.nutch.fetcher.FetcherReducer$FetcherThread.run(FetcherReducer.java:518)
> This is because by default the connection pool manager only allows 2
> connections per host so if more than 2 threads are used the others will tend
> to time out waiting to get a connection. The code previously set max
> connections correctly but not connection per host.
> 2.) I also added at the same time simple modifications to both protocol-http
> and protocol-httpclient to allow specifying a cookie string in the conf file
> to include in request headers.
> I use this to crawl site content requiring authentication - it is better for
> me to specify the cookie string for the authentication than go through the
> whole authentication process and specifying login info.
> The nutch-site.xml property is the following:
> <property>
> <name>http.cookie_string</name>
> <value>XX_AL=authorization_value_goes_here</value>
> <description>String to use as the cookie value for HTTP
> requests</description>
> </property>
> Although I use it for authentication it can be used to specify any single
> cookie string for the crawl (httpclient does support different cookies for
> different hosts but I did not get into that).
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