[jira] [Updated] (NUTCH-2230) Nutch doesn't index all URLs found

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[jira] [Updated] (NUTCH-2230) Nutch doesn't index all URLs found

Cristian Vat (Jira)

     [ https://issues.apache.org/jira/browse/NUTCH-2230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sebastian Nagel updated NUTCH-2230:
-----------------------------------
    Fix Version/s: 2.5

> Nutch doesn't index all URLs found
> ----------------------------------
>
>                 Key: NUTCH-2230
>                 URL: https://issues.apache.org/jira/browse/NUTCH-2230
>             Project: Nutch
>          Issue Type: Bug
>          Components: generator
>    Affects Versions: 2.3.1
>         Environment: MongoDB with WiredTiger storage engine (3.2 but probably affects other versions as well)
>            Reporter: Aaron Cosand
>            Priority: Major
>             Fix For: 2.5
>
>
> The initial query run by the generator task, against mongodb, doesn't force ordering by _id.  This causes an incorrect selection of ranges for successive map-reduce related queries.  The successive queries do appear to be getting run in the correct order since _id is always indexed, but they should also explicitly specify a sort, since you are not guaranteed a particular order otherwise.  I didn't dig deep enough to see if the root of the problem is with nutch or gora, and whether it only affected mongo or could affect other databases as well.



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