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https://issues.apache.org/jira/browse/NUTCH-1521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13570019#comment-13570019
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lufeng commented on NUTCH-1521:
-------------------------------
Hi Lewis, I found the CrawlDbFilter class is only used in Nutch 1.x, not found
in Nutch 2.x, so i think this patch is only applied to nutch 1.7. Thanks for
your review.
> CrawlDbFilter pass null url to urlNormailzers
> ---------------------------------------------
>
> Key: NUTCH-1521
> URL: https://issues.apache.org/jira/browse/NUTCH-1521
> Project: Nutch
> Issue Type: Bug
> Affects Versions: 1.7
> Reporter: lufeng
> Assignee: lufeng
> Priority: Trivial
> Fix For: 1.7, 2.2
>
> Attachments: CrawlDbFilter_v1.patch, NUTCH-1521-trunk.patch,
> TestCrawlDbFilter.java
>
>
> urlNormalizers will get null url if we set CRAWLDB_PURGE_404, and it will
> throw NullPointerException. and the WARN Log will output something like this
> "Skipping null NullPointerException".
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