CrawlDatum.set() does not resets Metadata if it is null
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Key: NUTCH-756
URL: https://issues.apache.org/jira/browse/NUTCH-756
Project: Nutch
Issue Type: Bug
Reporter: Julien Nioche
Priority: Blocker
The patch Nutch-702 implemented the lazy instanciation of CrawlDatum objects,
but when using the method set(CrawlDatum) to copy the content of an instance
into the current object we did not reset the metadata of the current object if
it was null in the instance passed as argument. As a result, the metadata of
the current object might be kept from a previous CrawlDatum and won't
correspond to the other fields of the instance.
The patch attached fixes this issue.
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