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https://issues.apache.org/jira/browse/NUTCH-2029?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alexander Yastrebov updated NUTCH-2029:
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Description:
Gora mongodb backend returns empty Utf8 for null field values.
This leads to Mark.checkMark never returns null, so multiple checks on null
fail e.g. in DbUpdateMapper, GeneratorMapper etc.
Temporal fix is to check whether value is null or empty
See patch
https://github.com/newpointer/nutch/commit/4bdc0bab39ede7c01ee057c3429f5f0e90d5e48f
and related gora issue
https://issues.apache.org/jira/browse/GORA-423
was:
Gora mongodb backend return empty Utf8 for null field values.
This leads to Mark.checkMark never returns null, so multiple checks on null
fail e.g. in DbUpdateMapper, GeneratorMapper etc.
Temporal fix is to check whether value is null or empty
https://github.com/newpointer/nutch/commit/4bdc0bab39ede7c01ee057c3429f5f0e90d5e48f
See https://issues.apache.org/jira/browse/GORA-423
> Mark.checkMark returns empty string when null is expected with mongodb storage
> ------------------------------------------------------------------------------
>
> Key: NUTCH-2029
> URL: https://issues.apache.org/jira/browse/NUTCH-2029
> Project: Nutch
> Issue Type: Bug
> Components: storage
> Affects Versions: 2.3
> Reporter: Alexander Yastrebov
>
> Gora mongodb backend returns empty Utf8 for null field values.
> This leads to Mark.checkMark never returns null, so multiple checks on null
> fail e.g. in DbUpdateMapper, GeneratorMapper etc.
> Temporal fix is to check whether value is null or empty
> See patch
> https://github.com/newpointer/nutch/commit/4bdc0bab39ede7c01ee057c3429f5f0e90d5e48f
> and related gora issue
> https://issues.apache.org/jira/browse/GORA-423
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