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https://issues.apache.org/jira/browse/NUTCH-3142?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on NUTCH-3142 started by Lewis John McGibbney.
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> Add Error Context to Metrics
> ----------------------------
>
> Key: NUTCH-3142
> URL: https://issues.apache.org/jira/browse/NUTCH-3142
> Project: Nutch
> Issue Type: Sub-task
> Components: metrics
> Reporter: Lewis John McGibbney
> Assignee: Lewis John McGibbney
> Priority: Major
> Fix For: 1.22
>
>
> Current error metrics lack granularity. While protocol status codes are
> tracked dynamically, there's no categorization of:
> * HTTP error codes (4xx vs 5xx)
> * Exception types (timeout, connection refused, DNS failure)
> * Parse failure reasons
> This makes it difficult to diagnose crawl issues from metrics alone e.g.
> necessitating the interrogation of logs, adding complexity to
> troubleshooting.
> This ticket will add new error context metrics for FetcherThread,
> ParseSegment and IndexerMapReduce.
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