NUTCH-2946 Fetcher: optionally slow down fetching from hosts with repeated exceptions #728
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… repeatedly with exceptions or HTTP status codes mapped to ProtocolStatus.EXCEPTION (HTTP 403 Forbidden, 429 Too many requests, 5xx server errors, etc.)
…eated exceptions - configure the delay in seconds as a float instead of milliseconds - use the value of fetcher.server.delay as default - double the delay with every observed exception (exponential backoff) but cap the growth at 2**31 to avoid overflows
sebastian-nagel
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NUTCH-2946-fetcher-queue-exception-slow-down
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Fetcher to slow down fetching from hosts where requests fail repeatedly with exceptions or HTTP status codes mapped to ProtocolStatus.EXCEPTION (HTTP 403 Forbidden, 429 Too many requests, 5xx server errors, etc.)