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GeezerVison is showing github.com — ServerFailedException ends ExtendedResolver resolution · Issue #247 · dnsjava/dnsjava

ServerFailedException ends ExtendedResolver resolution #247

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ServerFailedException ends ExtendedResolver resolution#247
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@nathankurtyka
nathankurtyka
opened on Feb 24, 2022
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Shouldn't a ServerFailedException simply invoke the next SimpleResolver? Currently, a (possibly transient) DNS error response seems to be irrecoverable.

Or is there a workaround I'm not seeing?

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  1. ibauersachs commented on Apr 7, 2022

    @ibauersachs
    ibauersachs
    on Apr 7, 2022
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    Sorry for not getting back to this earlier.

    ServerFailedException is created from a SERVFAIL response in LookupSession, regardless of the used resolver. If you're using a SimpleResolver this naturally ends the lookup.

    For ExtendedResolver, well, good question. A SERVFAIL response is not a network error and thus is considered a completed lookup. I guess there could be a (new) option added to ExtendedResolver that continues on SERVFAIL responses.

  2. ibauersachs
    added
    enhancement
    on Apr 7, 2022
  3. ibauersachs
    removed
    enhancement
    on Jan 26, 2025
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