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Don't exit dnsdist on an exception in maintenance #4640

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@pieterlexis
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@pieterlexis pieterlexis commented Oct 26, 2016

Short description

dnsdist would exit if an exception was thrown in the maintenance function.

This change logs every minute if the maintenance function throws an exception.

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@phonedph1
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@phonedph1 phonedph1 commented Oct 26, 2016

Nice! Fixes the biggest complaint in #4312

infolog("Error during execution of maintenance function: %s", e.what());
secondsToWaitLog = 61;
}
--secondsToWaitLog;

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@rgacogne

rgacogne Oct 27, 2016
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This should probably be decremented by interval instead of one, in case we decide to make the interval duration configurable.

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@pieterlexis

pieterlexis Oct 27, 2016
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we might amend the assignment of secondsToWaitLog to that configuration setting. as the decrement then still happens every second?

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@rgacogne

rgacogne Oct 27, 2016
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If interval is not guaranteed to be equal to 1 anymore, the decrement won't happen every second except if we alter the code to do so. This would probably be needed to keep the cache cleaning delay consistent anyhow.

(*f)();
secondsToWaitLog = 0;
}
catch(LuaContext::ExecutionErrorException &e) {

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@rgacogne

rgacogne Oct 27, 2016
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Perhaps we could catch std::runtime_error, or even std::exception instead of LuaContext::ExecutionErrorException? Because otherwise we don't catch LuaContext::SyntaxErrorException nor LuaContext::WrongTypeException for example, although I'm not sure they can be raised in that context.

This change logs every minute if the maintenance function throws an
exception.
@pieterlexis pieterlexis force-pushed the pieterlexis:dnsdist-no-shutdown-on-maintenance-error branch from e1bf476 to 5f3ea71 Nov 1, 2016
@rgacogne rgacogne merged commit a1821a7 into PowerDNS:master Nov 9, 2016
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@pieterlexis pieterlexis deleted the pieterlexis:dnsdist-no-shutdown-on-maintenance-error branch Nov 9, 2016
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3 participants