[greatgib]

The point is that if your program itself take note of the error from the library it is ok. You, as the program owner, can decide what to do with it (error log or not).

But if you are the SMTP library and that you unilaterally log that as an error. That is an issue.

[dminuoso]

This would require a complete new ecosystem and likely new language where any degradation of code flow becomes communicatable in a standardized and fully documented fashion.

The closest we have is something like Java with exceptions in type signatures, but we would have to ban any kind of exception capture except from final programs, and promote basically any logger call int an exception that you could remotely suppress.

We could philosophize about a world with compilers made out of unobtanium - but in this reality a library author cannot know what conditions are fixable or necessitate a fix or not. And structured logging lacks has way too many deficiencies to make it work from that angle.

[zamadatix]

The counterpoint made above is while what you describe is indeed the way the author likes to see it that doesn't explain why "an error is something which failed that the program was unable to fix automatically" is supposed to be any less valid a way to see it. I.e. should error be defined as "the program was unable to complete the task you told it to do" or only "things which could have worked but you need to explicitly change something locally".

I don't even know how to say whether these definitions are right or wrong, it's just whatever you feel like it should be. The important thing is what your program logs should be documented somewhere, the next most important thing is that your log levels are self consistent and follow some sort of logic, and that I would have done it exactly the same is not really important.

At the end of the day, this is just bikeshedding about how to collapse ultra specific alerting levels into a few generic ones. E.g. RFC 5424 defines 8 separate log levels for syslog and, while that's not a ceiling by any means, it's easy to see how there's already not really going to be a universally agreed way to collapse even just these down to 4 categories.

[hinkley]

Any robust system isn’t going to rely on reading logs to figure out what to do about undelivered email anyway. If you’re doing logistics the failure to send an order confirmation needs to show up in your data model in some manner. Managing your application or business by logs is amateur hour.

There’s a whole industry of “we’ll manage them for you” which is just enabling dysfunction.