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Re: Exception Handling

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On 12-03-11 06:54 PM, Novice wrote:
> Lew <noone@lewscanon.com> wrote in news:jjipli$np7$1@news.albasani.net:
> 
[ SNIP ]

>> We've discussed this before, remember?
>>
>> It's not expensive. When you're calling a logger statement for an
>> error, the cost of the error SWAMPS the time in the logger. Think
>> about it. 
>>
> I suppose I'm too easily swayed by other opinions. Arved, who seems very 
> knowledgeable, cited that article, which seemed to give it his seal of 
> approval. I don't know the author of the article but I tend to assume he 
> must be an expert to be asked to write about a Java topic. The author 
> cites people who he considers experts and the upshot is that the advice 
> seems to argue against putting positioning information in the log unless 
> its necessary (which it probably isn't if the stacktrace is in the log). 
> Now you make a persuasive argument contradicting the article. I'm 
> satisfied that you have serious expertise in this area so I have no 
> reason to dismiss your argument. But why didn't the experts who wrote the 
> article modify their remarks accordingly? 
[ SNIP ]

The article did have my "seal of approval". That's to say, I read the
article, and agreed with most of it. Not 100 percent, but most of it.
And I didn't see anything in it which would lead a person down the
garden path. I recommend it because it's a useful read...but you
shouldn't accept it as the gospel, just as you shouldn't accept
"Effective Java" as the gospel either.

Logging is also a somewhat subjective matter. That's why different
opinions on different specifics. Ultimately TIMTOWTDI, to borrow a Perl
motto. What really counts is when the rubber meets the road, and the
logs have to be _used_, did the ops support people get what they needed
out of the logs, without too much anguish?

You've heard different viewpoints - mine and others' - on including
positional informational in logs. In the final analysis what matters is
the sufficiency of information in the logs. Don't worry overmuch about
logging performance until it's a problem; the whole point of having
layouts in a properties file is that you can tweak them if necessary. I
have a specific reason why I don't normally include certain positional
information, except for error stacktraces, but someone else might have a
good reason for why they do want this info.

One note: *never* assume that because somebody has an article in a blog
or an Internet magazine or a dead tree magazine or even a scholarly
journal that they are experts. Check the references. Check the style of
the prose: are the conclusions backed up by understandable argument, or
are they just "put out there"? Google for other articles on the same topic.

AHS
-- 
Last week I helped my friend stay put. It's a lot easier'n helpin' 'em
move. I just went over to his house and made sure that he did not start
to load shit into a truck.
-- Mitch Hedberg

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Exception Handling Novice <novice@example..com> - 2012-03-11 01:51 +0000
  Re: Exception Handling Lew <noone@lewscanon.com> - 2012-03-10 18:39 -0800
    Re: Exception Handling Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-03-11 11:53 -0300
      Re: Exception Handling Lew <noone@lewscanon.com> - 2012-03-11 10:51 -0700
        Re: Exception Handling Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-03-11 16:35 -0300
    Re: Exception Handling Novice <novice@example..com> - 2012-03-11 17:05 +0000
      Re: Exception Handling Lew <noone@lewscanon.com> - 2012-03-11 10:53 -0700
        Re: Exception Handling Novice <novice@example..com> - 2012-03-11 20:36 +0000
      Re: Exception Handling Lew <noone@lewscanon.com> - 2012-03-11 11:07 -0700
        Re: Exception Handling Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-03-11 17:00 -0300
          Re: Exception Handling Novice <novice@example..com> - 2012-03-11 22:02 +0000
        Re: Exception Handling Arivald <NOSPAMarivald@interia.pl> - 2012-03-11 21:03 +0100
          Re: Exception Handling Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-03-11 18:31 -0300
        Re: Exception Handling Novice <novice@example..com> - 2012-03-11 21:54 +0000
          Re: Exception Handling Patricia Shanahan <pats@acm.org> - 2012-03-11 15:26 -0700
            Re: Exception Handling Novice <novice@example..com> - 2012-03-11 23:23 +0000
              Re: Exception Handling Lew <noone@lewscanon.com> - 2012-03-11 16:52 -0700
                Re: Exception Handling Novice <novice@example..com> - 2012-03-12 17:16 +0000
                Re: Exception Handling Lew <noone@lewscanon.com> - 2012-03-13 08:31 -0700
              Re: Exception Handling Patricia Shanahan <pats@acm.org> - 2012-03-11 17:51 -0700
                Re: Exception Handling Novice <novice@example..com> - 2012-03-12 17:26 +0000
            Re: Exception Handling Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 14:49 -0400
          Re: Exception Handling Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-03-11 20:46 -0300
            Re: Exception Handling Novice <novice@example..com> - 2012-03-12 17:43 +0000
      Re: Exception Handling Patricia Shanahan <pats@acm.org> - 2012-03-11 11:14 -0700
        Re: Exception Handling Novice <novice@example..com> - 2012-03-11 22:35 +0000
          Re: Exception Handling Lew <noone@lewscanon.com> - 2012-03-11 16:58 -0700
            Re: Exception Handling Novice <novice@example..com> - 2012-03-12 15:44 +0000
              Re: Exception Handling Gene Wirchenko <genew@ocis.net> - 2012-03-12 10:34 -0700
      Re: Exception Handling Arivald <NOSPAMarivald@interia.pl> - 2012-03-11 20:34 +0100
        Re: Exception Handling Novice <novice@example..com> - 2012-03-11 22:36 +0000
    Re: Exception Handling Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 14:41 -0400
  Re: Exception Handling Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 14:37 -0400
    Re: Exception Handling Novice <novice@example..com> - 2012-03-12 22:43 +0000
      Re: Exception Handling Lew <lewbloch@gmail.com> - 2012-03-12 16:11 -0700
      Re: Exception Handling Arivald <NOSPAMarivald@interia.pl> - 2012-03-13 00:54 +0100
        Re: Exception Handling Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-03-13 06:05 -0300

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