Re: [log4perl-devel] Interesting Bug/Feature

[Mike S. <m...@pe...>]

On Fri, 15 Jul 2005, Michael Smith wrote:

> The essence of this bug, is that Log4Perl dies silently when writing to
> a logfile larger than the users 'ulimit'.

The reason for this is that in the file appender,

    print $fh $params{message};

doesn't check for errors, like a full disk or a user quota. That's
clearly a bug, I'll check into it ...

Thanks for the note!

-- Mike

Mike Schilli
m...@pe...

>
> It manifested when I was using a script in a postfix alias
> (/etc/postfix/aliases)
>
> test: "|/usr/local/adm/script.pl"
>
> I had the Log4Perl configured to send email and to write to the logfile.
>
> When I ran the tests by sending to the alias, I got the emails from
> log4perl, but nothing was in the logfile. No exceptions or errors were
> thrown.
>
> When I ran the script manually, it worked (I got the e-mails, and
> entries in the logfile).
>
> The logfile at the time was 64MB, and the postfix 'message_size_limit'
> was set to 20MB.
>
> >From what I can tell, the 'shell' that postfix spawns as user nobody,
> when it executes the script, has the ulimit set to the value of the
> 'message_size_limit'.
>
> As soon as I made it write to a new file, I got the messages in the
> logfile (file had identical permissions)
>
> I changed it back to the old file, and didn't get messages.
>
> I nulled the logfile and tried again, and then I got the messages in the
> logfile.
>
> The problem is , that Log4Perl doesn't throw any kind of exception or
> error when it attempts to write to a file larger than its ulimit.
>
> Can this be logged as a bug, I am happy to provide any further detail
> you may require
>
> Mike
>
>
> ---
> Of course I don't look busy.....I did it right the first time.
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