Re: [tarantool-patches] [PATCH 0/1] Fixed non-informative error messages for log conf

[Vladimir Davydov <vdavydov.dev@gmail.com>]

There's no point in a cover-letter if you're submitting a single patch.

You can include the text below either in the commit message or just put
it in the patch email after '---' if you don't want it in the git log.

On Mon, Jul 30, 2018 at 04:58:00PM +0300, Olga Arkhangelskaia wrote:
> Tarantool log used to have more serious problems than non-informative messages:
> No check on parameters like log_nonblock, log_format in case of unconfigured log.
> This means that there was a possibility to set any value in case when the
> first log conf. commands were: 
> box.cfg{log_format = ‘any’}
> box.cfg{log_nonblock=true} - (together with stderr)
> In case of log_format  with such scenario additional problem took place.
> When setting log format we change format_func
> (function that actually logs to log) to NULL, and wrong log_format
> lead to crash - because we could not log error with log format because of 
> format_func was not set yet, but already had been changed to null.
> In case of undefined log type  (“log=’:test:’:) we used to have empty
> exception - so,tarantool just silently crashed.
> I think the main problem that initial initialization is mixed up with
> configuring parameters.  So if we decide to refactor log we need to separate
> them. For example, have set of checking functions and set of configuring.
> One parameter - one check.
> End initial initialization should use the same way prior setting any parameter.
> 
> Patch fixes this problems using the easiest way, however if in future we need
> some more parameters - we should consider the idea of refactor.
>  
> Olga Arkhangelskaia (1):
>   Fixed non-informative error messages for log conf.
> 
>  src/box/box.cc            | 25 ++++++++++++++++++-------
>  src/say.c                 | 22 +++++++++++++++-------
>  src/say.h                 |  4 +++-
>  test/box-tap/cfg.test.lua |  2 +-
>  4 files changed, 37 insertions(+), 16 deletions(-)