> On Dec 23, 2021, at 10:07 AM, Vladimir Sitnikov <sitnikov.vladi...@gmail.com> 
> wrote:
> 
> 
> Do you know migration to 2.x is not a drop-in replacement?
> It might require code or non-trivial configuration changes?
> For instance, if the application extends 1.x appenders, implements
> non-trivial re-configuration logic,
> then it can't upgrade to 2.x in a matter of days or weeks.

Do you know that for a fact?  Have you tried the support for 1.x appenders, 
etc? I can’t say it always works but I am quite sure you can’t say it never 
does.

Ralph

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