[jdk17] RFR: 8269543: The warning for System::setSecurityManager should only appear once for each caller

[Alan Bateman]

On 30/06/2021 08:19, Bernd Eckenfels wrote:
> Hello, sorry for being unpopular, but I just hate it to waste 
> developer resources,
>
> I realy think this deprecation message should be re-considered, it 
> broke a lot of things, the amount of work to implement a caching 
> solution feels like a waste of time and on top of it, there is no 
> clear replacement strategy published yet.
>
> I would restrict deprication (for removal if you really insist) to 
> javadoc and not poison stdout/stderr.
>

The purpose of the warning message is to make it very clear that 
applications that call System.setSecurityManager in a running VM will 
fail in the future. It is not hugely different to the "Illegal 
reflective access" warning that were emitted in JDK 9 to JDK 15. Maybe 
you could clarify what you mean by "it broke a lot of things". If you 
have something that is sensitive to warnings going to stderr then I 
would have expected the "Illegal reflective access" warnings to have 
caused a lot more issues.

-Alan.