As per the reactor-core:3.5.0 release notes some deprecated methods were removed. Although it's not yet possible to pass upgrade the version due to transitive dependencies from spring-boot using removed methods, we should start paving the work by remove the usage of the removed methods.

Comment From: marcusdacoregio

Hi @be0x74a,

see this issue to understand why we are not upgrading the version.

Comment From: be0x74a

Hi @be0x74a,

see this issue to understand why we are not upgrading the version.

Ah alright. Sorry I tried to look up for similar issues before raising this, but clearly failed.