Example for Spring Issue #33164.
Client Error is: IllegalArgumentException: empty headers are not allowed [] in this case.
The server returns an empty header sometimes (:).
MRE for reproducing "IllegalArgumentException: empty headers are not allowed []"
Repository from Github https://github.comdavid0/mre-spring-empty-header
Example for Spring Issue #33164.
Client Error is: IllegalArgumentException: empty headers are not allowed [] in this case.
The server returns an empty header sometimes (:).
MRE for reproducing "IllegalArgumentException: empty headers are not allowed []"