It seems that TikaServer 1.25 header like “X-Tika-PDFOcrStrategy” is case sensitive. Same can be confirmed for latest main brunch version.
This is creating issue in a system where request headers are automatically lowercased, before passing down to TikaServer.
"Field names are case-insensitive"
The issue is due to
First a case-sensitive checking happens for startsWith "X-Tika-PDF" or "X-Tika-OCR". Then getDeclaredField of the respective config class is called to get field, and invokes the setter method.
The same is maintained in newer TikaServer.
Case-insensitive checking for startsWith. For getDeclaredField we can assume only fields will be there (irrespective of case) for any name, and then find out the field for it. Then derive setter from actual field name. Invoke the same.