LARGE FILES: Process files > 2 MB

The Tomcat standard configuration limits the maximum processing size of a POST request to 2 MB.

You can set this limit in <CATALINA>\conf\server.xml increase or cancel via the maxPostSize parameter (-1):

    <Connector port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000″
               maxPostSize="-1″
               redirectPort="8443" />

https://tomcat.apache.org/tomcat-9.0-doc/config/http.html