[tomcat] Is there a max size for POST parameter content?

I'm troubleshooting a Java app where XML is sent between two systems using HTTP POST and Servlet. I suspect that the problem is that the XML is growing way too big. Is it possible that this is the problem? Is there a limit?

When it doesn't work, the request.getParameter("message") on the consumer side will return null. Both apps are running on TomCat. For instance, an XML document of size 1.73mb will not make it through.

There may be a limit depending on server and/or application configuration. For Example, check

There is no defined maximum size for HTTP POST requests. If you notice such a limit then it's an arbitrary limitation of your HTTP Server/Client.

You might get a better answer if you tell how big the XML is.

Yes there is 2MB max and it can be increased by configuration change like this. If your POST body is not in form of multipart file then you might need to add the max-http-post configuration for tomcat in the application yml configuration file.

Increase max size of each multipart file to 10MB and total payload size of 100MB max

 spring:
    servlet:
      multipart:max-file-size: 10MB
      multipart:max-request-size: 100MB
 

Setting max size of post requests which might just be the formdata in string format to ~10 MB

 server:
    tomcat:
        max-http-post-size: 100000000 # max-http-form-post-size: 10MB for new version

You might need to add this for the latest sprintboot version ->

server: tomcat: max-http-form-post-size: 10MB