https://bz.apache.org/bugzilla/show_bug.cgi?id=64192

            Bug ID: 64192
           Summary: Bug in Tomcat HTTP2 POST - with big payload
           Product: Tomcat 9
           Version: 9.0.31
          Hardware: PC
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Catalina
          Assignee: dev@tomcat.apache.org
          Reporter: lz.zukow...@gmail.com
  Target Milestone: -----

Created attachment 37056
  --> https://bz.apache.org/bugzilla/attachment.cgi?id=37056&action=edit
debug log and exception

I found a probably bug with http2 handling in tomcat.

When I sending HTTP2 POST request with big payload I see below exception.
This request is OK when I use Undertow for example or Tomcat with HTTP1.1

I prepared test where you can recreate this problem.
Here is link https://github.com/zulk666/demo-http2
To start the demo you have to run com.example.demo.DemoApplication first
then run test DemoApplicationTests.

Exception which I received is 
org.apache.coyote.http2.ConnectionException: Invalid frame type [HEADERS]


I tested also with curl, Chrome and Firefox and result is the same as in test.

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