req.content().hasEntity() Returns True for GET Requests When Using HTTP/2 with TLS

[iampratapak]

Environment Details

• Helidon Version: 4.3.1
• Helidon SE or Helidon MP: SE
• JDK version: 25.0.1+8.1
• OS: MacOS

---

Problem Description

In my Helidon SE 4.3.1 application, I have enabled both HTTP/2 and TLS

I have the following dependency included:

<dependency>
    <groupId>io.helidon.webserver</groupId>
    <artifactId>helidon-webserver-http2</artifactId>
</dependency>

I am noticing that when TLS is enabled and the HTTP version is 2.0, req.content().hasEntity() always returns true, even for GET requests that have no body.

However, when TLS is disabled, req.content().hasEntity() correctly returns false for GET calls using HTTP version 2.0

Similarly, when TLS is enabled and the HTTP version is 1.1, req.content().hasEntity() also returns false correctly for GET calls.

Steps to reproduce

1. Use the helidon-webserver-http2 dependency
2. Configure TLS (Transport Layer Security)
3. Send an HTTP/2.0 GET request without a body

I have also attached the reproducer 'Quick Start' application here

helidon-quickstart-se.zip

[iampratapak]

Due to this, the following code is failing with a SocketTimeoutException. I have attached the logs.

try (HttpClientResponse clientResponse = req.content().hasEntity() ?
                    httpClientRequest.submit(req.content().as(String.class)) :
                    httpClientRequest.request()) {
                
       final String content = clientResponse.entity().as(String.class);
       res.send(content);
                
}

GET_Request_Log.txt

[danielkec]

There is seems to be an extra data frame being logged:

2025.11.12 20:13:47 FINER io.helidon.http.http2.Http2LoggingFrameListener.recv VirtualThread[#59,[0x40285af3 0x2d461490] WebServer socket]/runnable@ForkJoinPool-1-worker-1: [0x40285af3 0x2d461490] recv 1: frame header data
+--------+-------------------------------------------------+----------------+
|   index|  0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f |            data|
+--------+-------------------------------------------------+----------------+
|00000000| 00 00 22 01 05 00 00 00 01                      |.."......       |
+--------+-------------------------------------------------+----------------+

2025.11.12 20:13:47 FINE io.helidon.http.http2.Http2LoggingFrameListener.recv VirtualThread[#59,[0x40285af3 0x2d461490] WebServer socket]/runnable@ForkJoinPool-1-worker-1: [0x40285af3 0x2d461490] recv 1: HEADERS frame <length=34, stream_id=1, flags=00000101 active_flags=END_STREAM, END_HEADERS>
2025.11.12 20:13:47 FINER io.helidon.http.http2.Http2LoggingFrameListener.recv VirtualThread[#59,[0x40285af3 0x2d461490] WebServer socket]/runnable@ForkJoinPool-1-worker-1: [0x40285af3 0x2d461490] recv 1: frame data, 
+--------+-------------------------------------------------+----------------+
|   index|  0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f |            data|
+--------+-------------------------------------------------+----------------+
|00000000| 82 87 41 8a a0 e4 1d 13 9d 09 b8 f0 1e 0f 04 83 |..A. ä....¸ð....|
|00000010| 60 75 7a 7a 88 25 b6 50 c3 cb ba b8 7f 53 03 2a |`uzz.%¶PÃ˺¸.S.*|
|00000020| 2f 2a                                           |/*              |
+--------+-------------------------------------------------+----------------+

2025.11.12 20:13:47 FINER io.helidon.http.http2.Http2LoggingFrameListener.recv VirtualThread[#59,[0x40285af3 0x2d461490] WebServer socket]/runnable@ForkJoinPool-1-worker-1: [0x40285af3 0x2d461490] recv 1: headers:
PseudoHeaders{authority='localhost:8081', method=GET, path='/any', scheme='https', status=null}
Accept: */*
User-Agent: curl/8.7.1