Bug ID 932033: Chunked response may have DATA frame with END_STREAM prematurely

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1

Fixed In:
15.1.2, 14.1.4

Opened: Jul 29, 2020

Severity: 3-Major


When an HTTP/2 profile is configured on the client side, chunked responses are always sent unchunked. When a connection to a client is congested, BIG-IP systems may send the END_STREAM flag before transmitting a whole payload.


A browser may not receive the whole payload, or it may not recognize that the payload has been delivered fully (partially prior to the DATA frame with END_STREAM flag, partially after the frame).


-- A virtual server with an HTTP/2 profile configured on the client side. -- A server responds with a chunked response.


Configure an HTTP profile on the client side with a value of 'unchunk' on the response-chunking option.

Fix Information

BIG-IP systems no longer send a DATA frame with END_STREAM flag prematurely when a connection to a client is congested.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips