Bug ID 850145: Connection hangs since pipelined HTTP requests are incorrectly queued in the proxy and not processed

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:
16.0.0, 15.1.2,

Opened: Nov 14, 2019

Severity: 3-Major


First HTTP request on a connection creates a connection to the server. Subsequent pipelined requests should be processed and use the established connection to the server. However, the requests were queued in the proxy and not processed resulting in connection hang.


Connection hangs and is eventually reset.


- HTTP or HTTP/2 virtual server with httprouter profile. - HTTP/1.1 connections with the client and server. - Pipelined HTTP requests.


No workaround.

Fix Information

If a connection to the server has been established, pipelined requests are now processed immediately and not queued.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips