HAProxy known bugs for version v2.9.11 (maintenance branch 2.9) : 40

This version (2.9.11) is a release belonging to maintenance branch 2.9 whose latest version is 2.9.12. If your version is not the last one in the maintenance branch, you are missing fixes for known bugs, and by not updating you are needlessly taking the responsibility for the risk of unexpected service outages and exposing your web site to possible security issues.

The HAProxy development team takes a great care of maintaining stable versions so that all users can apply bug fixes without having to take the risk of upgrading to a new branch. In turn users are expected to apply the fixes when the development team estimates that they were worth being backported to stable branches.

Quick links

full changelog for 2.9 : here
browse history for 2.9 : here

Other versions in the same branch

This branch contains the following releases :

Date Version Comment

2024-11-08 2.9.12 ⇐ last

2024-09-19 2.9.11 ⇐ yours

2024-09-03 2.9.10

2024-06-14 2.9.9

2024-06-11 2.9.8

2024-04-05 2.9.7

2024-02-26 2.9.6

2024-02-15 2.9.5

2024-01-31 2.9.4

2024-01-18 2.9.3

2024-01-11 2.9.2

2023-12-15 2.9.1

2023-12-05 2.9.0

Date	Version	Comment
2024-11-08	2.9.12	⇐ last
2024-09-19	2.9.11	⇐ yours
2024-09-03	2.9.10
2024-06-14	2.9.9
2024-06-11	2.9.8
2024-04-05	2.9.7
2024-02-26	2.9.6
2024-02-15	2.9.5
2024-01-31	2.9.4
2024-01-18	2.9.3
2024-01-11	2.9.2
2023-12-15	2.9.1
2023-12-05	2.9.0

Known bugs affecting this version, and already fixed in the maintenance branch

These fixes have already been queued for a more recent 2.9 version. Some of them might have already been released in a more recent version than yours, and other ones might still be pending in the maintenance branch for a future release. The list may be empty if you're already on the latest version and no new fix was backported.

Bugs are almost always tagged with a severity (some people forget the severity tag when the bug is minor). The following severities are used :

MINOR: the bug presents a limited impact and can easily be mitigated ; users rarely upgrade just for these ones ;
MEDIUM: the bug can cause some undesired behaviour and may require some tricky configuration changes to avoid hitting it ; users normally upgrade to get rid of them, or temporarily disable a functionality.
MAJOR: the bug affects short term reliability and cannot easily be worked around without a significant performance penalty or without a significant functional loss ; such bugs don't stay long in the queue without a release and users must plan an upgrade as soon as possible ;
CRITICAL: this one very rarely happens ; it indicates a short-term reliability or security issue for which there is no workaround. A release will be emitted for this fix even if it's alone and users are urged to upgrade immediately. Some distro maintainers might have been informed in advance in order to agree on a coordinated release date.

Total known bugs in this version by category :

Total CRITICAL MAJOR MEDIUM MINOR

40 0 1 19 20

Total	CRITICAL	MAJOR	MEDIUM	MINOR
40	0	1	19	20

Click on the subjects below to get the full description of the bug :

Merge date Subject - Severity (minor, medium, major, critical)

2024-11-13 BUG/MEDIUM: resolvers: Insert a non-executed resulution in front of the wait list

2024-11-13 BUG/MINOR: cli: don't show sockpairs in HAPROXY_CLI and HAPROXY_MASTER_CLI

2024-11-06 DEBUG: wdt: make the blocked traffic warning delay configurable

2024-11-06 DEBUG: cli: make it possible for "debug dev loop" to trigger warnings

2024-11-06 DEBUG: wdt: better detect apparently locked up threads and warn about them

2024-11-06 BUG/MINOR: http-ana: Report internal error if an action yields on a final eval

2024-11-06 BUG/MEDIUM: mux-h1: Fix how timeouts are applied on H1 connections

2024-11-06 BUG/MINOR: ssl/cli: 'set ssl cert' does not check the transaction name correctly

2024-11-06 BUG/MINOR: trace: stop rewriting argv with -dt

2024-10-24 BUG/MEDIUM: server: fix race on servers_list during server deletion

2024-10-24 BUG/MINOR: stconn: Don't disable 0-copy FF if EOS was reported on consumer side

2024-10-24 BUG/MINOR: http-ana: Fix wrong client abort reports during responses forwarding

2024-10-24 BUG/MEDIUM: stconn: Report blocked send if sends are blocked by an error

2024-10-24 BUG/MINOR: server: fix dynamic server leak with check on failed init

2024-10-24 BUG/MINOR: mux-quic: do not close STREAM with empty FIN if no data sent

2024-10-23 BUG/MEDIUM: connection/http-reuse: fix address collision on unhandled address families

2024-10-23 BUG/MEDIUM: mux-h2: Remove H2S from send list if data are sent via 0-copy FF

2024-10-23 BUG/MINOR: mworker: fix mworker-max-reloads parser

2024-10-23 BUG/MEDIUM: quic: avoid freezing 0RTT connections

2024-10-23 BUG/MINOR: quic: avoid leaking post handshake frames

2024-10-23 BUG/MAJOR: filters/htx: Add a flag to state the payload is altered by a filter

2024-10-23 BUG/MEDIUM: stconn: Check FF data of SC to perform a shutdown in sc_notify()

2024-10-23 BUG/MINOR: http-ana: Don't report a server abort if response payload is invalid

2024-10-23 BUG/MEDIUM: stconn: Wait iobuf is empty to shut SE down during a check send

2024-10-23 BUG/MINOR: httpclient: return NULL when no proxy available during httpclient_new()

2024-10-23 BUG/MEDIUM: queue: make sure never to queue when there's no more served conns

2024-10-23 BUG/MEDIUM: mux-quic: ensure timeout server is active for short requests

2024-10-23 BUG/MEDIUM: hlua: properly handle sample func errors in hlua_run_sample_{fetch,conv}()

2024-10-23 BUG/MEDIUM: hlua: make hlua_ctx_renew() safe

2024-10-21 BUG/MEDIUM: server: server stuck in maintenance after FQDN change

2024-10-02 BUG/MINOR: http-ana: Disable fast-fwd for unfinished req waiting for upgrade

2024-10-02 BUG/MINOR: mux-h1: Fix condition to set EOI on SE during zero-copy forwarding

2024-10-02 BUG/MEDIUM: queue: always dequeue the backend when redistributing the last server

2024-10-02 BUG/MINOR: queue: make sure that maintenance redispatches server queue

2024-10-02 BUG/MEDIUM: stream: make stream_shutdown() async-safe

2024-10-01 BUG/MINOR: quic: prevent freeze after early QCS closure

2024-10-01 BUG/MEDIUM: quic: handle retransmit for standalone FIN STREAM

2024-10-01 BUG/MINOR: cfgparse-global: fix allowed args number for setenv

2024-10-01 BUG/MINOR: server: make sure the HMAINT state is part of MAINT

2024-10-01 BUG/MEDIUM: cli: Deadlock when setting frontend maxconn

2024-10-01 BUG/MEDIUM: mux-h1/mux-h2: Reject upgrades with payload on H2 side only

2024-10-01 BUG/MINOR: h2: reject extended connect for h2c protocol

2024-10-01 BUG/MINOR: h1: do not forward h2c upgrade header token

Merge date	Subject - Severity (minor, medium, major, critical)
2024-11-13	BUG/MEDIUM: resolvers: Insert a non-executed resulution in front of the wait list
2024-11-13	BUG/MINOR: cli: don't show sockpairs in HAPROXY_CLI and HAPROXY_MASTER_CLI
2024-11-06	DEBUG: wdt: make the blocked traffic warning delay configurable
2024-11-06	DEBUG: cli: make it possible for "debug dev loop" to trigger warnings
2024-11-06	DEBUG: wdt: better detect apparently locked up threads and warn about them
2024-11-06	BUG/MINOR: http-ana: Report internal error if an action yields on a final eval
2024-11-06	BUG/MEDIUM: mux-h1: Fix how timeouts are applied on H1 connections
2024-11-06	BUG/MINOR: ssl/cli: 'set ssl cert' does not check the transaction name correctly
2024-11-06	BUG/MINOR: trace: stop rewriting argv with -dt
2024-10-24	BUG/MEDIUM: server: fix race on servers_list during server deletion
2024-10-24	BUG/MINOR: stconn: Don't disable 0-copy FF if EOS was reported on consumer side
2024-10-24	BUG/MINOR: http-ana: Fix wrong client abort reports during responses forwarding
2024-10-24	BUG/MEDIUM: stconn: Report blocked send if sends are blocked by an error
2024-10-24	BUG/MINOR: server: fix dynamic server leak with check on failed init
2024-10-24	BUG/MINOR: mux-quic: do not close STREAM with empty FIN if no data sent
2024-10-23	BUG/MEDIUM: connection/http-reuse: fix address collision on unhandled address families
2024-10-23	BUG/MEDIUM: mux-h2: Remove H2S from send list if data are sent via 0-copy FF
2024-10-23	BUG/MINOR: mworker: fix mworker-max-reloads parser
2024-10-23	BUG/MEDIUM: quic: avoid freezing 0RTT connections
2024-10-23	BUG/MINOR: quic: avoid leaking post handshake frames
2024-10-23	BUG/MAJOR: filters/htx: Add a flag to state the payload is altered by a filter
2024-10-23	BUG/MEDIUM: stconn: Check FF data of SC to perform a shutdown in sc_notify()
2024-10-23	BUG/MINOR: http-ana: Don't report a server abort if response payload is invalid
2024-10-23	BUG/MEDIUM: stconn: Wait iobuf is empty to shut SE down during a check send
2024-10-23	BUG/MINOR: httpclient: return NULL when no proxy available during httpclient_new()
2024-10-23	BUG/MEDIUM: queue: make sure never to queue when there's no more served conns
2024-10-23	BUG/MEDIUM: mux-quic: ensure timeout server is active for short requests
2024-10-23	BUG/MEDIUM: hlua: properly handle sample func errors in hlua_run_sample_{fetch,conv}()
2024-10-23	BUG/MEDIUM: hlua: make hlua_ctx_renew() safe
2024-10-21	BUG/MEDIUM: server: server stuck in maintenance after FQDN change
2024-10-02	BUG/MINOR: http-ana: Disable fast-fwd for unfinished req waiting for upgrade
2024-10-02	BUG/MINOR: mux-h1: Fix condition to set EOI on SE during zero-copy forwarding
2024-10-02	BUG/MEDIUM: queue: always dequeue the backend when redistributing the last server
2024-10-02	BUG/MINOR: queue: make sure that maintenance redispatches server queue
2024-10-02	BUG/MEDIUM: stream: make stream_shutdown() async-safe
2024-10-01	BUG/MINOR: quic: prevent freeze after early QCS closure
2024-10-01	BUG/MEDIUM: quic: handle retransmit for standalone FIN STREAM
2024-10-01	BUG/MINOR: cfgparse-global: fix allowed args number for setenv
2024-10-01	BUG/MINOR: server: make sure the HMAINT state is part of MAINT
2024-10-01	BUG/MEDIUM: cli: Deadlock when setting frontend maxconn
2024-10-01	BUG/MEDIUM: mux-h1/mux-h2: Reject upgrades with payload on H2 side only
2024-10-01	BUG/MINOR: h2: reject extended connect for h2c protocol
2024-10-01	BUG/MINOR: h1: do not forward h2c upgrade header token

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