HAProxy known bugs for maintenance branch 2.6 : 0

This is maintenance branch 2.6 whose latest version is 2.6.19. 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. In short, if you are running any 2.6 version other than 2.6.19, you're running with known bugs.

Quick links

full changelog for 2.6 : here
browse history for 2.6 : here

Versions available in this branch

This branch contains the following releases :

Date Version Comment

2024-09-19 2.6.19 ⇐ last

2024-06-18 2.6.18

2024-04-05 2.6.17

2023-12-13 2.6.16

2023-08-09 2.6.15

2023-06-09 2.6.14

2023-05-02 2.6.13

2023-03-28 2.6.12

2023-03-17 2.6.11

2023-03-10 2.6.10

2023-02-14 2.6.9

2023-01-24 2.6.8

2022-12-02 2.6.7

2022-09-22 2.6.6

2022-09-03 2.6.5

2022-08-22 2.6.4

2022-08-19 2.6.3

2022-07-22 2.6.2

2022-06-21 2.6.1

2022-05-31 2.6.0

Date	Version	Comment
2024-09-19	2.6.19	⇐ last
2024-06-18	2.6.18
2024-04-05	2.6.17
2023-12-13	2.6.16
2023-08-09	2.6.15
2023-06-09	2.6.14
2023-05-02	2.6.13
2023-03-28	2.6.12
2023-03-17	2.6.11
2023-03-10	2.6.10
2023-02-14	2.6.9
2023-01-24	2.6.8
2022-12-02	2.6.7
2022-09-22	2.6.6
2022-09-03	2.6.5
2022-08-22	2.6.4
2022-08-19	2.6.3
2022-07-22	2.6.2
2022-06-21	2.6.1
2022-05-31	2.6.0

Fixes for known bugs pending in this branch since the last release (2.6.19)

These fixes have already been queued for the next 2.6 release but no version was released with them yet. Note that fixes are backported several at a time from the development branch to maintenance branches, and the absence of a fix here doesn't mean none will be issued soon.

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 the latest version of this branch by category :

Total CRITICAL MAJOR MEDIUM MINOR

0 0 0 0 0

Total	CRITICAL	MAJOR	MEDIUM	MINOR
0	0	0	0	0

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

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

Known bugs fixed in the development branch after the last commit in this branch

It is important to understand that not all of these commits are necessarily relevant to this version, but clicking on them will show the bug description. All fixes are made first in the development branch and then backported to the maintenance branches. This ensures no fix is lost when upgrading. If a fix was marked for backporting to this branch and is not there yet, it's likely that it is still missing. Do not hesitate to ask on the haproxy mailing list if you feel like a fix has been skipped.

Date Subject

2024-10-22 DEBUG: mux-h1: Add debug counters to track some errors

2024-10-22 DEBUG: stream: Add debug counters to track some client/server aborts

2024-10-22 BUG/MINOR: stconn: Pretend the SE have more data to deliver on abortonclose

2024-10-22 BUG/MEDIUM: mux-h2: Remove H2S from send list if data are sent via 0-copy FF

2024-10-22 BUG/MEDIUM: stats-html: Never dump more data than expected during 0-copy FF

2024-10-21 MEDIUM: debug: add match counters for BUG_ON/WARN_ON/CHECK_IF

2024-10-21 CLEANUP: debug: make the BUG_ON() macros check the condition in the outer one

2024-10-21 BUG/MINOR: mux-quic: do not close STREAM with empty FIN if no data sent

2024-10-21 BUG/MINOR: mworker: fix mworker-max-reloads parser

2024-10-18 BUG/MINOR: sample: free err2 in smp_resolve_args for type ARGT_REG

2024-10-17 CLEANUP: http_ext: remove useless BUG_ON() in http_handle_xot_header()

2024-10-17 BUG/MEDIUM: quic: avoid freezing 0RTT connections

2024-10-17 BUG/MINOR: quic: avoid leaking post handshake frames

2024-10-17 BUG/MAJOR: filters/htx: Add a flag to state the payload is altered by a filter

2024-10-17 BUG/MEDIUM: stconn: Check FF data of SC to perform a shutdown in sc_notify()

2024-10-17 BUG/MINOR: http-ana: Don't report a server abort if response payload is invalid

2024-10-17 BUG/MEDIUM: stconn: Wait iobuf is empty to shut SE down during a check send

2024-10-17 BUG/MINOR: resolvers/mworker: missing default resolvers in mworker mode

2024-10-17 BUG/MEDIUM: mworker/httpclient: initialization skipped by accident in mworker mode

2024-10-17 BUG/MINOR: httpclient: return NULL when no proxy available during httpclient_new()

2024-10-16 BUG/MINOR: mworker: fix memory leak due to master-worker fork

2024-10-16 DEBUG: mux-h2/flags: add H2_CF_DEM_RXBUF & H2_SF_EXPECT_RXDATA for the decoder

2024-10-16 BUG/MEDIUM: queue: make sure never to queue when there's no more served conns

2024-10-16 BUG/MEDIUM: server: server stuck in maintenance after FQDN change

2024-10-16 BUG/MEDIUM: quic: support wait-for-handshake

2024-10-16 BUG/MINOR: stream: unblock stream on wait-for-handshake completion

2024-10-12 BUG/MINOR: mux-h2/traces: present the correct buffer for trailers errors traces

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

2024-10-09 BUG/MEDIUM: quic: properly decount out-of-order ACK on stream release

2024-10-09 BUG/MINOR: quic: fix discarding of already stored out-of-order ACK

2024-10-08 BUG/MEDIUM: hlua: properly handle sample func errors in hlua_run_sample_{fetch,conv}()

2024-10-08 BUG/MEDIUM: hlua: make hlua_ctx_renew() safe

2024-10-04 BUG/MINOR: stats: Fix the name for the total number of streams created

2024-10-04 BUG/MAJOR: mux-quic: do not crash on empty STREAM frame emission

2024-10-02 BUG/MINOR: quic: fix trace on releasing STREAM frame after ack

2024-10-02 BUG/MINOR: mux-quic: fix crash on qcc_init() early return

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

2024-10-01 BUG/MEDIUM: queue: always dequeue the backend when redistributing the last server

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

2024-09-30 BUG/MINOR: mcli: Pretend the mux have more data to deliver between two commands

2024-09-27 BUG/MINOR: queue: make sure that maintenance redispatches server queue

2024-09-27 BUG/MINOR: server: make sure the HMAINT state is part of MAINT

2024-09-27 BUG/MEDIUM: stream: make stream_shutdown() async-safe

2024-09-27 Revert "BUG/MINOR: server: shut down streams under thread isolation"

2024-09-25 BUG/MEDIUM: cli: Deadlock when setting frontend maxconn

2024-09-24 BUG/MEDIUM: cli: Be sure to catch immediate client abort

2024-09-21 BUG/MINOR: proxy: also make the cli and resolvers use the global name

2024-09-21 BUG/MINOR: server: shut down streams under thread isolation

2024-09-20 BUG/MINOR: cfgparse: detect another uncaught case of duplicate defaults

Date	Subject
2024-10-22	DEBUG: mux-h1: Add debug counters to track some errors
2024-10-22	DEBUG: stream: Add debug counters to track some client/server aborts
2024-10-22	BUG/MINOR: stconn: Pretend the SE have more data to deliver on abortonclose
2024-10-22	BUG/MEDIUM: mux-h2: Remove H2S from send list if data are sent via 0-copy FF
2024-10-22	BUG/MEDIUM: stats-html: Never dump more data than expected during 0-copy FF
2024-10-21	MEDIUM: debug: add match counters for BUG_ON/WARN_ON/CHECK_IF
2024-10-21	CLEANUP: debug: make the BUG_ON() macros check the condition in the outer one
2024-10-21	BUG/MINOR: mux-quic: do not close STREAM with empty FIN if no data sent
2024-10-21	BUG/MINOR: mworker: fix mworker-max-reloads parser
2024-10-18	BUG/MINOR: sample: free err2 in smp_resolve_args for type ARGT_REG
2024-10-17	CLEANUP: http_ext: remove useless BUG_ON() in http_handle_xot_header()
2024-10-17	BUG/MEDIUM: quic: avoid freezing 0RTT connections
2024-10-17	BUG/MINOR: quic: avoid leaking post handshake frames
2024-10-17	BUG/MAJOR: filters/htx: Add a flag to state the payload is altered by a filter
2024-10-17	BUG/MEDIUM: stconn: Check FF data of SC to perform a shutdown in sc_notify()
2024-10-17	BUG/MINOR: http-ana: Don't report a server abort if response payload is invalid
2024-10-17	BUG/MEDIUM: stconn: Wait iobuf is empty to shut SE down during a check send
2024-10-17	BUG/MINOR: resolvers/mworker: missing default resolvers in mworker mode
2024-10-17	BUG/MEDIUM: mworker/httpclient: initialization skipped by accident in mworker mode
2024-10-17	BUG/MINOR: httpclient: return NULL when no proxy available during httpclient_new()
2024-10-16	BUG/MINOR: mworker: fix memory leak due to master-worker fork
2024-10-16	DEBUG: mux-h2/flags: add H2_CF_DEM_RXBUF & H2_SF_EXPECT_RXDATA for the decoder
2024-10-16	BUG/MEDIUM: queue: make sure never to queue when there's no more served conns
2024-10-16	BUG/MEDIUM: server: server stuck in maintenance after FQDN change
2024-10-16	BUG/MEDIUM: quic: support wait-for-handshake
2024-10-16	BUG/MINOR: stream: unblock stream on wait-for-handshake completion
2024-10-12	BUG/MINOR: mux-h2/traces: present the correct buffer for trailers errors traces
2024-10-10	BUG/MEDIUM: mux-quic: ensure timeout server is active for short requests
2024-10-09	BUG/MEDIUM: quic: properly decount out-of-order ACK on stream release
2024-10-09	BUG/MINOR: quic: fix discarding of already stored out-of-order ACK
2024-10-08	BUG/MEDIUM: hlua: properly handle sample func errors in hlua_run_sample_{fetch,conv}()
2024-10-08	BUG/MEDIUM: hlua: make hlua_ctx_renew() safe
2024-10-04	BUG/MINOR: stats: Fix the name for the total number of streams created
2024-10-04	BUG/MAJOR: mux-quic: do not crash on empty STREAM frame emission
2024-10-02	BUG/MINOR: quic: fix trace on releasing STREAM frame after ack
2024-10-02	BUG/MINOR: mux-quic: fix crash on qcc_init() early return
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
2024-10-01	BUG/MEDIUM: queue: always dequeue the backend when redistributing the last server
2024-10-01	BUG/MINOR: cfgparse-global: fix allowed args number for setenv
2024-09-30	BUG/MINOR: mcli: Pretend the mux have more data to deliver between two commands
2024-09-27	BUG/MINOR: queue: make sure that maintenance redispatches server queue
2024-09-27	BUG/MINOR: server: make sure the HMAINT state is part of MAINT
2024-09-27	BUG/MEDIUM: stream: make stream_shutdown() async-safe
2024-09-27	Revert "BUG/MINOR: server: shut down streams under thread isolation"
2024-09-25	BUG/MEDIUM: cli: Deadlock when setting frontend maxconn
2024-09-24	BUG/MEDIUM: cli: Be sure to catch immediate client abort
2024-09-21	BUG/MINOR: proxy: also make the cli and resolvers use the global name
2024-09-21	BUG/MINOR: server: shut down streams under thread isolation
2024-09-20	BUG/MINOR: cfgparse: detect another uncaught case of duplicate defaults

Back to the list of branches and versions
Back to the HAProxy page