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A connection freeze may occur if a QCS is released before transmitting any data. This can happen when an error is detected early by the stream, for example during HTTP response headers encoding, forcing the whole connection closure. In this case, a connection error is registered by the QUIC MUX to the lower layer. MUX is then release and xprt layer is notified to prepare CONNECTION_CLOSE emission. However, this is prevented because quic_conn streams tree is not empty as it contains the qc_stream_desc previously attached to the failed QCS instance. The connection will freeze until QUIC idle timeout. This situation is caused by an omission during qc_stream_desc release operation. In the described situation, qc_stream_desc current buffer is empty and can thus by removed, which is the purpose of this patch. This unblocks this previously failed situation, with qc_stream_desc removal from quic_conn tree. This issue can be reproduced by modifying H3/QPACK code to return an early error during HEADERS response processing. This must be backported up to 2.6, after a period of observation.
HAProxy
HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Installation
The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.
Getting help
The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.
The issue tracker is only for bug reports or feature requests.
Documentation
The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.
Please refer to the following files depending on what you're looking for:
- INSTALL for instructions on how to build and install HAProxy
- BRANCHES to understand the project's life cycle and what version to use
- LICENSE for the project's license
- CONTRIBUTING for the process to follow to submit contributions
The more detailed documentation is located into the doc/ directory:
- doc/intro.txt for a quick introduction on HAProxy
- doc/configuration.txt for the configuration's reference manual
- doc/lua.txt for the Lua's reference manual
- doc/SPOE.txt for how to use the SPOE engine
- doc/network-namespaces.txt for how to use network namespaces under Linux
- doc/management.txt for the management guide
- doc/regression-testing.txt for how to use the regression testing suite
- doc/peers.txt for the peers protocol reference
- doc/coding-style.txt for how to adopt HAProxy's coding style
- doc/internals for developer-specific documentation (not all up to date)
License
HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.