c0f6024854
As reported by Chris Staite in GH #3002, trying to yield from a Lua action during a client disconnect causes the script to be interrupted (which is expected) and an alert to be emitted with the error: "Lua function '%s': yield not allowed". While this error is well suited for cases where the yield is not expected at all (ie: when context doesn't allow it) and results from a yield misuse in the Lua script, it isn't the case when the yield is exceptionnally not available due to an abort or error in the request/response processing. Because of that we raise an alert but the user cannot do anything about it (the script is correct), so it is confusing and polluting the logs. In this patch we introduce the ACT_OPT_FINAL_EARLY flag which is a complementary flag to ACT_OPT_FIRST. This flag is set when the ACT_OPT_FIRST is set earlier than normal (due to error/abort). hlua_action() then checks for this flag to decide whether an error (alert) or a simple log message should be emitted when the yield is not available. It should solve GH #3002. Thanks to Chris Staite (@chrisstaite-menlo) for having reported the issue and suggested a solution. |
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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.