f62d020140
When a primary cache hit has a Vary secondary_key_signature, the code calls retain_entry() and shctx_row_detach() before performing the secondary lookup. If get_secondary_entry() returns NULL (no stored variant matches), res is set to NULL and the function falls through to return ACT_RET_CONT without calling release_entry() or shctx_row_reattach(). Each such request leaks one refcount and pins one shctx row permanently, eventually exhausting the cache if this happens to all objects. This is visible when requesting a secondary key covered by vary for an object that is already stored without that key. "show cache" then shows the object's refcount increasing after each request. In order to fix this we must do like when no secondary key could be built and release everything. We only reattach to the row if we previously detached. The issue was introduced in 2.4 with commit |
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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.