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When a stream is interrupted by the client before the full answer is stored in the cache, we end up with an incomplete entry in the cache that cannot be overwritten until it "naturally" expires. In such a case, we call the cache filter's cache_store_strm_deinit callback without ever calling cache_store_http_end which means that the 'complete' flag is never set on the concerned cache_entry. This patch adds a check on the 'complete' flag in the strm_deinit callback and removes the entry from the cache if it is incomplete. A way to exhibit this bug is to try to get the same "big" response on multiple clients at the same time thanks to h2load for instance, and to interrupt the client side before the answer can be fully stored in the cache. This patch can be backported up to 2.4 but it will need some rework starting with branch 2.8 because of the latest cache changes. |
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The HAProxy documentation has been split into a number of different files for ease of use. 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)