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HAProxy - Load balancer
3ad5d31bdf
A subtle bug was introduced with H2 on the backend. RFC7540 states that an attempt to create a stream on an ID not higher than the max known is a connection error. This was translated into rejecting HEADERS frames for closed streams. But with H2 on the backend, if the client aborts and causes an RST_STREAM to be emitted, the stream is effectively closed, and if/once the server responds, it starts by emitting a HEADERS frame with this ID thus it is interpreted as a connection error. This test must of course consider the side the mux is installed on and not take this for a connection error on responses. The effect is that an aborted stream on an outgoing H2 connection, for example due to a client stopping a transfer with option abortonclose set, would lead to an abort of all other streams. In the logs, this appears as one or several CD-- line(s) followed by one or several SD-- lines which are victims. Thanks to Luke Seelenbinder for reporting this problem and providing enough elements to help understanding how to reproduce it. This fix must be backported to 1.9. |
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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 - 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)