Haproxy 1.5.12 正式发布，此版本修复了一些 bugs，其中两个会因为一些特定的配置而发生崩溃。还有一些关于 RFC7230 方面的 bug 修复。此版本禁用了日志记录，响应 400/408 和空白连接错误计数器。其他改进：

  - BUG/MINOR: ssl: Display correct filename in error message
    - DOC: Fix L4TOUT typo in documentation
    - BUG/MEDIUM: Do not consider an agent check as failed on L7 error
    - BUG/MINOR: pattern: error message missing
    - BUG/MEDIUM: pattern: some entries are not deleted with case insensitive match
    - BUG/MEDIUM: buffer: one byte miss in buffer free space check
    - BUG/MAJOR: http: don't read past buffer's end in http_replace_value
    - BUG/MEDIUM: http: the function "(req|res)-replace-value" doesn't respect the HTTP syntax
    - BUG/MEDIUM: peers: correctly configure the client timeout
    - BUG/MINOR: compression: consider the expansion factor in init
    - BUG/MEDIUM: http: hdr_cnt would not count any header when called without name
    - BUG/MEDIUM: listener: don't report an error when resuming unbound listeners
    - BUG/MEDIUM: init: don't limit cpu-map to the first 32 processes only
    - BUG/MEDIUM: stream-int: always reset si->ops when si->end is nullified
    - BUG/MEDIUM: http: remove content-length from chunked messages
    - DOC: http: update the comments about the rules for determining transfer-length
    - BUG/MEDIUM: http: do not restrict parsing of transfer-encoding to HTTP/1.1
    - BUG/MEDIUM: http: incorrect transfer-coding in the request is a bad request
    - BUG/MEDIUM: http: remove content-length form responses with bad transfer-encoding
    - MEDIUM: http: restrict the HTTP version token to 1 digit as per RFC7230
    - MEDIUM: http: add option-ignore-probes to get rid of the floods of 408
    - BUG/MINOR: config: clear proxy->table.peers.p for disabled proxies
    - MINOR: stick-table: don't attach to peers in stopped state
    - MEDIUM: config: initialize stick-tables after peers, not before
    - MEDIUM: peers: add the ability to disable a peers section
    - DOC: document option http-ignore-probes
    - DOC: fix the comments about the meaning of msg->sol in HTTP
    - BUG/MEDIUM: http: wait for the exact amount of body bytes in wait_for_request_body
    - BUG/MAJOR: http: prevent risk of reading past end with balance url_param
    - DOC: update the doc on the proxy protocol

详细改进请看发行说明。

此版本现已提供下载：http://www.haproxy.org/download/1.5/src/haproxy-1.5.12.tar.gz。 

HAProxy提供高可用性、负载均衡以及基于TCP和HTTP应用的代理，支持虚拟主机， 它是免费、快速并且可靠的一种解决方案。HAProxy特别适用于那些负载特大的web站点， 这些站点通常又需要会话保持或七层处理。HAProxy运行在当前的硬件上，完全可以支持数以万计的并发连接。并且它的运行模式使得它可以很简单安全的整 合进您当前的架构中， 同时可以保护你的web服务器不被暴露到网络上。

下图是HAProxy的架构：