RabbitMQ 3.5.2 发布，AMQP 消息服务器
#深圳# 6月10日 亚马逊AWSome Day云计算免费培训报名中RabbitMQ 3.5.2 发布，此版本是个 bug 修复版本，主要改进如下：
服务器
增强：
Enhancements
[*] Improve integration with Docker (rabbitmq/rabbitmq-server#113). Problems which were previously worked around in the official Docker image, were fixed in RabbitMQ. In particular:
[*] Add a way to send log messages (both "normal" and sasl messages) to stdout (rabbitmq/rabbitmq-server#128).
[*] Do not try to use exec before su ... as su(1) forks a process anyway (since 3.5.0, rabbitmq/rabbitmq-server#129).
[*] Report a queue is under flow control only if it was in this situation in the last 1 second, instead of the last 5 seconds previously(rabbitmq/rabbitmq-server#138).
[*] Add a check to ensure the Mnesia directory is not shared with the PID file location or the plugin expansion directory (rabbitmq/rabbitmq-server#120). This should help users facing non-working automatic clustering.
Bug 修复
[*] Ensure the file handle cache remains under the memory high watermark when syncing a mirrored queue (since 2.0.0, rabbitmq/rabbitmq-server#134).
[*] Restore support for messages stored on disk with the previous x-death header format (since 3.5.1, rabbitmq/rabbitmq-server#152).
[*] Ensure passwords containing $ characters are properly escaped so they are not interpreted by the shell, when a password is changed using rabbitmqctl change_password (since 1.5.2, rabbitmq/rabbitmq-server#66).
更多改进请看这里：https://github.com/rabbitmq/rabbitmq-server/releases/tag/rabbitmq_v3_5_2
此版本现已提供下载：
[*] rabbitmq-server-3.5.2.exe
[*] rabbitmq-server-generic-unix-3.5.2.tar.gz
[*] rabbitmq-server-mac-standalone-3.5.2.tar.gz
[*] rabbitmq-server-windows-3.5.2.zip
[*] Source code (zip)
RabbitMQ 是由 LShift 提供的一个 Advanced Message Queuing Protocol (AMQP) 的开源实现，由以高性能、健壮以及可伸缩性出名的 Erlang 写成，因此也是继承了这些优点。
AMQP 里主要要说两个组件：Exchange 和 Queue （在 AMQP 1.0 里还会有变动），如下图所示，绿色的 X 就是 Exchange ，红色的是 Queue ，这两者都在 Server 端，又称作 Broker ，这部分是 RabbitMQ 实现的，而蓝色的则是客户端，通常有 Producer 和 Consumer 两种类型：
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