RabbitMQ 3.6.6 Milestone 5 發布，AMQP消息服務器

jopen 8年前發布 | 12K 次閱讀 RabbitMQ AMQP 中間件

 

        RabbitMQ是實現AMQP（高級消息隊列協議）的消息中間件的一種，最初起源于金融系統，用于在分布式系統中存儲轉發消息，在易用性、擴展性、高可用性等方面表現不俗。消息中間件主要用于組件之間的解耦，消息的發送者無需知道消息使用者的存在，反之亦然。

        AMQP 里主要要說兩個組件：Exchange 和 Queue （在 AMQP 1.0 里還會有變動），如下圖所示，綠色的 X 就是 Exchange ，紅色的是 Queue ，這兩者都在 Server 端，又稱作 Broker ，這部分是 RabbitMQ 實現的，而藍色的則是客戶端，通常有 Producer 和 Consumer 兩種類型。

 

更新日志

Bug 修復

  • Changing queue mode to lazy could block queue process in certain circumstances.
  • GitHub issue: rabbitmq-server#850
  • Mirroring implementation didn't handle certain internal protocol messages arriving out of order.
  • GitHub issue: rabbitmq-server#922
  • Mirror set changes weren't handled gracefully in certain circumstances (e.g. in the middle of a mirror promotion).
  • GitHub issue: rabbitmq-server#914
  • Mirrored queue could terminate after promotion if HA policy was reapplied during sync 
  • GitHub issue: rabbitmq-server#803
  • Autoheal partition handling mode could run into a multi-node deadlock
  • GitHub issue: rabbitmq-server/issues/928
  • Queue mirror group membership now correctly handles certain partial partition cases.
  • GitHub issues: rabbitmq-server#950,
  • rabbitmq-server#953
  • Eager queue sync will now stop as soon as a mirror shutdown/unavailability is detected.
  • GitHub issue: rabbitmq-server#975
  • Lazy queues now trigger runtime GC significantly less frequently, making moving data to the message store more efficient.
  • GitHub issue: rabbitmq-server#973
  • rabbitmqctl and server startup could be affected by some DNS configurations.
  • GitHub issue: rabbitmq-server#890
  • RPM package was split into two: for CentOS 6 and 7. The latter includes systemd support.
  • GitHub issue: rabbitmq-server#932
  • Workaround for Erlang/OTP bug OTP-13425 where crash dump generation failed on UNIX platforms.
  • GitHub issue: rabbitmq-server#956

增強功能

  • Inter-node traffic buffer increased to 32 MB by default, configurable withRABBITMQ_DISTRIBUTION_BUFFER_SIZE (in kilobytes).
  • This improves network bandwidth utilization for inter-node traffic and reduces the probability of spurious network partitions due to latency spikes caused by the buffer being full.
  • GitHub issue: rabbitmq-server#908
  • Default flow control settings were increased to {200, 100}. This helps with consumer throughput in some cases. The value still can be configured using the rabbit.credit_flow_default_creditsetting.
  • GitHub issue: rabbitmq-server#949

  • rabbitmqctl list_queues now has more filtering options.

    GitHub issue: rabbitmq-server#851

  • RABBITMQ_IGNORE_SIGINT is a new environment variable that lets the user disable the +B VM flag that is known to have issues in Erlang 18.x series (prevents crash dumps from being produced).
  • GitHub issue: rabbitmq-server#956
  • The pg2_fixed module is now replaced by the standard pg2 from a newer Erlang/OTP release.
  • GitHub issue: rabbitmq-server#980

MQTT插件

Bug 修復

  • Authentication with correct username but omitted password succeeded when TLS/x509 certificate wasn't provided by the client.
  • GitHub issue: rabbitmq-mqtt#96

JMS Topic Exchange Plugin

Bug Fixes

  • The plugin no longer tries to check if JMS client's version is identical/compatible.
    This prevented certain legitimate use cases, such as exchange declaration over HTTP API, to fail.

    GitHub issue: rabbitmq-jms-topic-exchange#9

Java客戶端

增強功能

  • com.rabbitmq.client.AddressResolver is a new interface that can be used to "expand" endpoints into groups of IP addresses, e.g. to a list of IP addresses resolved from a DNS record.
  • GitHub issue: rabbitmq-java-client#153

  • Building on the new AddressResolver interface, the client now includes a resolver that uses DNS SVR records to discover endpoints.

    GitHub issue: rabbitmq-java-client#104

  • com.rabbitmq.client.BuiltinExchangeType is an enum that contains built-in exchange types.

    GitHub issue: rabbitmq-java-client#150

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