{"id":7635,"date":"2022-04-22T14:18:03","date_gmt":"2022-04-22T21:18:03","guid":{"rendered":"https:\/\/www.xh86.me\/?p=7635"},"modified":"2022-04-22T14:18:03","modified_gmt":"2022-04-22T21:18:03","slug":"%e8%ad%a6%e6%83%95%ef%bc%81%e8%bf%99-8-%e4%b8%aa%e5%9c%ba%e6%99%af%e4%b8%8b-rocketmq-%e4%bc%9a%e5%8f%91%e7%94%9f%e6%b5%81%e9%87%8f%e6%8e%a7%e5%88%b6","status":"publish","type":"post","link":"https:\/\/www.xh86.me\/?p=7635","title":{"rendered":"\u8b66\u60d5\uff01\u8fd9 8 \u4e2a\u573a\u666f\u4e0b RocketMQ \u4f1a\u53d1\u751f\u6d41\u91cf\u63a7\u5236"},"content":{"rendered":"
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<\/section>\n
\n

\u5728\u4f7f\u7528 RocketMQ \u7684\u8fc7\u7a0b\u4e2d\uff0c\u6709\u65f6\u5019\u6211\u4eec\u4f1a\u770b\u5230\u4e0b\u9762\u7684\u65e5\u5fd7\uff1a<\/p>\n

[TIMEOUT_CLEAN_QUEUE]broker\u00a0busy,\u00a0start\u00a0flow\u00a0control\u00a0for<\/span>\u00a0a\u00a0while<\/span>,\u00a0period\u00a0in<\/span>\u00a0queue:\u00a0206ms,\u00a0size\u00a0of\u00a0queue:\u00a05\r\n<\/code><\/pre>\n
\u8fd9\u662f\u56e0\u4e3a RocketMQ \u89e6\u53d1\u4e86\u6d41\u91cf\u63a7\u5236\u3002\u4eca\u5929\u6211\u4eec\u6765\u804a\u4e00\u804a\u54ea\u4e9b\u573a\u666f\u4e0b RocketMQ \u4f1a\u89e6\u53d1\u6d41\u91cf\u63a7\u5236\u3002<\/p>\n
<\/div><\/figure>\n
\u5982\u4e0a\u56fe\uff0c\u751f\u4ea7\u8005\u628a\u6d88\u606f\u5199\u5165 Broker\uff0cConsumer \u4ece Broker \u62c9\u53d6\u6d88\u606f\u3002Broker \u662f RocketMQ \u7684\u6838\u5fc3 \uff0c\u89e6\u53d1\u6d41\u91cf\u63a7\u5236\u4e3b\u8981\u5c31\u662f\u4e3a\u4e86\u9632\u6b62 Broker \u538b\u529b\u8fc7\u5927\u800c\u5b95\u673a\u3002<\/p>\n
1 Broker \u6d41\u63a7<\/span><\/h2>\n
1.1 broker busy<\/h3>\n
RockerMQ \u9ed8\u8ba4\u91c7\u7528\u5f02\u6b65\u5237\u76d8\u7b56\u7565\uff0cProducer \u628a\u6d88\u606f\u53d1\u9001\u5230 Broker \u540e\uff0cBroker \u4f1a\u5148\u628a\u6d88\u606f\u5199\u5165 Page Cache\uff0c\u5237\u76d8\u7ebf\u7a0b\u5b9a\u65f6\u5730\u628a\u6570\u636e\u4ece Page Cache \u5237\u5230\u78c1\u76d8\u4e0a\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n
<\/div><\/figure>\n
\u90a3 broker busy \u662f\u600e\u4e48\u5bfc\u81f4\u7684\u5462\uff1f<\/p>\n
Broker \u9ed8\u8ba4\u662f\u5f00\u542f\u5feb\u901f\u5931\u8d25\u7684\uff0c\u5904\u7406\u903b\u8f91\u7c7b\u662f BrokerFastFailure\uff0c\u8fd9\u4e2a\u7c7b\u4e2d\u6709\u4e00\u4e2a\u5b9a\u65f6\u4efb\u52a1\u7528\u6765\u6e05\u7406\u8fc7\u671f\u7684\u8bf7\u6c42\uff0c\u6bcf 10 ms \u6267\u884c\u4e00\u6b21\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
public<\/span>\u00a0void<\/span>\u00a0start<\/span>()<\/span>\u00a0<\/span>{\r\n\u00a0\u00a0\u00a0\u00a0this<\/span>.scheduledExecutorService.scheduleAtFixedRate(new<\/span>\u00a0Runnable()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0@Override<\/span>\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0void<\/span>\u00a0run<\/span>()<\/span>\u00a0<\/span>{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0(brokerController.getBrokerConfig().isBrokerFastFailureEnable())\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0cleanExpiredRequest();\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\r\n\u00a0\u00a0\u00a0\u00a0},\u00a01000<\/span>,\u00a010<\/span>,\u00a0TimeUnit.MILLISECONDS);\r\n}\r\n<\/code><\/pre>\n
    \n
  1. \n
    Page Cache \u7e41\u5fd9<\/section>\n<\/li>\n<\/ol>\n
    \u6e05\u7406\u8fc7\u671f\u8bf7\u6c42\u4e4b\u524d\u9996\u5148\u4f1a\u5224\u65ad Page Cache \u662f\u5426\u7e41\u5fd9\uff0c\u5982\u679c\u7e41\u5fd9\uff0c\u5c31\u4f1a\u7ed9 Producer \u8fd4\u56de\u4e00\u4e2a\u7cfb\u7edf\u7e41\u5fd9\u7684\u72b6\u6001\u7801\uff08code=2\uff0cremark=”[PCBUSY_CLEAN_QUEUE]broker busy, start flow control for a while, period in queue: %sms, size of queue: %d”\uff09<\/strong><\/span>\uff0c\u4e5f\u5c31\u662f\u672c\u6587\u5f00\u5934\u7684\u5f02\u5e38\u65e5\u5fd7\u3002\u90a3\u600e\u4e48\u5224\u65ad Page Cache \u7e41\u5fd9\u5462\uff1fBroker \u6536\u5230\u4e00\u6761\u6d88\u606f\u540e\u4f1a\u8ffd\u52a0\u5230 Page Cache \u6216\u8005\u5185\u5b58\u6620\u5c04\u6587\u4ef6\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u9996\u5148\u83b7\u53d6\u4e00\u4e2a CommitLog \u5199\u5165\u9501\uff0c\u5982\u679c\u6301\u6709\u9501\u7684\u65f6\u95f4\u5927\u4e8e osPageCacheBusyTimeOutMills\uff08\u9ed8\u8ba4 1s\uff0c\u53ef\u4ee5\u914d\u7f6e\uff09\uff0c\u5c31\u8ba4\u4e3a Page Cache \u7e41\u5fd9\u3002\u5177\u4f53\u4ee3\u7801\u89c1 DefaultMessageStore \u7c7b isOSPageCacheBusy \u65b9\u6cd5\u3002<\/p>\n
      \n
    1. \n
      \u6e05\u7406\u8fc7\u671f\u8bf7\u6c42<\/section>\n<\/li>\n<\/ol>\n
      \u6e05\u7406\u8fc7\u671f\u8bf7\u6c42\u65f6\uff0c\u5982\u679c\u8bf7\u6c42\u7ebf\u7a0b\u7684\u521b\u5efa\u65f6\u95f4\u5230\u5f53\u524d\u7cfb\u7edf\u65f6\u95f4\u95f4\u9694\u5927\u4e8e waitTimeMillsInSendQueue\uff08\u9ed8\u8ba4 200ms\uff0c\u53ef\u4ee5\u914d\u7f6e\uff09\u5c31\u4f1a\u6e05\u7406\u8fd9\u4e2a\u8bf7\u6c42\uff0c\u7136\u540e\u7ed9 Producer \u8fd4\u56de\u4e00\u4e2a\u7cfb\u7edf\u7e41\u5fd9\u7684\u72b6\u6001\u7801\uff08code=2\uff0cremark=”[TIMEOUT_CLEAN_QUEUE]broker busy, start flow control for a while, period in queue: %sms, size of queue: %d”\uff09<\/strong><\/span><\/p>\n
      1.2 system busy<\/h3>\n
      \u8fd9\u4e2a\u5f02\u5e38\u5728 NettyRemotingAbstract#processRequestCommand \u65b9\u6cd5\uff0c<\/p>\n
        \n
      1. \n
        \u62d2\u7edd\u8bf7\u6c42<\/section>\n<\/li>\n<\/ol>\n
        \u5982\u679c NettyRequestProcessor \u62d2\u7edd\u4e86\u8bf7\u6c42\uff0c\u5c31\u4f1a\u7ed9 Producer \u8fd4\u56de\u4e00\u4e2a\u7cfb\u7edf\u7e41\u5fd9\u7684\u72b6\u6001\u7801\uff08code=2\uff0cremark=”[REJECTREQUEST]system busy, start flow control for a while”\uff09<\/strong><\/span>\u3002\u90a3\u4ec0\u4e48\u60c5\u51b5\u4e0b\u8bf7\u6c42\u4f1a\u88ab\u62d2\u7edd\u5462\uff1f\u770b\u4e0b\u9762\u8fd9\u6bb5\u4ee3\u7801\uff1a<\/p>\n
        \/\/SendMessageProcessor\u7c7b<\/span>\r\npublic<\/span>\u00a0boolean<\/span>\u00a0rejectRequest<\/span>()<\/span>\u00a0<\/span>{\r\n\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0this<\/span>.brokerController.getMessageStore().isOSPageCacheBusy()\u00a0||\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this<\/span>.brokerController.getMessageStore().isTransientStorePoolDeficient();\r\n}\r\n<\/code><\/pre>\n
        \u4ece\u4ee3\u7801\u4e2d\u53ef\u4ee5\u770b\u5230\uff0c\u8bf7\u6c42\u88ab\u62d2\u7edd\u7684\u60c5\u51b5\u6709\u4e24\u79cd\u53ef\u80fd\uff0c\u4e00\u4e2a\u662f Page Cache \u7e41\u5fd9\uff0c\u53e6\u4e00\u4e2a\u662f TransientStorePoolDeficient\u3002<\/p>\n
        \u8ddf\u8e2a isTransientStorePoolDeficient \u65b9\u6cd5\uff0c\u53d1\u73b0\u5224\u65ad\u4f9d\u636e\u662f\u5728\u5f00\u542f transientStorePoolEnable \u914d\u7f6e\u7684\u60c5\u51b5\u4e0b\uff0c\u662f\u5426\u8fd8\u6709\u53ef\u7528\u7684 ByteBuffer\u3002<\/p>\n
        \u6ce8\u610f\uff1a\u5728\u5f00\u542f transientStorePoolEnable \u7684\u60c5\u51b5\u4e0b\uff0c\u5199\u5165\u6d88\u606f\u65f6\u4f1a\u5148\u5199\u5165\u5806\u5916\u5185\u5b58\uff08DirectByteBuffer\uff09\uff0c\u7136\u540e\u5237\u5165 Page Cache\uff0c\u6700\u540e\u5237\u5165\u78c1\u76d8\u3002\u800c\u8bfb\u53d6\u6d88\u606f\u662f\u4ece Page Cache\uff0c\u8fd9\u6837\u53ef\u4ee5\u5b9e\u73b0\u8bfb\u5199\u5206\u79bb\uff0c\u907f\u514d\u8bfb\u5199\u90fd\u5728 Page Cache \u5e26\u6765\u7684\u95ee\u9898<\/strong><\/span>\u3002\u5982\u4e0b\u56fe\uff1a<\/p>\n
        <\/div><\/figure>\n
          \n
        1. \n
          \u7ebf\u7a0b\u6c60\u62d2\u7edd<\/section>\n<\/li>\n<\/ol>\n
          Broker \u6536\u5230\u8bf7\u6c42\u540e\uff0c\u4f1a\u628a\u5904\u7406\u903b\u8f91\u5c01\u88c5\u6210\u5230 Runnable \u4e2d\uff0c\u7531\u7ebf\u7a0b\u6c60\u6765\u63d0\u4ea4\u6267\u884c\uff0c\u5982\u679c\u7ebf\u7a0b\u6c60\u6ee1\u4e86\u5c31\u4f1a\u62d2\u7edd\u8bf7\u6c42\uff08\u8fd9\u91cc\u7ebf\u7a0b\u6c60\u4e2d\u961f\u5217\u7684\u5927\u5c0f\u9ed8\u8ba4\u662f 10000\uff0c\u53ef\u4ee5\u901a\u8fc7\u53c2\u6570 sendThreadPoolQueueCapacity \u8fdb\u884c\u914d\u7f6e\uff09\uff0c\u7ebf\u7a0b\u6c60\u62d2\u7edd\u540e\u4f1a\u629b\u51fa\u5f02\u5e38 RejectedExecutionException\uff0c\u7a0b\u5e8f\u6355\u83b7\u5230\u5f02\u5e38\u540e\uff0c\u4f1a\u5224\u65ad\u662f\u4e0d\u662f\u5355\u5411\u8bf7\u6c42\uff08OnewayRPC\uff09\uff0c\u5982\u679c\u4e0d\u662f\uff0c\u5c31\u4f1a\u7ed9 Producer \u8fd4\u56de\u4e00\u4e2a\u7cfb\u7edf\u7e41\u5fd9\u7684\u72b6\u6001\u7801\uff08code=2\uff0cremark=”[OVERLOAD]system busy, start flow control for a while”\uff09<\/strong><\/span><\/p>\n
          \u5224\u65ad OnewayRPC \u7684\u4ee3\u7801\u5982\u4e0b\uff0cflag = 2 \u6216\u8005 3 \u65f6\u662f\u5355\u5411\u8bf7\u6c42\uff1a<\/p>\n
          public<\/span>\u00a0boolean<\/span>\u00a0isOnewayRPC<\/span>()<\/span>\u00a0<\/span>{\r\n\u00a0\u00a0\u00a0\u00a0int<\/span>\u00a0bits\u00a0=\u00a01<\/span>\u00a0<<\u00a0RPC_ONEWAY;\r\n\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0(this<\/span>.flag\u00a0&\u00a0bits)\u00a0==\u00a0bits;\r\n}\r\n<\/code><\/pre>\n
          1.3 \u6d88\u606f\u91cd\u8bd5<\/h3>\n
          Broker \u53d1\u751f\u6d41\u91cf\u63a7\u5236\u7684\u60c5\u51b5\u4e0b\uff0c\u8fd4\u56de\u7ed9 Producer \u7cfb\u7edf\u7e41\u5fd9\u7684\u72b6\u6001\u7801\uff08code=2\uff09\uff0cProducer \u6536\u5230\u8fd9\u4e2a\u72b6\u6001\u7801\u662f\u4e0d\u4f1a\u8fdb\u884c\u91cd\u8bd5\u7684\u3002\u4e0b\u9762\u662f\u4f1a\u8fdb\u884c\u91cd\u8bd5\u7684\u54cd\u5e94\u7801\uff1a<\/p>\n
          \/\/DefaultMQProducer\u7c7b<\/span>\r\nprivate<\/span>\u00a0final<\/span>\u00a0Set<Integer>\u00a0retryResponseCodes\u00a0=\u00a0new<\/span>\u00a0CopyOnWriteArraySet<Integer>(Arrays.asList(\r\n\u00a0\u00a0\u00a0\u00a0ResponseCode.TOPIC_NOT_EXIST,\r\n\u00a0\u00a0\u00a0\u00a0ResponseCode.SERVICE_NOT_AVAILABLE,\r\n\u00a0\u00a0\u00a0\u00a0ResponseCode.SYSTEM_ERROR,\r\n\u00a0\u00a0\u00a0\u00a0ResponseCode.NO_PERMISSION,\r\n\u00a0\u00a0\u00a0\u00a0ResponseCode.NO_BUYER_ID,\r\n\u00a0\u00a0\u00a0\u00a0ResponseCode.NOT_IN_CURRENT_UNIT\r\n));\r\n<\/code><\/pre>\n
          2 Consumer \u6d41\u63a7<\/span><\/h2>\n
          DefaultMQPushConsumerImpl<\/span> \u7c7b\u4e2d\u6709 Consumer \u6d41\u63a7\u7684\u903b\u8f91\u00a0\u3002<\/p>\n
          2.1 \u7f13\u5b58\u6d88\u606f\u6570\u91cf\u8d85\u8fc7\u9608\u503c<\/h3>\n
          ProcessQueue \u4fdd\u5b58\u7684\u6d88\u606f\u6570\u91cf\u8d85\u8fc7\u9608\u503c\uff08\u9ed8\u8ba4 1000\uff0c\u53ef\u4ee5\u914d\u7f6e\uff09\uff0c\u6e90\u7801\u5982\u4e0b\uff1a<\/p>\n
          if<\/span>\u00a0(cachedMessageCount\u00a0>\u00a0this<\/span>.defaultMQPushConsumer.getPullThresholdForQueue())\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0this<\/span>.executePullRequestLater(pullRequest,\u00a0PULL_TIME_DELAY_MILLS_WHEN_FLOW_CONTROL);\r\n\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0((queueFlowControlTimes++\u00a0%\u00a01000<\/span>)\u00a0==\u00a00<\/span>)\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0log.warn(\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\"the\u00a0cached\u00a0message\u00a0count\u00a0exceeds\u00a0the\u00a0threshold\u00a0{},\u00a0so\u00a0do\u00a0flow\u00a0control,\u00a0minOffset={},\u00a0maxOffset={},\u00a0count={},\u00a0size={}\u00a0MiB,\u00a0pullRequest={},\u00a0flowControlTimes={}\"<\/span>,\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this<\/span>.defaultMQPushConsumer.getPullThresholdForQueue(),\u00a0processQueue.getMsgTreeMap().firstKey(),\u00a0processQueue.getMsgTreeMap().lastKey(),\u00a0cachedMessageCount,\u00a0cachedMessageSizeInMiB,\u00a0pullRequest,\u00a0queueFlowControlTimes);\r\n\u00a0\u00a0\u00a0\u00a0}\r\n\u00a0\u00a0\u00a0\u00a0return<\/span>;\r\n}\r\n<\/code><\/pre>\n
          2.2 \u7f13\u5b58\u6d88\u606f\u5927\u5c0f\u8d85\u8fc7\u9608\u503c<\/h3>\n
          ProcessQueue \u4fdd\u5b58\u7684\u6d88\u606f\u5927\u5c0f\u8d85\u8fc7\u9608\u503c\uff08\u9ed8\u8ba4 100M\uff0c\u53ef\u4ee5\u914d\u7f6e\uff09\uff0c\u6e90\u7801\u5982\u4e0b\uff1a<\/p>\n
          if<\/span>\u00a0(cachedMessageSizeInMiB\u00a0>\u00a0this<\/span>.defaultMQPushConsumer.getPullThresholdSizeForQueue())\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0this<\/span>.executePullRequestLater(pullRequest,\u00a0PULL_TIME_DELAY_MILLS_WHEN_FLOW_CONTROL);\r\n\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0((queueFlowControlTimes++\u00a0%\u00a01000<\/span>)\u00a0==\u00a00<\/span>)\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0log.warn(\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\"the\u00a0cached\u00a0message\u00a0size\u00a0exceeds\u00a0the\u00a0threshold\u00a0{}\u00a0MiB,\u00a0so\u00a0do\u00a0flow\u00a0control,\u00a0minOffset={},\u00a0maxOffset={},\u00a0count={},\u00a0size={}\u00a0MiB,\u00a0pullRequest={},\u00a0flowControlTimes={}\"<\/span>,\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this<\/span>.defaultMQPushConsumer.getPullThresholdSizeForQueue(),\u00a0processQueue.getMsgTreeMap().firstKey(),\u00a0processQueue.getMsgTreeMap().lastKey(),\u00a0cachedMessageCount,\u00a0cachedMessageSizeInMiB,\u00a0pullRequest,\u00a0queueFlowControlTimes);\r\n\u00a0\u00a0\u00a0\u00a0}\r\n\u00a0\u00a0\u00a0\u00a0return<\/span>;\r\n}\r\n<\/code><\/pre>\n
          2.3 \u7f13\u5b58\u6d88\u606f\u8de8\u5ea6\u8d85\u8fc7\u9608\u503c<\/h3>\n
          \u5bf9\u4e8e\u975e\u987a\u5e8f\u6d88\u8d39\u7684\u573a\u666f\uff0cProcessQueue \u4e2d\u4fdd\u5b58\u7684\u6700\u540e\u4e00\u6761\u548c\u7b2c\u4e00\u6761\u6d88\u606f\u504f\u79fb\u91cf\u4e4b\u5dee\u8d85\u8fc7\u9608\u503c\uff08\u9ed8\u8ba4 2000\uff0c\u53ef\u4ee5\u914d\u7f6e\uff09\u3002\u6e90\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
          if<\/span>\u00a0(!this<\/span>.consumeOrderly)\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0(processQueue.getMaxSpan()\u00a0>\u00a0this<\/span>.defaultMQPushConsumer.getConsumeConcurrentlyMaxSpan())\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this<\/span>.executePullRequestLater(pullRequest,\u00a0PULL_TIME_DELAY_MILLS_WHEN_FLOW_CONTROL);\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0((queueMaxSpanFlowControlTimes++\u00a0%\u00a01000<\/span>)\u00a0==\u00a00<\/span>)\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0log.warn(\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\"the\u00a0queue's\u00a0messages,\u00a0span too\u00a0long,\u00a0so\u00a0do\u00a0flow\u00a0control,\u00a0minOffset={},\u00a0maxOffset={},\u00a0maxSpan={},\u00a0pullRequest={},\u00a0flowControlTimes={}\"<\/span>,\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0processQueue.getMsgTreeMap().firstKey(),\u00a0processQueue.getMsgTreeMap().lastKey(),\u00a0processQueue.getMaxSpan(),\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0pullRequest,\u00a0queueMaxSpanFlowControlTimes);\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>;\r\n\u00a0\u00a0\u00a0\u00a0}\r\n}\r\n<\/code><\/pre>\n
          2.4 \u83b7\u53d6\u9501\u5931\u8d25<\/h3>\n
          \u5bf9\u4e8e\u987a\u5e8f\u6d88\u8d39\u7684\u60c5\u51b5\uff0cProcessQueue \u52a0\u9501\u5931\u8d25\uff0c\u4e5f\u4f1a\u5ef6\u8fdf\u62c9\u53d6\uff0c\u8fd9\u4e2a\u5ef6\u8fdf\u65f6\u95f4\u9ed8\u8ba4\u662f 3s\uff0c\u53ef\u4ee5\u914d\u7f6e\u3002<\/p>\n
          3 \u603b\u7ed3<\/span><\/h2>\n
          \u672c\u6587\u4ecb\u7ecd\u4e86 RocketMQ \u53d1\u751f\u6d41\u91cf\u63a7\u5236\u7684 8 \u4e2a\u573a\u666f\uff0c\u5176\u4e2d Broker 4 \u4e2a\u573a\u666f\uff0cConsumer 4 \u4e2a\u573a\u666f\u3002Broker \u7684\u6d41\u91cf\u63a7\u5236\uff0c\u672c\u8d28\u662f\u5bf9 Producer \u7684\u6d41\u91cf\u63a7\u5236\uff0c\u6700\u597d\u7684\u89e3\u51b3\u65b9\u6cd5\u5c31\u662f\u7ed9 Broker \u6269\u5bb9\uff0c\u589e\u52a0 Broker \u5199\u5165\u80fd\u529b\u3002\u800c\u5bf9\u4e8e Consumer \u7aef\u7684\u6d41\u91cf\u63a7\u5236\uff0c\u9700\u8981\u89e3\u51b3 Consumer \u7aef\u6d88\u8d39\u6162\u7684\u95ee\u9898\uff0c\u6bd4\u5982\u6709\u7b2c\u4e09\u65b9\u63a5\u53e3\u54cd\u5e94\u6162\u6216\u8005\u6709\u6162 SQL\u3002<\/p>\n
          \u5728\u4f7f\u7528\u7684\u65f6\u5019\uff0c\u6839\u636e\u6253\u5370\u7684\u65e5\u5fd7\u53ef\u4ee5\u5206\u6790\u5177\u4f53\u662f\u54ea\u79cd\u60c5\u51b5\u7684\u6d41\u91cf\u63a7\u5236\uff0c\u5e76\u91c7\u7528\u76f8\u5e94\u7684\u63aa\u65bd\u3002<\/p>\n<\/section>\n<\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
          \u5728\u4f7f\u7528 RocketMQ \u7684\u8fc7\u7a0b\u4e2d\uff0c\u6709\u65f6\u5019\u6211\u4eec\u4f1a\u770b\u5230\u4e0b\u9762\u7684\u65e5\u5fd7\uff1a [TIMEOUT_CLEAN_QUEUE]b […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12,3],"tags":[],"class_list":["post-7635","post","type-post","status-publish","format-standard","hentry","category-linux","category-system"],"_links":{"self":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/7635","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7635"}],"version-history":[{"count":1,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/7635\/revisions"}],"predecessor-version":[{"id":7786,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/7635\/revisions\/7786"}],"wp:attachment":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7635"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7635"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7635"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}