{"id":1768,"date":"2020-07-01T04:36:47","date_gmt":"2020-06-30T20:36:47","guid":{"rendered":"http:\/\/39.97.231.10\/?p=1768"},"modified":"2020-07-01T04:36:47","modified_gmt":"2020-06-30T20:36:47","slug":"kafka-replica%e5%89%af%e6%9c%ac%e5%90%8c%e6%ad%a5%e6%9c%ba%e5%88%b6","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=1768","title":{"rendered":"kafka replica\u526f\u672c\u540c\u6b65\u673a\u5236"},"content":{"rendered":"
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1 \u524d\u8a00<\/div>\n<\/div>\n<\/div>\n<\/div>\n
Kafka\u7684\u6d41\u884c\u5f52\u529f\u4e8e\u5b83\u8bbe\u8ba1\u548c\u64cd\u4f5c\u7b80\u5355\u3001\u5b58\u50a8\u7cfb\u7edf\u9ad8\u6548\u3001\u5145\u5206\u5229\u7528\u78c1\u76d8\u987a\u5e8f\u8bfb\u5199\u7b49\u7279\u6027\u3001\u975e\u5e38\u9002\u5408\u5728\u7ebf\u65e5\u5fd7\u6536\u96c6\u7b49\u9ad8\u541e\u5410\u573a\u666f\u3002
\nKafka\u7279\u6027\u4e4b\u4e00\u662f\u5b83\u7684\u590d\u5236\u534f\u8bae\u3002\u590d\u5236\u534f\u8bae\u662f\u4fdd\u969ckafka\u9ad8\u53ef\u9760\u6027\u7684\u5173\u952e\u3002\u5bf9\u4e8e\u5355\u4e2a\u96c6\u7fa4\u4e2d\u6bcf\u4e2aBroker\u4e0d\u540c\u5de5\u4f5c\u8d1f\u8f7d\u60c5\u51b5\u4e0b\uff0c\u5982\u4f55\u81ea\u52a8\u8c03\u4f18Kafka\u526f\u672c\u7684\u5de5\u4f5c\u65b9\u5f0f\u662f\u6bd4\u8f83\u6709\u6311\u6218\u7684\u3002\u5b83\u7684\u6311\u6218\u4e4b\u4e00\u662f\u8981\u77e5\u9053\u5982\u4f55\u907f\u514dfollower\u8fdb\u5165\u548c\u9000\u51fa\u540c\u6b65\u526f\u672c\u5217\u8868(\u5373ISR)\u3002\u4ece\u7528\u6237\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u5982\u679c\u751f\u4ea7\u8005\u53d1\u9001\u4e00\u5927\u6279\u6d77\u91cf\u6d88\u606f\uff0c\u53ef\u80fd\u4f1a\u5f15\u8d77Kafka Broker\u5f88\u591a\u8b66\u544a\u3002\u8fd9\u4e9b\u8b66\u62a5\u8868\u660e\u4e00\u4e9btopics\u5904\u4e8e\u201cunder replicated\u201d\u72b6\u6001\uff0c\u8fd9\u4e9b\u526f\u672c\u5904\u4e8e\u540c\u6b65\u5931\u8d25\u6216\u5931\u6548\u72b6\u6001\uff0c\u66f4\u610f\u5473\u7740\u6570\u636e\u6ca1\u6709\u88ab\u590d\u5236\u5230\u8db3\u591f\u6570\u91cfBroker\u4ece\u800c\u589e\u52a0\u6570\u636e\u4e22\u5931\u7684\u6982\u7387\u3002\u56e0\u6b64Kafka\u96c6\u7fa4\u4e2d\u5904\u4e8e\u201cunder replicated\u201d\u4e2dPartition\u6570\u8981\u5bc6\u5207\u76d1\u63a7\u3002\u8fd9\u4e2a\u8b66\u544a\u5e94\u8be5\u6765\u81ea\u4e8eBroker\u5931\u6548,\u51cf\u6162\u6216\u6682\u505c\u7b49\u72b6\u6001\u800c\u4e0d\u662f\u751f\u4ea7\u8005\u5199\u4e0d\u540c\u5927\u5c0f\u6d88\u606f\u5f15\u8d77\u7684\u3002<\/p>\n

2 Kafka\u7684\u526f\u672c\u673a\u5236<\/h2>\n

Kafka\u4e2d\u4e3b\u9898\u7684\u6bcf\u4e2aPartition\u6709\u4e00\u4e2a\u9884\u5199\u5f0f\u65e5\u5fd7\u6587\u4ef6\uff0c\u6bcf\u4e2aPartition\u90fd\u7531\u4e00\u7cfb\u5217\u6709\u5e8f\u7684\u3001\u4e0d\u53ef\u53d8\u7684\u6d88\u606f\u7ec4\u6210\uff0c\u8fd9\u4e9b\u6d88\u606f\u88ab\u8fde\u7eed\u7684\u8ffd\u52a0\u5230Partition\u4e2d\uff0cPartition\u4e2d\u7684\u6bcf\u4e2a\u6d88\u606f\u90fd\u6709\u4e00\u4e2a\u8fde\u7eed\u7684\u5e8f\u5217\u53f7\u53eb\u505aoffset\uff0c \u786e\u5b9a\u5b83\u5728\u5206\u533a\u65e5\u5fd7\u4e2d\u552f\u4e00\u7684\u4f4d\u7f6e\u3002<\/p>\n

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<\/div>\n
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image<\/div>\n<\/div>\n

Kafka\u6bcf\u4e2atopic\u7684partition\u6709N\u4e2a\u526f\u672c\uff0c\u5176\u4e2dN\u662ftopic\u7684\u590d\u5236\u56e0\u5b50\u3002Kafka\u901a\u8fc7\u591a\u526f\u672c\u673a\u5236\u5b9e\u73b0\u6545\u969c\u81ea\u52a8\u8f6c\u79fb\uff0c\u5f53Kafka\u96c6\u7fa4\u4e2d\u4e00\u4e2aBroker\u5931\u6548\u60c5\u51b5\u4e0b\u4ecd\u7136\u4fdd\u8bc1\u670d\u52a1\u53ef\u7528\u3002\u5728Kafka\u4e2d\u53d1\u751f\u590d\u5236\u65f6\u786e\u4fddpartition\u7684\u9884\u5199\u5f0f\u65e5\u5fd7\u6709\u5e8f\u5730\u5199\u5230\u5176\u4ed6\u8282\u70b9\u4e0a\u3002N\u4e2areplicas\u4e2d\u3002\u5176\u4e2d\u4e00\u4e2areplica\u4e3aleader\uff0c\u5176\u4ed6\u90fd\u4e3afollower\uff0cleader\u5904\u7406partition\u7684\u6240\u6709\u8bfb\u5199\u8bf7\u6c42\uff0c\u4e0e\u6b64\u540c\u65f6\uff0cfollower\u4f1a\u88ab\u52a8\u5b9a\u671f\u5730\u53bb\u590d\u5236leader\u4e0a\u7684\u6570\u636e\u3002
\n\u5982\u4e0b\u56fe\u6240\u793a\uff0cKafka\u96c6\u7fa4\u4e2d\u67094\u4e2abroker, \u67d0topic\u67093\u4e2apartition,\u4e14\u590d\u5236\u56e0\u5b50\u5373\u526f\u672c\u4e2a\u6570\u4e5f\u4e3a3\uff1a<\/p>\n

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<\/div>\n
<\/div>\n<\/div>\n<\/div>\n

Kafka\u63d0\u4f9b\u4e86\u6570\u636e\u590d\u5236\u7b97\u6cd5\u4fdd\u8bc1\uff0c\u5982\u679cleader\u53d1\u751f\u6545\u969c\u6216\u6302\u6389\uff0c\u4e00\u4e2a\u65b0leader\u88ab\u9009\u4e3e\u5e76\u88ab\u63a5\u53d7\u5ba2\u6237\u7aef\u7684\u6d88\u606f\u6210\u529f\u5199\u5165\u3002Kafka\u786e\u4fdd\u4ece\u540c\u6b65\u526f\u672c\u5217\u8868\u4e2d\u9009\u4e3e\u4e00\u4e2a\u526f\u672c\u4e3aleader\uff0c\u6216\u8005\u8bf4follower\u8ffd\u8d76leader\u6570\u636e\u3002leader\u8d1f\u8d23\u7ef4\u62a4\u548c\u8ddf\u8e2aISR(In-Sync Replicas\u7684\u7f29\u5199\uff0c\u8868\u793a\u526f\u672c\u540c\u6b65\u961f\u5217\uff0c\u5177\u4f53\u53ef\u53c2\u8003\u4e0b\u8282)\u4e2d\u6240\u6709follower\u6ede\u540e\u7684\u72b6\u6001\u3002\u5f53producer\u53d1\u9001\u4e00\u6761\u6d88\u606f\u5230broker\u540e\uff0cleader\u5199\u5165\u6d88\u606f\u5e76\u590d\u5236\u5230\u6240\u6709follower\u3002\u6d88\u606f\u63d0\u4ea4\u4e4b\u540e\u624d\u88ab\u6210\u529f\u590d\u5236\u5230\u6240\u6709\u7684\u540c\u6b65\u526f\u672c\u3002\u6d88\u606f\u590d\u5236\u5ef6\u8fdf\u53d7\u6700\u6162\u7684follower\u9650\u5236\uff0c\u91cd\u8981\u7684\u662f\u5feb\u901f\u68c0\u6d4b\u6162\u526f\u672c\uff0c\u5982\u679cfollower\u201c\u843d\u540e\u201d\u592a\u591a\u6216\u8005\u5931\u6548\uff0cleader\u5c06\u4f1a\u628a\u5b83\u4eceISR\u4e2d\u5220\u9664\u3002
\n\u526f\u672c\u540c\u6b65\u961f\u5217(ISR)
\n\u6240\u8c13\u540c\u6b65\uff0c\u5fc5\u987b\u6ee1\u8db3\u5982\u4e0b\u4e24\u4e2a\u6761\u4ef6\uff1a<\/p>\n

    \n
  • \u526f\u672c\u8282\u70b9\u5fc5\u987b\u80fd\u4e0ezookeeper\u4fdd\u6301\u4f1a\u8bdd\uff08\u5fc3\u8df3\u673a\u5236\uff09<\/li>\n
  • \u526f\u672c\u80fd\u590d\u5236leader\u4e0a\u7684\u6240\u6709\u5199\u64cd\u4f5c\uff0c\u5e76\u4e14\u4e0d\u80fd\u843d\u540e\u592a\u591a\u3002(\u5361\u4f4f\u6216\u6ede\u540e\u7684\u526f\u672c\u63a7\u5236\u662f\u7531 replica.lag.time.max.ms \u914d\u7f6e)<\/li>\n<\/ul>\n

    \u9ed8\u8ba4\u60c5\u51b5\u4e0bKafka\u5bf9\u5e94\u7684topic\u7684replica\u6570\u91cf\u4e3a1\uff0c\u5373\u6bcf\u4e2apartition\u90fd\u6709\u4e00\u4e2a\u552f\u4e00\u7684leader\uff0c\u4e3a\u4e86\u786e\u4fdd\u6d88\u606f\u7684\u53ef\u9760\u6027\uff0c\u901a\u5e38\u5e94\u7528\u4e2d\u5c06\u5176\u503c(\u7531broker\u7684\u53c2\u6570offsets.topic.replication.factor\u6307\u5b9a)\u5927\u5c0f\u8bbe\u7f6e\u4e3a\u5927\u4e8e1\uff0c\u6bd4\u59823\u3002 \u6240\u6709\u7684\u526f\u672c\uff08replicas\uff09\u7edf\u79f0\u4e3aAssigned Replicas\uff0c\u5373AR\u3002ISR\u662fAR\u4e2d\u7684\u4e00\u4e2a\u5b50\u96c6\uff0c\u7531leader\u7ef4\u62a4ISR\u5217\u8868\uff0cfollower\u4eceleader\u540c\u6b65\u6570\u636e\u6709\u4e00\u4e9b\u5ef6\u8fdf\u3002\u4efb\u610f\u4e00\u4e2a\u8d85\u8fc7\u9608\u503c\u90fd\u4f1a\u628afollower\u5254\u9664\u51faISR, \u5b58\u5165OSR\uff08Outof-Sync Replicas\uff09\u5217\u8868\uff0c\u65b0\u52a0\u5165\u7684follower\u4e5f\u4f1a\u5148\u5b58\u653e\u5728OSR\u4e2d\u3002AR=ISR+OSR\u3002
    \n\u4e0a\u4e00\u8282\u4e2d\u7684HW\u4fd7\u79f0\u9ad8\u6c34\u4f4d\uff0c\u662fHighWatermark\u7684\u7f29\u5199\uff0c\u53d6\u4e00\u4e2apartition\u5bf9\u5e94\u7684ISR\u4e2d\u6700\u5c0f\u7684LEO\u4f5c\u4e3aHW\uff0cconsumer\u6700\u591a\u53ea\u80fd\u6d88\u8d39\u5230HW\u6240\u5728\u7684\u4f4d\u7f6e\u3002\u53e6\u5916\u6bcf\u4e2areplica\u90fd\u6709HW,leader\u548cfollower\u5404\u81ea\u8d1f\u8d23\u66f4\u65b0\u81ea\u5df1\u7684HW\u7684\u72b6\u6001\u3002\u5bf9\u4e8eleader\u65b0\u5199\u5165\u7684\u6d88\u606f\uff0cconsumer\u4e0d\u80fd\u7acb\u523b\u6d88\u8d39\uff0cleader\u4f1a\u7b49\u5f85\u8be5\u6d88\u606f\u88ab\u6240\u6709ISR\u4e2d\u7684replicas\u540c\u6b65\u540e\u66f4\u65b0HW\uff0c\u6b64\u65f6\u6d88\u606f\u624d\u80fd\u88abconsumer\u6d88\u8d39\u3002\u8fd9\u6837\u5c31\u4fdd\u8bc1\u4e86\u5982\u679cleader\u6240\u5728\u7684broker\u5931\u6548\uff0c\u8be5\u6d88\u606f\u4ecd\u7136\u53ef\u4ee5\u4ece\u65b0\u9009\u4e3e\u7684leader\u4e2d\u83b7\u53d6\u3002\u5bf9\u4e8e\u6765\u81ea\u5185\u90e8broKer\u7684\u8bfb\u53d6\u8bf7\u6c42\uff0c\u6ca1\u6709HW\u7684\u9650\u5236\u3002
    \n\u4e0b\u56fe\u8be6\u7ec6\u7684\u8bf4\u660e\u4e86\u5f53producer\u751f\u4ea7\u6d88\u606f\u81f3broker\u540e\uff0cISR\u4ee5\u53caHW\u548cLEO\u7684\u6d41\u8f6c\u8fc7\u7a0b\uff1a<\/p>\n

    \n
    \n
    <\/div>\n
    <\/div>\n<\/div>\n<\/div>\n

    \u7531\u6b64\u53ef\u89c1\uff0cKafka\u7684\u590d\u5236\u673a\u5236\u65e2\u4e0d\u662f\u5b8c\u5168\u7684\u540c\u6b65\u590d\u5236\uff0c\u4e5f\u4e0d\u662f\u5355\u7eaf\u7684\u5f02\u6b65\u590d\u5236\u3002\u4e8b\u5b9e\u4e0a\uff0c\u540c\u6b65\u590d\u5236\u8981\u6c42\u6240\u6709\u80fd\u5de5\u4f5c\u7684follower\u90fd\u590d\u5236\u5b8c\uff0c\u8fd9\u6761\u6d88\u606f\u624d\u4f1a\u88abcommit\uff0c\u8fd9\u79cd\u590d\u5236\u65b9\u5f0f\u6781\u5927\u7684\u5f71\u54cd\u4e86\u541e\u5410\u7387\u3002\u800c\u5f02\u6b65\u590d\u5236\u65b9\u5f0f\u4e0b\uff0cfollower\u5f02\u6b65\u7684\u4eceleader\u590d\u5236\u6570\u636e\uff0c\u6570\u636e\u53ea\u8981\u88ableader\u5199\u5165log\u5c31\u88ab\u8ba4\u4e3a\u5df2\u7ecfcommit\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5982\u679cfollower\u90fd\u8fd8\u6ca1\u6709\u590d\u5236\u5b8c\uff0c\u843d\u540e\u4e8eleader\u65f6\uff0c\u7a81\u7136leader\u5b95\u673a\uff0c\u5219\u4f1a\u4e22\u5931\u6570\u636e\u3002\u800cKafka\u7684\u8fd9\u79cd\u4f7f\u7528ISR\u7684\u65b9\u5f0f\u5219\u5f88\u597d\u7684\u5747\u8861\u4e86\u786e\u4fdd\u6570\u636e\u4e0d\u4e22\u5931\u4ee5\u53ca\u541e\u5410\u7387\u3002<\/p>\n

      \n
    • Controller\u6765\u7ef4\u62a4\uff1aKafka\u96c6\u7fa4\u4e2d\u7684\u5176\u4e2d\u4e00\u4e2aBroker\u4f1a\u88ab\u9009\u4e3e\u4e3aController\uff0c\u4e3b\u8981\u8d1f\u8d23Partition\u7ba1\u7406\u548c\u526f\u672c\u72b6\u6001\u7ba1\u7406\uff0c\u4e5f\u4f1a\u6267\u884c\u7c7b\u4f3c\u4e8e\u91cd\u5206\u914dpartition\u4e4b\u7c7b\u7684\u7ba1\u7406\u4efb\u52a1\u3002\u5728\u7b26\u5408\u67d0\u4e9b\u7279\u5b9a\u6761\u4ef6\u4e0b\uff0cController\u4e0b\u7684LeaderSelector\u4f1a\u9009\u4e3e\u65b0\u7684leader\uff0cISR\u548c\u65b0\u7684leader_epoch\u53cacontroller_epoch\u5199\u5165Zookeeper\u7684\u76f8\u5173\u8282\u70b9\u4e2d\u3002\u540c\u65f6\u53d1\u8d77LeaderAndIsrRequest\u901a\u77e5\u6240\u6709\u7684replicas\u3002<\/li>\n
    • leader\u6765\u7ef4\u62a4\uff1aleader\u6709\u5355\u72ec\u7684\u7ebf\u7a0b\u5b9a\u671f\u68c0\u6d4bISR\u4e2dfollower\u662f\u5426\u8131\u79bbISR, \u5982\u679c\u53d1\u73b0ISR\u53d8\u5316\uff0c\u5219\u4f1a\u5c06\u65b0\u7684ISR\u7684\u4fe1\u606f\u8fd4\u56de\u5230Zookeeper\u7684\u76f8\u5173\u8282\u70b9\u4e2d\u3002<\/li>\n<\/ul>\n

      \u526f\u672c\u4e0d\u540c\u6b65\u7684\u5f02\u5e38\u60c5\u51b5<\/p>\n

        \n
      • \u6162\u526f\u672c\uff1a\u5728\u4e00\u5b9a\u5468\u671f\u65f6\u95f4\u5185follower\u4e0d\u80fd\u8ffd\u8d76\u4e0aleader\u3002\u6700\u5e38\u89c1\u7684\u539f\u56e0\u4e4b\u4e00\u662fI \/ O\u74f6\u9888\u5bfc\u81f4follower\u8ffd\u52a0\u590d\u5236\u6d88\u606f\u901f\u5ea6\u6162\u4e8e\u4eceleader\u62c9\u53d6\u901f\u5ea6\u3002<\/li>\n
      • \u5361\u4f4f\u526f\u672c\uff1a\u5728\u4e00\u5b9a\u5468\u671f\u65f6\u95f4\u5185follower\u505c\u6b62\u4eceleader\u62c9\u53d6\u8bf7\u6c42\u3002follower replica\u5361\u4f4f\u4e86\u662f\u7531\u4e8eGC\u6682\u505c\u6216follower\u5931\u6548\u6216\u6b7b\u4ea1\u3002<\/li>\n
      • \u65b0\u542f\u52a8\u526f\u672c\uff1a\u5f53\u7528\u6237\u7ed9\u4e3b\u9898\u589e\u52a0\u526f\u672c\u56e0\u5b50\u65f6\uff0c\u65b0\u7684follower\u4e0d\u5728\u540c\u6b65\u526f\u672c\u5217\u8868\u4e2d\uff0c\u76f4\u5230\u4ed6\u4eec\u5b8c\u5168\u8d76\u4e0a\u4e86leader\u65e5\u5fd7\u3002<\/li>\n<\/ul>\n

        3 Follower\u5411leader\u62c9\u53d6\u6570\u636e\u7684\u8fc7\u7a0b<\/h2>\n

        3.1 replica fetcher \u7ebf\u7a0b\u4f55\u65f6\u542f\u52a8<\/h3>\n

        broker \u5206\u914d\u7684\u4efb\u4f55\u4e00\u4e2a partition \u90fd\u662f\u4ee5 Replica \u5bf9\u8c61\u5b9e\u4f8b\u7684\u5f62\u5f0f\u5b58\u5728\uff0c\u800c Replica \u5728 Kafka \u4e0a\u662f\u6709\u4e24\u4e2a\u89d2\u8272\uff1a leader \u548c follower\uff0c\u53ea\u8981\u8fd9\u4e2a Replica \u662f follower\uff0c\u5b83\u4fbf\u4f1a\u5411 leader \u8fdb\u884c\u6570\u636e\u540c\u6b65\u3002
        \n\u53cd\u6620\u5728 ReplicaManager \u4e0a\u5c31\u662f\u5982\u679c Broker \u7684\u672c\u5730\u526f\u672c\u88ab\u9009\u4e3e\u4e3a follower\uff0c\u90a3\u4e48\u5b83\u5c06\u4f1a\u542f\u52a8\u526f\u672c\u540c\u6b65\u7ebf\u7a0b\uff0c\u5176\u5177\u4f53\u5b9e\u73b0\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

        \n
        \n
        <\/div>\n
        <\/div>\n<\/div>\n
        <\/div>\n<\/div>\n

        \u7b80\u5355\u6765\u8bf4\uff0cmakeFollowers() \u7684\u5904\u7406\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n

          \n
        1. \u5148\u4ece\u672c\u5730\u8bb0\u5f55 leader partition \u7684\u96c6\u5408\u4e2d\u5c06\u8fd9\u4e9b partition \u79fb\u9664\uff0c\u56e0\u4e3a\u8fd9\u4e9b partition \u5df2\u7ecf\u88ab\u9009\u4e3e\u4e3a\u4e86 follower\uff1b<\/li>\n
        2. \u5c06\u8fd9\u4e9b partition \u7684\u672c\u5730\u526f\u672c\u8bbe\u7f6e\u4e3a follower\uff0c\u540e\u9762\u5c31\u4e0d\u4f1a\u63a5\u6536\u5173\u4e8e\u8fd9\u4e2a partition \u7684 Produce \u8bf7\u6c42\u4e86\uff0c\u5982\u679c\u4f9d\u7136\u6709 client \u5728\u5411\u8fd9\u53f0 broker \u53d1\u9001\u6570\u636e\uff0c\u90a3\u4e48\u5b83\u5c06\u4f1a\u8fd4\u56de\u76f8\u5e94\u7684\u9519\u8bef\uff1b<\/li>\n
        3. \u5148\u505c\u6b62\u5173\u4e8e\u8fd9\u4e9b partition \u7684\u526f\u672c\u540c\u6b65\u7ebf\u7a0b\uff08\u5982\u679c\u672c\u5730\u526f\u672c\u4e4b\u524d\u662f follower \u73b0\u5728\u8fd8\u662f follower\uff0c\u5148\u5173\u95ed\u7684\u539f\u56e0\u662f\uff1a\u8fd9\u4e2a partition \u7684 leader \u53d1\u751f\u4e86\u53d8\u5316\uff0c\u5982\u679c leader \u6ca1\u6709\u53d1\u751f\u53d8\u5316\uff0c\u90a3\u4e48 makeFollower\u65b9\u6cd5\u8fd4\u56de\u7684\u662f False\uff0c\u8fd9\u4e2a Partition \u5c31\u4e0d\u4f1a\u88ab\u6dfb\u52a0\u5230 partitionsToMakeFollower \u96c6\u5408\u4e2d\uff09\uff0c\u8fd9\u6837\u7684\u8bdd\u53ef\u4ee5\u4fdd\u8bc1\u8fd9\u4e9b partition \u7684\u672c\u5730\u526f\u672c\u5c06\u4e0d\u4f1a\u518d\u6709\u65b0\u7684\u6570\u636e\u8ffd\u52a0\uff1b<\/li>\n
        4. \u5bf9\u8fd9\u4e9b partition \u672c\u5730\u526f\u672c\u65e5\u5fd7\u6587\u4ef6\u8fdb\u884c\u622a\u65ad\u64cd\u4f5c\u5e76\u8fdb\u884c checkpoint \u64cd\u4f5c\uff1b<\/li>\n
        5. \u5b8c\u6210\u90a3\u4e9b\u5ef6\u8fdf\u5904\u7406\u7684 Produce \u548c Fetch \u8bf7\u6c42\uff1b<\/li>\n
        6. \u5982\u679c\u672c\u5730\u7684 broker \u6ca1\u6709\u6389\u7ebf\uff0c\u90a3\u4e48\u5411\u8fd9\u4e9b partition \u65b0\u9009\u4e3e\u51fa\u6765\u7684 leader \u542f\u52a8\u526f\u672c\u540c\u6b65\u7ebf\u7a0b\u3002<\/li>\n<\/ol>\n

          \u5173\u4e8e\u7b2c6\u6b65\uff0c\u5e76\u4e0d\u4e00\u5b9a\u4f1a\u4e3a\u6bcf\u4e00\u4e2a partition \u90fd\u542f\u52a8\u4e00\u4e2a fetcher \u7ebf\u7a0b\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u76ee\u7684 broker\uff0c\u53ea\u4f1a\u542f\u52a8\u00a0num.replica.fetchers\u00a0\u4e2a\u7ebf\u7a0b\uff0c\u5177\u4f53\u8fd9\u4e2a topic-partition \u4f1a\u5206\u914d\u5230\u54ea\u4e2a fetcher \u7ebf\u7a0b\u4e0a\uff0c\u662f\u6839\u636e topic \u540d\u548c partition id \u8fdb\u884c\u8ba1\u7b97\u5f97\u5230\uff0c\u5b9e\u73b0\u6240\u793a\uff1a<\/p>\n

          \n
          \n
          <\/div>\n
          <\/div>\n<\/div>\n
          <\/div>\n<\/div>\n

          3.2 replica fetcher \u7ebf\u7a0b\u542f\u52a8<\/h3>\n

          \u5982\u4e0a\u6240\u793a\uff0c\u5728 ReplicaManager \u8c03\u7528 makeFollowers() \u542f\u52a8 replica fetcher \u7ebf\u7a0b\u540e\uff0c\u5b83\u5b9e\u9645\u4e0a\u662f\u901a\u8fc7 ReplicaFetcherManager \u5b9e\u4f8b\u8fdb\u884c\u76f8\u5173 topic-partition \u540c\u6b65\u7ebf\u7a0b\u7684\u542f\u52a8\u548c\u5173\u95ed\uff0c\u5176\u542f\u52a8\u8fc7\u7a0b\u5206\u4e3a\u4e0b\u9762\u4e24\u6b65\uff1a<\/p>\n

            \n
          1. ReplicaFetcherManager \u8c03\u7528 addFetcherForPartitions() \u6dfb\u52a0\u5bf9\u8fd9\u4e9b topic-partition \u7684\u6570\u636e\u540c\u6b65\u6d41\u7a0b\uff1b<\/li>\n
          2. ReplicaFetcherManager \u8c03\u7528 createFetcherThread() \u521d\u59cb\u5316\u76f8\u5e94\u7684 ReplicaFetcherThread \u7ebf\u7a0b\u3002<\/li>\n<\/ol>\n

            addFetcherForPartitions()\u00a0\u7684\u5177\u4f53\u5b9e\u73b0\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

            \n
            \n
            <\/div>\n
            <\/div>\n<\/div>\n
            <\/div>\n<\/div>\n

            \u8fd9\u4e2a\u65b9\u6cd5\u5176\u5b9e\u662f\u505a\u4e86\u4e0b\u9762\u8fd9\u51e0\u4ef6\u4e8b\uff1a<\/p>\n

              \n
            1. \u5148\u8ba1\u7b97\u8fd9\u4e2a topic-partition \u5bf9\u5e94\u7684 fetcher id\uff1b<\/li>\n
            2. \u6839\u636e leader \u548c fetcher id \u83b7\u53d6\u5bf9\u5e94\u7684 replica fetcher \u7ebf\u7a0b\uff0c\u5982\u679c\u6ca1\u6709\u627e\u5230\uff0c\u5c31\u8c03\u7528 createFetcherThread() \u521b\u5efa\u4e00\u4e2a\u65b0\u7684 fetcher \u7ebf\u7a0b\uff1b<\/li>\n
            3. \u5982\u679c\u662f\u65b0\u542f\u52a8\u7684 replica fetcher \u7ebf\u7a0b\uff0c\u90a3\u4e48\u5c31\u542f\u52a8\u8fd9\u4e2a\u7ebf\u7a0b\uff1b<\/li>\n
            4. \u5c06 topic-partition \u8bb0\u5f55\u5230 fetcherThreadMap \u4e2d\uff0c\u8fd9\u4e2a\u53d8\u91cf\u8bb0\u5f55\u6bcf\u4e2a replica fetcher \u7ebf\u7a0b\u8981\u540c\u6b65\u7684 topic-partition \u5217\u8868\u3002<\/li>\n<\/ol>\n

              ReplicaFetcherManager \u521b\u5efa replica Fetcher \u7ebf\u7a0b\u7684\u5b9e\u73b0\u5982\u4e0b\uff1a<\/p>\n

              \n
              \n
              <\/div>\n
              <\/div>\n<\/div>\n
              <\/div>\n<\/div>\n

              3.3 replica fetcher \u7ebf\u7a0b\u5904\u7406\u8fc7\u7a0b<\/h3>\n

              replica fetcher \u7ebf\u7a0b\u5728\u542f\u52a8\u4e4b\u540e\u5c31\u5f00\u59cb\u8fdb\u884c\u6b63\u5e38\u6570\u636e\u540c\u6b65\u6d41\u7a0b\u4e86\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u90fd\u662f\u5728 ReplicaFetcherThread \u7ebf\u7a0b\u4e2d\u5b9e\u73b0\u7684\u3002
              \nReplicaFetcherThread \u7684\u00a0doWork()\u00a0\u65b9\u6cd5\u662f\u4e00\u76f4\u5728\u8fd9\u4e2a\u7ebf\u7a0b\u4e2d\u7684\u00a0run()\u00a0\u4e2d\u8c03\u7528\u7684\uff0c\u5b9e\u73b0\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n

              \n
              \n
              <\/div>\n
              <\/div>\n<\/div>\n
              <\/div>\n<\/div>\n

              \u5728 doWork() \u65b9\u6cd5\u4e2d\u4e3b\u8981\u505a\u4e86\u4e24\u4ef6\u4e8b\uff1a<\/p>\n

                \n
              1. \u6784\u9020\u76f8\u5e94\u7684 Fetch \u8bf7\u6c42\uff08buildFetchRequest()\uff09\uff1b<\/li>\n
              2. \u901a\u8fc7 processFetchRequest() \u65b9\u6cd5\u53d1\u9001 Fetch \u8bf7\u6c42\uff0c\u5e76\u5bf9\u5176\u7ed3\u679c\u8fdb\u884c\u76f8\u5e94\u7684\u5904\u7406\u3002<\/li>\n<\/ol>\n

                processFetchRequest()\u00a0\u8fd9\u4e2a\u65b9\u6cd5\u7684\u4f5c\u7528\u662f\u53d1\u9001 Fetch \u8bf7\u6c42\uff0c\u5e76\u5bf9\u8fd4\u56de\u7684\u7ed3\u679c\u8fdb\u884c\u5904\u7406\uff0c\u6700\u7ec8\u5199\u5165\u5230\u672c\u5730\u526f\u672c\u7684 Log \u5b9e\u4f8b\u4e2d\uff0c\u5176\u5177\u4f53\u5b9e\u73b0\uff1a<\/p>\n

                \n
                \n
                <\/div>\n
                <\/div>\n<\/div>\n<\/div>\n
                \n
                \n
                <\/div>\n
                <\/div>\n<\/div>\n<\/div>\n

                \u5176\u5904\u7406\u8fc7\u7a0b\u7b80\u5355\u603b\u7ed3\u4e00\u4e0b\uff1a<\/p>\n

                  \n
                1. \u901a\u8fc7 fetch() \u65b9\u6cd5\uff0c\u53d1\u9001 Fetch \u8bf7\u6c42\uff0c\u83b7\u53d6\u76f8\u5e94\u7684 response\uff08\u5982\u679c\u9047\u5230\u5f02\u5e38\uff0c\u90a3\u4e48\u5728\u4e0b\u6b21\u53d1\u9001 Fetch \u8bf7\u6c42\u4e4b\u524d\uff0c\u4f1a sleep \u4e00\u6bb5\u65f6\u95f4\u518d\u53d1\uff09\uff1b<\/li>\n
                2. \u5982\u679c\u8fd4\u56de\u7684\u7ed3\u679c \u4e0d\u4e3a\u7a7a\uff0c\u5e76\u4e14 Fetch \u8bf7\u6c42\u7684 offset \u4fe1\u606f\u4e0e\u8fd4\u56de\u7ed3\u679c\u7684 offset \u4fe1\u606f\u5bf9\u5f97\u4e0a\uff0c\u90a3\u4e48\u5c31\u4f1a\u8c03\u7528 processPartitionData() \u65b9\u6cd5\u5c06\u62c9\u53d6\u5230\u7684\u6570\u636e\u8ffd\u52a0\u672c\u5730\u526f\u672c\u7684\u65e5\u5fd7\u6587\u4ef6\u4e2d\uff0c\u5982\u679c\u8fd4\u56de\u7ed3\u679c\u6709\u9519\u8bef\u4fe1\u606f\uff0c\u90a3\u4e48\u5c31\u5bf9\u76f8\u5e94\u9519\u8bef\u8fdb\u884c\u76f8\u5e94\u7684\u5904\u7406\uff1b<\/li>\n
                3. \u5bf9\u5728 Fetch \u8fc7\u7a0b\u4e2d\u9047\u5230\u5f02\u5e38\u6216\u8fd4\u56de\u9519\u8bef\u7684 topic-partition\uff0c\u4f1a\u8fdb\u884c delay \u64cd\u4f5c\uff0c\u4e0b\u6b21 Fetch \u8bf7\u6c42\u7684\u53d1\u751f\u81f3\u5c11\u8981\u95f4\u9694 replica.fetch.backoff.ms \u65f6\u95f4\u3002<\/li>\n<\/ol>\n

                  fetch()\u00a0\u65b9\u6cd5\u4f5c\u7528\u662f\u53d1\u9001 Fetch \u8bf7\u6c42\uff0c\u5e76\u8fd4\u56de\u76f8\u5e94\u7684\u7ed3\u679c\uff0c\u5176\u5177\u4f53\u7684\u5b9e\u73b0\uff0c\u5982\u4e0b\uff1a<\/p>\n

                  \n
                  \n
                  <\/div>\n
                  <\/div>\n<\/div>\n
                  <\/div>\n<\/div>\n

                  processPartitionData
                  \n\u8fd9\u4e2a\u65b9\u6cd5\u7684\u4f5c\u7528\u662f\uff0c\u5904\u7406 Fetch \u8bf7\u6c42\u7684\u5177\u4f53\u6570\u636e\u5185\u5bb9\uff0c\u7b80\u5355\u6765\u8bf4\u5c31\u662f\uff1a\u68c0\u67e5\u4e00\u4e0b\u6570\u636e\u5927\u5c0f\u662f\u5426\u8d85\u8fc7\u9650\u5236\u3001\u5c06\u6570\u636e\u8ffd\u52a0\u5230\u672c\u5730\u526f\u672c\u7684\u65e5\u5fd7\u6587\u4ef6\u4e2d\u3001\u66f4\u65b0\u672c\u5730\u526f\u672c\u7684 hw \u503c\u3002<\/p>\n

                  \n
                  \n
                  <\/div>\n
                  <\/div>\n<\/div>\n
                  <\/div>\n<\/div>\n

                  3.3 \u526f\u672c\u540c\u6b65\u5f02\u5e38\u60c5\u51b5\u7684\u5904\u7406<\/h3>\n

                  \u5728\u526f\u672c\u540c\u6b65\u7684\u8fc7\u7a0b\u4e2d\uff0c\u4f1a\u9047\u5230\u54ea\u4e9b\u5f02\u5e38\u60c5\u51b5\u5462\uff1f
                  \n\u5927\u5bb6\u4e00\u5b9a\u4f1a\u60f3\u5230\u5173\u4e8e offset \u7684\u95ee\u9898\uff0c\u5728 Kafka \u4e2d\uff0c\u5173\u4e8e offset \u7684\u5904\u7406\uff0c\u65e0\u8bba\u662f producer \u7aef\u3001consumer \u7aef\u8fd8\u662f\u5176\u4ed6\u5730\u65b9\uff0coffset \u4f3c\u4e4e\u90fd\u662f\u4e00\u4e2a\u5f62\u5f71\u4e0d\u79bb\u7684\u95ee\u9898\u3002\u5728\u526f\u672c\u540c\u6b65\u65f6\uff0c\u5173\u4e8e offset\uff0c\u4f1a\u9047\u5230\u4ec0\u4e48\u95ee\u9898\u5462\uff1f\u4e0b\u9762\u4e3e\u4e24\u4e2a\u5f02\u5e38\u7684\u573a\u666f\uff1a<\/p>\n

                    \n
                  1. \u5047\u5982\u5f53\u524d\u672c\u5730\uff08id\uff1a1\uff09\u7684\u526f\u672c\u73b0\u5728\u662f leader\uff0c\u5176 LEO \u5047\u8bbe\u4e3a1000\uff0c\u800c\u53e6\u4e00\u4e2a\u5728 isr \u4e2d\u7684\u526f\u672c\uff08id\uff1a2\uff09\u5176 LEO \u4e3a800\uff0c\u6b64\u65f6\u51fa\u73b0\u7f51\u7edc\u6296\u52a8\uff0cid \u4e3a1 \u7684\u673a\u5668\u6389\u7ebf\u540e\u53c8\u4e0a\u7ebf\u4e86\uff0c\u4f46\u662f\u6b64\u65f6\u526f\u672c\u7684 leader \u5b9e\u9645\u4e0a\u5df2\u7ecf\u53d8\u6210\u4e86 2\uff0c\u800c2\u7684 LEO \u4e3a800\uff0c\u8fd9\u65f6\u50191\u542f\u52a8\u526f\u672c\u540c\u6b65\u7ebf\u7a0b\u53bb2\u4e0a\u62c9\u53d6\u6570\u636e\uff0c\u5e0c\u671b\u4ece offset=1000 \u7684\u5730\u65b9\u5f00\u59cb\u62c9\u53d6\uff0c\u4f46\u662f2\u4e0a\u6700\u5927\u7684 offset \u624d\u662f800\uff0c\u8fd9\u79cd\u60c5\u51b5\u8be5\u5982\u4f55\u5904\u7406\u5462\uff1f<\/li>\n
                  2. \u5047\u8bbe\u4e00\u4e2a replica \uff08id\uff1a1\uff09\u5176 LEO \u662f10\uff0c\u5b83\u5df2\u7ecf\u6389\u7ebf\u597d\u51e0\u5929\uff0c\u8fd9\u4e2a partition leader \u7684 offset \u8303\u56f4\u662f [100, 800]\uff0c\u90a3\u4e48 1 \u91cd\u542f\u542f\u52a8\u65f6\uff0c\u5b83\u5e0c\u671b\u4ece offset=10 \u7684\u5730\u65b9\u5f00\u59cb\u62c9\u53d6\u6570\u636e\u65f6\uff0c\u8fd9\u65f6\u5019\u53d1\u751f\u4e86 OutOfRange\uff0c\u4e0d\u8fc7\u8ddf\u4e0a\u9762\u4e0d\u540c\u7684\u662f\u8fd9\u91cc\u662f\u5c0f\u4e8e\u4e86 leader offset \u7684\u8303\u56f4\uff0c\u8fd9\u79cd\u60c5\u51b5\u53c8\u8be5\u600e\u4e48\u5904\u7406\uff1f<\/li>\n<\/ol>\n

                    \u4ee5\u4e0a\u4e24\u79cd\u60c5\u51b5\u90fd\u662f offset OutOfRange \u7684\u60c5\u51b5\uff0c\u53ea\u4e0d\u8fc7\uff1a\u4e00\u662f Fetch Offset \u8d85\u8fc7\u4e86 leader \u7684 LEO\uff0c\u4e8c\u662f Fetch Offset \u5c0f\u4e8e leader \u6700\u5c0f\u7684 offset
                    \n\u5728\u4ecb\u7ecd Kafka \u89e3\u51b3\u65b9\u6848\u4e4b\u524d\uff0c\u6211\u4eec\u5148\u6765\u81ea\u5df1\u601d\u8003\u4e00\u4e0b\u8fd9\u4e24\u79cd\u60c5\u51b5\u5e94\u8be5\u600e\u4e48\u5904\u7406\uff1f<\/p>\n

                      \n
                    1. \u5982\u679c fetch offset \u8d85\u8fc7 leader \u7684 offset\uff0c\u8fd9\u65f6\u5019\u526f\u672c\u5e94\u8be5\u662f\u56de\u6eaf\u5230 leader \u7684 LEO \u4f4d\u7f6e\uff08\u8d85\u8fc7\u8fd9\u4e2a\u503c\u7684\u6570\u636e\u5220\u9664\uff09\uff0c\u7136\u540e\u518d\u53bb\u8fdb\u884c\u526f\u672c\u540c\u6b65\uff0c\u5f53\u7136\u8fd9\u79cd\u89e3\u51b3\u65b9\u6848\u5176\u5b9e\u662f\u65e0\u6cd5\u4fdd\u8bc1 leader \u4e0e follower \u6570\u636e\u7684\u5b8c\u5168\u4e00\u81f4\uff0c\u518d\u6b21\u53d1\u751f leader \u5207\u6362\u65f6\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6570\u636e\u7684\u53ef\u89c1\u6027\u4e0d\u4e00\u81f4\uff0c\u4f46\u65e2\u7136\u7528\u6237\u5141\u8bb8\u4e86\u810f\u9009\u4e3e\u7684\u53d1\u751f\uff0c\u5176\u5b9e\u6211\u4eec\u662f\u53ef\u4ee5\u8ba4\u4e3a\u7528\u6237\u662f\u53ef\u4ee5\u63a5\u6536\u8fd9\u79cd\u60c5\u51b5\u53d1\u751f\u7684\uff1b<\/li>\n
                    2. \u8fd9\u79cd\u5c31\u6bd4\u8f83\u5bb9\u6613\u5904\u7406\uff0c\u9996\u5148\u6e05\u7a7a\u672c\u5730\u7684\u6570\u636e\uff0c\u56e0\u4e3a\u672c\u5730\u7684\u6570\u636e\u90fd\u5df2\u7ecf\u8fc7\u671f\u4e86\uff0c\u7136\u540e\u4ece leader \u7684\u6700\u5c0f offset \u4f4d\u7f6e\u5f00\u59cb\u62c9\u53d6\u6570\u636e\u3002<\/li>\n<\/ol>\n

                      \u4e0a\u9762\u662f\u6211\u4eec\u6bd4\u8f83\u5bb9\u6613\u60f3\u51fa\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u800c\u5728 Kafka \u4e2d\uff0c\u5176\u89e3\u51b3\u65b9\u6848\u4e5f\u5f88\u7c7b\u4f3c\uff0c\u4e0d\u8fc7\u9047\u5230\u60c5\u51b5\u6bd4\u4e0a\u9762\u6211\u4eec\u5217\u51fa\u7684\u4e24\u79cd\u60c5\u51b5\u591a\u4e86\u4e00\u4e9b\u590d\u6742\uff0c\u5176\u89e3\u51b3\u65b9\u6848\u5982\u4e0b\uff1a<\/p>\n

                      \n
                      \n
                      <\/div>\n
                      <\/div>\n<\/div>\n
                      <\/div>\n<\/div>\n

                      \u9488\u5bf9\u7b2c\u4e00\u79cd\u60c5\u51b5\uff0c\u5728 Kafka \u4e2d\uff0c\u5b9e\u9645\u4e0a\u8fd8\u4f1a\u53d1\u751f\u8fd9\u6837\u4e00\u79cd\u60c5\u51b5\uff0c1 \u5728\u6536\u5230 OutOfRange \u9519\u8bef\u65f6\uff0c\u8fd9\u65f6\u53bb leader \u4e0a\u83b7\u53d6\u7684 LEO \u503c\u4e0e\u6700\u5c0f\u7684 offset \u503c\uff0c\u8fd9\u65f6\u5019\u5374\u53d1\u73b0 leader \u7684 LEO \u5df2\u7ecf\u4ece 800 \u53d8\u6210\u4e86 1100\uff08\u8fd9\u4e2a topic-partition \u7684\u6570\u636e\u91cf\u589e\u957f\u5f97\u6bd4\u8f83\u5feb\uff09\uff0c\u518d\u6309\u7167\u4e0a\u9762\u7684\u89e3\u51b3\u65b9\u6848\u5c31\u4e0d\u592a\u5408\u7406\uff0cKafka \u8fd9\u8fb9\u7684\u89e3\u51b3\u65b9\u6848\u662f\uff1a\u9047\u5230\u8fd9\u79cd\u60c5\u51b5\uff0c\u8fdb\u884c\u91cd\u8bd5\u5c31\u53ef\u4ee5\u4e86\uff0c\u4e0b\u6b21\u540c\u6b65\u65f6\u5c31\u4f1a\u6b63\u5e38\u4e86\uff0c\u4f46\u662f\u4f9d\u7136\u4f1a\u6709\u4e0a\u9762\u8bf4\u7684\u90a3\u4e2a\u95ee\u9898\u3002<\/p>\n

                      3.4 replica fetcher \u7ebf\u7a0b\u7684\u5173\u95ed<\/h3>\n

                      replica fetcher \u7ebf\u7a0b\u5173\u95ed\u7684\u6761\u4ef6\uff0c\u5728\u4e09\u79cd\u60c5\u51b5\u4e0b\u4f1a\u5173\u95ed\u5bf9\u8fd9\u4e2a topic-partition \u7684\u62c9\u53d6\u64cd\u4f5c\uff1a<\/p>\n

                        \n
                      1. stopReplica()\uff1abroker \u6536\u5230\u4e86 controller \u53d1\u6765\u7684 StopReplica \u8bf7\u6c42\uff0c\u8fd9\u65f6\u4f1a\u5f00\u59cb\u5173\u95ed\u5bf9\u6307\u5b9a topic-partition \u7684\u540c\u6b65\u7ebf\u7a0b\uff1b<\/li>\n
                      2. makeLeaders\uff1a\u8fd9\u4e9b partition \u7684\u672c\u5730\u526f\u672c\u88ab\u9009\u4e3e\u6210\u4e86 leader\uff0c\u8fd9\u65f6\u5019\u5c31\u4f1a\u5148\u505c\u6b62\u5bf9\u8fd9\u4e9b topic-partition \u526f\u672c\u540c\u6b65\u7ebf\u7a0b\uff1b<\/li>\n
                      3. makeFollowers()\uff1a\u524d\u9762\u5df2\u7ecf\u4ecb\u7ecd\u8fc7\uff0c\u8fd9\u91cc\u5b9e\u9645\u4e0a\u505c\u6b62\u526f\u672c\u540c\u6b65\uff0c\u7136\u540e\u518d\u5f00\u542f\u526f\u672c\u540c\u6b65\u7ebf\u7a0b\uff0c\u56e0\u4e3a\u8fd9\u4e9b topic-partition \u7684 leader \u53ef\u80fd\u53d1\u751f\u4e86\u5207\u6362\u3002<\/li>\n<\/ol>\n

                        \u8fd9\u91cc\u76f4\u63a5\u8bf4\u7ebf\u7a0b\u5173\u95ed\uff0c\u5176\u5b9e\u4e0d\u662f\u5f88\u51c6\u786e\uff0c\u56e0\u4e3a\u6bcf\u4e2a replica fetcher \u7ebf\u7a0b\u64cd\u4f5c\u7684\u662f\u591a\u4e2a topic-partition\uff0c\u800c\u5728\u5173\u95ed\u7684\u7c92\u5ea6\u662f partition \u7ea7\u522b\uff0c\u53ea\u6709\u8fd9\u4e2a\u7ebf\u7a0b\u5206\u914d\u7684 partition \u5168\u90e8\u5173\u95ed\u540e\uff0c\u8fd9\u4e2a\u7ebf\u7a0b\u624d\u4f1a\u771f\u6b63\u88ab\u5173\u95ed\u3002
                        \nstopReplica
                        \nStopReplica \u7684\u8bf7\u6c42\u5b9e\u9645\u4e0a\u662f Controller \u53d1\u9001\u8fc7\u6765\u7684\uff0c\u8fd9\u4e2a\u5728 controller \u90e8\u5206\u4f1a\u8bb2\u8ff0\uff0c\u5b83\u89e6\u53d1\u7684\u6761\u4ef6\u6709\u591a\u79cd\uff0c\u6bd4\u5982\uff1abroker \u4e0b\u7ebf\u3001partition replica \u8fc1\u79fb\u7b49\u7b49\u3002
                        \nmakeLeaders
                        \nmakeLeaders()\u00a0\u65b9\u6cd5\u7684\u8c03\u7528\u662f\u5728 broker \u4e0a\u8fd9\u4e2a partition \u7684\u526f\u672c\u88ab\u8bbe\u7f6e\u4e3a leader \u65f6\u89e6\u53d1\u7684\uff0c\u5176\u5b9e\u73b0\u5982\u4e0b\uff1a<\/p>\n

                        \n
                        \n
                        <\/div>\n
                        <\/div>\n<\/div>\n
                        <\/div>\n<\/div>\n

                        \u8c03\u7528 ReplicaFetcherManager \u7684\u00a0removeFetcherForPartitions()\u00a0\u5220\u9664\u5bf9\u8fd9\u4e9b topic-partition \u7684\u526f\u672c\u540c\u6b65\u8bbe\u7f6e\uff0c\u8fd9\u91cc\u5728\u5b9e\u73b0\u65f6\uff0c\u4f1a\u904d\u5386\u6240\u6709\u7684 replica fetcher \u7ebf\u7a0b\uff0c\u90fd\u6267\u884c\u00a0removePartitions()\u00a0\u65b9\u6cd5\u6765\u79fb\u9664\u5bf9\u5e94\u7684 topic-partition \u96c6\u5408\u3002<\/p>\n

                        \n
                        \n
                        <\/div>\n
                        <\/div>\n<\/div>\n
                        <\/div>\n<\/div>\n

                        removePartitions
                        \n\u8fd9\u4e2a\u65b9\u6cd5\u7684\u4f5c\u7528\u662f\uff1aReplicaFetcherThread \u5c06\u8fd9\u4e9b topic-partition \u4ece\u81ea\u5df1\u8981\u62c9\u53d6\u7684 partition \u5217\u8868\u4e2d\u79fb\u9664\u3002<\/p>\n

                        \n
                        \n
                        <\/div>\n
                        <\/div>\n<\/div>\n<\/div>\n

                        ReplicaFetcherThread\u7684\u5173\u95ed
                        \n\u524d\u9762\u4ecb\u7ecd\u90a3\u4e48\u591a\uff0c\u4f3c\u4e4e\u8fd8\u662f\u6ca1\u6709\u771f\u6b63\u53bb\u5173\u95ed\uff0c\u90a3\u4e48 ReplicaFetcherThread \u771f\u6b63\u5173\u95ed\u662f\u54ea\u91cc\u64cd\u4f5c\u7684\u5462\uff1f
                        \n\u5b9e\u9645\u4e0a ReplicaManager \u6bcf\u6b21\u5904\u7406\u5b8c LeaderAndIsr \u8bf7\u6c42\u540e\uff0c\u90fd\u4f1a\u8c03\u7528 ReplicaFetcherManager \u7684\u00a0shutdownIdleFetcherThreads()\u00a0\u65b9\u6cd5\uff0c\u5982\u679c fetcher \u7ebf\u7a0b\u8981\u62c9\u53d6\u7684 topic-partition \u96c6\u5408\u4e3a\u7a7a\uff0c\u90a3\u4e48\u5c31\u4f1a\u5173\u95ed\u6389\u5bf9\u5e94\u7684 fetcher \u7ebf\u7a0b\u3002<\/p>\n

                        \n
                        \n
                        <\/div>\n
                        <\/div>\n<\/div>\n<\/div>\n<\/article>\n","protected":false},"excerpt":{"rendered":"

                        1 \u524d\u8a00 Kafka\u7684\u6d41\u884c\u5f52\u529f\u4e8e\u5b83\u8bbe\u8ba1\u548c\u64cd\u4f5c\u7b80\u5355\u3001\u5b58\u50a8\u7cfb\u7edf\u9ad8\u6548\u3001\u5145\u5206\u5229\u7528\u78c1\u76d8\u987a\u5e8f\u8bfb\u5199\u7b49\u7279\u6027\u3001\u975e\u5e38\u9002\u5408\u5728\u7ebf\u65e5\u5fd7\u6536 …<\/p>\n

                        kafka replica\u526f\u672c\u540c\u6b65\u673a\u5236<\/span> \u67e5\u770b\u5168\u6587 »<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[127,118],"tags":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"mailpoet_newsletter_max":false,"woocommerce_thumbnail":false,"woocommerce_single":false,"woocommerce_gallery_thumbnail":false,"shop_catalog":false,"shop_single":false,"shop_thumbnail":false},"uagb_author_info":{"display_name":"weijing","author_link":"http:\/\/www.weijing.co\/?author=4"},"uagb_comment_info":0,"uagb_excerpt":"1 \u524d\u8a00 Kafka\u7684\u6d41\u884c\u5f52\u529f\u4e8e\u5b83\u8bbe\u8ba1\u548c\u64cd\u4f5c\u7b80\u5355\u3001\u5b58\u50a8\u7cfb\u7edf\u9ad8\u6548\u3001\u5145\u5206\u5229\u7528\u78c1\u76d8\u987a\u5e8f\u8bfb\u5199\u7b49\u7279\u6027\u3001\u975e\u5e38\u9002\u5408\u5728\u7ebf\u65e5\u5fd7\u6536…","_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1768"}],"collection":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1768"}],"version-history":[{"count":0,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1768\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1768"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}