{"id":821,"date":"2018-07-20T08:34:42","date_gmt":"2018-07-20T00:34:42","guid":{"rendered":"https:\/\/blog.jsjs.org\/?p=821"},"modified":"2018-07-20T08:34:42","modified_gmt":"2018-07-20T00:34:42","slug":"%e3%80%90%e5%88%86%e5%b8%83%e5%bc%8f%e3%80%91zookeeper%e4%bc%9a%e8%af%9d","status":"publish","type":"post","link":"https:\/\/blog.jsjs.org\/?p=821","title":{"rendered":"\u3010\u5206\u5e03\u5f0f\u3011Zookeeper\u4f1a\u8bdd"},"content":{"rendered":"

\u4e00\u3001\u524d\u8a00<\/strong><\/p>\n

\u524d\u9762\u5206\u6790\u4e86Zookeeper\u5ba2\u6237\u7aef\u7684\u7ec6\u8282\uff0c\u63a5\u7740\u7ee7\u7eed\u5b66\u4e60Zookeeper\u4e2d\u7684\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u6982\u5ff5\uff1a\u4f1a\u8bdd\u3002<\/p>\n

\u4e8c\u3001\u4f1a\u8bdd<\/strong><\/p>\n

\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u4e4b\u95f4\u4efb\u4f55\u4ea4\u4e92\u64cd\u4f5c\u90fd\u4e0e\u4f1a\u8bdd\u606f\u606f\u76f8\u5173\uff0c\u5982\u4e34\u65f6\u8282\u70b9\u7684\u751f\u547d\u5468\u671f\u3001\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u987a\u5e8f\u6267\u884c\u3001Watcher\u901a\u77e5\u673a\u5236\u7b49\u3002Zookeeper\u7684\u8fde\u63a5\u4e0e\u4f1a\u8bdd\u5c31\u662f\u5ba2\u6237\u7aef\u901a\u8fc7\u5b9e\u4f8b\u5316Zookeeper\u5bf9\u8c61\u6765\u5b9e\u73b0\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u521b\u5efa\u5e76\u4fdd\u6301TCP\u8fde\u63a5\u7684\u8fc7\u7a0b.<\/p>\n

2.1 \u4f1a\u8bdd\u72b6\u6001<\/p>\n

\u5728Zookeeper\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u6210\u529f\u5b8c\u6210\u8fde\u63a5\u521b\u5efa\u540e\uff0c\u5c31\u521b\u5efa\u4e86\u4e00\u4e2a\u4f1a\u8bdd\uff0cZookeeper\u4f1a\u8bdd\u5728\u6574\u4e2a\u8fd0\u884c\u671f\u95f4\u7684\u751f\u547d\u5468\u671f\u4e2d\uff0c\u4f1a\u5728\u4e0d\u540c\u7684\u4f1a\u8bdd\u72b6\u6001\u4e2d\u4e4b\u95f4\u8fdb\u884c\u5207\u6362\uff0c\u8fd9\u4e9b\u72b6\u6001\u53ef\u4ee5\u5206\u4e3aCONNECTING\u3001CONNECTED\u3001RECONNECTING\u3001RECONNECTED\u3001CLOSE<\/strong>\u7b49\u3002<\/p>\n

\u4e00\u65e6\u5ba2\u6237\u7aef\u5f00\u59cb\u521b\u5efaZookeeper\u5bf9\u8c61\uff0c\u90a3\u4e48\u5ba2\u6237\u7aef\u72b6\u6001\u5c31\u4f1a\u53d8\u6210CONNECTING\u72b6\u6001\uff0c\u540c\u65f6\u5ba2\u6237\u7aef\u5f00\u59cb\u5c1d\u8bd5\u8fde\u63a5\u670d\u52a1\u7aef\uff0c\u8fde\u63a5\u6210\u529f\u540e\uff0c\u5ba2\u6237\u7aef\u72b6\u6001\u53d8\u4e3aCONNECTED\uff0c\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u7531\u4e8e\u65ad\u7f51\u6216\u5176\u4ed6\u539f\u56e0\uff0c\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u4e4b\u95f4\u4f1a\u51fa\u73b0\u65ad\u5f00\u60c5\u51b5\uff0c\u4e00\u65e6\u78b0\u5230\u8fd9\u79cd\u60c5\u51b5\uff0cZookeeper\u5ba2\u6237\u7aef\u4f1a\u81ea\u52a8\u8fdb\u884c\u91cd\u8fde\u670d\u52a1\uff0c\u540c\u65f6\u5ba2\u6237\u7aef\u72b6\u6001\u518d\u6b21\u53d8\u6210CONNCTING\uff0c\u76f4\u5230\u91cd\u65b0\u8fde\u4e0a\u670d\u52a1\u7aef\u540e\uff0c\u72b6\u6001\u53c8\u53d8\u4e3aCONNECTED<\/strong>\uff0c\u5728\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u5ba2\u6237\u7aef\u7684\u72b6\u6001\u603b\u662f\u4ecb\u4e8eCONNECTING\u548cCONNECTED\u4e4b\u95f4\u3002\u4f46\u662f\uff0c\u5982\u679c\u51fa\u73b0\u8bf8\u5982\u4f1a\u8bdd\u8d85\u65f6\u3001\u6743\u9650\u68c0\u67e5\u6216\u662f\u5ba2\u6237\u7aef\u4e3b\u52a8\u9000\u51fa\u7a0b\u5e8f\u7b49\u60c5\u51b5\uff0c\u5ba2\u6237\u7aef\u7684\u72b6\u6001\u5c31\u4f1a\u76f4\u63a5\u53d8\u66f4\u4e3aCLOSE\u72b6\u6001\u3002<\/p>\n

\"\"<\/p>\n

2.2 \u4f1a\u8bdd\u521b\u5efa<\/p>\n

Session\u662fZookeeper\u4e2d\u7684\u4f1a\u8bdd\u5b9e\u4f53\uff0c\u4ee3\u8868\u4e86\u4e00\u4e2a\u5ba2\u6237\u7aef\u4f1a\u8bdd\uff0c\u5176\u5305\u542b\u4e86\u5982\u4e0b\u56db\u4e2a\u5c5e\u6027<\/p>\n

1.\u00a0sessionID<\/strong>\u3002\u4f1a\u8bddID\uff0c\u552f\u4e00\u6807\u8bc6\u4e00\u4e2a\u4f1a\u8bdd\uff0c\u6bcf\u6b21\u5ba2\u6237\u7aef\u521b\u5efa\u65b0\u7684\u4f1a\u8bdd\u65f6\uff0cZookeeper\u90fd\u4f1a\u4e3a\u5176\u5206\u914d\u4e00\u4e2a\u5168\u5c40\u552f\u4e00\u7684sessionID\u3002<\/p>\n

2.\u00a0TimeOut<\/strong>\u3002\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4\uff0c\u5ba2\u6237\u7aef\u5728\u6784\u9020Zookeeper\u5b9e\u4f8b\u65f6\uff0c\u4f1a\u914d\u7f6esessionTimeout\u53c2\u6570\u7528\u4e8e\u6307\u5b9a\u4f1a\u8bdd\u7684\u8d85\u65f6\u65f6\u95f4\uff0cZookeeper\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u7aef\u53d1\u9001\u8fd9\u4e2a\u8d85\u65f6\u65f6\u95f4\u540e\uff0c\u670d\u52a1\u7aef\u4f1a\u6839\u636e\u81ea\u5df1\u7684\u8d85\u65f6\u65f6\u95f4\u9650\u5236\u6700\u7ec8\u786e\u5b9a\u4f1a\u8bdd\u7684\u8d85\u65f6\u65f6\u95f4\u3002<\/p>\n

3.\u00a0TickTime<\/strong>\u3002\u4e0b\u6b21\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4\u70b9\uff0c\u4e3a\u4e86\u4fbf\u4e8eZookeeper\u5bf9\u4f1a\u8bdd\u5b9e\u884c”\u5206\u6876\u7b56\u7565”\u7ba1\u7406\uff0c\u540c\u65f6\u4e3a\u4e86\u9ad8\u6548\u4f4e\u8017\u5730\u5b9e\u73b0\u4f1a\u8bdd\u7684\u8d85\u65f6\u68c0\u67e5\u4e0e\u6e05\u7406\uff0cZookeeper\u4f1a\u4e3a\u6bcf\u4e2a\u4f1a\u8bdd\u6807\u8bb0\u4e00\u4e2a\u4e0b\u6b21\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4\u70b9\uff0c\u5176\u503c\u5927\u81f4\u7b49\u4e8e\u5f53\u524d\u65f6\u95f4\u52a0\u4e0aTimeOut\u3002<\/p>\n

4.\u00a0isClosing<\/strong>\u3002\u6807\u8bb0\u4e00\u4e2a\u4f1a\u8bdd\u662f\u5426\u5df2\u7ecf\u88ab\u5173\u95ed\uff0c\u5f53\u670d\u52a1\u7aef\u68c0\u6d4b\u5230\u4f1a\u8bdd\u5df2\u7ecf\u8d85\u65f6\u5931\u6548\u65f6\uff0c\u4f1a\u5c06\u8be5\u4f1a\u8bdd\u7684isClosing\u6807\u8bb0\u4e3a”\u5df2\u5173\u95ed”\uff0c\u8fd9\u6837\u5c31\u80fd\u786e\u4fdd\u4e0d\u518d\u5904\u7406\u6765\u81ea\u8be5\u4f1a\u8bdd\u7684\u5fc3\u60c5\u6c42\u4e86\u3002<\/p>\n

Zookeeper\u4e3a\u4e86\u4fdd\u8bc1\u8bf7\u6c42\u4f1a\u8bdd\u7684\u5168\u5c40\u552f\u4e00\u6027\uff0c\u5728SessionTracker\u521d\u59cb\u5316\u65f6\uff0c\u8c03\u7528initializeNextSession\u65b9\u6cd5\u751f\u6210\u4e00\u4e2asessionID\uff0c\u4e4b\u540e\u5728Zookeeper\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u4f1a\u5728\u8be5sessionID\u7684\u57fa\u7840\u4e0a\u4e3a\u6bcf\u4e2a\u4f1a\u8bdd\u8fdb\u884c\u5206\u914d\uff0c\u521d\u59cb\u5316\u7b97\u6cd5\u5982\u4e0b<\/p>\n

\n
\"\u590d\u5236\u4ee3\u7801\"<\/a><\/span><\/div>\n
public static long initializeNextSession(long id) {\n    long nextSid = 0;\n    \/\/ \u65e0\u7b26\u53f7\u53f3\u79fb8\u4f4d\u4f7f\u4e3a\u4e86\u907f\u514d\u5de6\u79fb24\u540e\uff0c\u518d\u53f3\u79fb8\u4f4d\u51fa\u73b0\u8d1f\u6570\u800c\u65e0\u6cd5\u901a\u8fc7\u9ad88\u4f4d\u786e\u5b9asid\u503c\n    nextSid = (System.currentTimeMillis() << 24) >>> 8;\n    nextSid = nextSid | (id << 56);\n    return nextSid;\n}<\/pre>\n
\"\u590d\u5236\u4ee3\u7801\"<\/a><\/span><\/div>\n<\/div>\n
\u5176\u4e2d\u7684id\u8868\u793a\u914d\u7f6e\u5728myid\u6587\u4ef6\u4e2d\u7684\u503c\uff0c\u901a\u5e38\u662f\u4e00\u4e2a\u6574\u6570\uff0c\u59821\u30012\u30013\u3002\u8be5\u7b97\u6cd5\u7684\u9ad88\u4f4d\u786e\u5b9a\u4e86\u6240\u5728\u673a\u5668\uff0c\u540e56\u4f4d\u4f7f\u7528\u5f53\u524d\u65f6\u95f4\u7684\u6beb\u79d2\u8868\u793a\u8fdb\u884c\u968f\u673a\u3002SessionTracker\u662fZookeeper\u670d\u52a1\u7aef\u7684\u4f1a\u8bdd\u7ba1\u7406\u5668\uff0c\u8d1f\u8d23\u4f1a\u8bdd\u7684\u521b\u5efa\u3001\u7ba1\u7406\u548c\u6e05\u7406\u7b49\u5de5\u4f5c\u3002<\/p>\n
2.3 \u4f1a\u8bdd\u7ba1\u7406<\/p>\n
Zookeeper\u7684\u4f1a\u8bdd\u7ba1\u7406\u4e3b\u8981\u662f\u901a\u8fc7SessionTracker\u6765\u8d1f\u8d23\uff0c\u5176\u91c7\u7528\u4e86\u5206\u6876\u7b56\u7565<\/strong>\uff08\u5c06\u7c7b\u4f3c\u7684\u4f1a\u8bdd\u653e\u5728\u540c\u4e00\u533a\u5757\u4e2d\u8fdb\u884c\u7ba1\u7406\uff09\u8fdb\u884c\u7ba1\u7406\uff0c\u4ee5\u4fbfZookeeper\u5bf9\u4f1a\u8bdd\u8fdb\u884c\u4e0d\u540c\u533a\u5757\u7684\u9694\u79bb\u5904\u7406\u4ee5\u53ca\u540c\u4e00\u533a\u5757\u7684\u7edf\u4e00\u5904\u7406\u3002<\/p>\n
\"\"<\/p>\n
Zookeeper\u5c06\u6240\u6709\u7684\u4f1a\u8bdd\u90fd\u5206\u914d\u5728\u4e0d\u540c\u7684\u533a\u5757\u4e00\u79cd\uff0c\u5206\u914d\u7684\u539f\u5219\u662f\u6bcf\u4e2a\u4f1a\u8bdd\u7684\u4e0b\u6b21\u8d85\u65f6\u65f6\u95f4\u70b9\uff08ExpirationTime\uff09\u3002ExpirationTime\u6307\u8be5\u4f1a\u8bdd\u6700\u8fd1\u4e00\u6b21\u53ef\u80fd\u8d85\u65f6\u7684\u65f6\u95f4\u70b9\u3002\u540c\u65f6\uff0cZookeeper Leader\u670d\u52a1\u5668\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u4f1a\u5b9a\u65f6\u5730\u8fdb\u884c\u4f1a\u8bdd\u8d85\u65f6\u68c0\u67e5\uff0c\u65f6\u95f4\u95f4\u9694\u662fExpirationInterval\uff0c\u9ed8\u8ba4\u4e3atickTime\u7684\u503c\uff0cExpirationTime\u7684\u8ba1\u7b97\u65f6\u95f4\u5982\u4e0b<\/p>\n
ExpirationTime = ((CurrentTime + SessionTimeOut) \/ ExpirationInterval + 1) * ExpirationInterval<\/p>\n
\u4f1a\u4e86\u4fdd\u6301\u5ba2\u6237\u7aef\u4f1a\u8bdd\u7684\u6709\u6548\u6027\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4\u8fc7\u671f\u8303\u56f4\u5185\u5411\u670d\u52a1\u7aef\u53d1\u9001PING\u8bf7\u6c42\u6765\u4fdd\u6301\u4f1a\u8bdd\u7684\u6709\u6548\u6027\uff08\u5fc3\u8df3\u68c0\u6d4b\uff09<\/strong>\u3002\u540c\u65f6\uff0c\u670d\u52a1\u7aef\u9700\u8981\u4e0d\u65ad\u5730\u63a5\u6536\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u5fc3\u8df3\u68c0\u6d4b\uff0c\u5e76\u4e14\u9700\u8981\u91cd\u65b0\u6fc0\u6d3b\u5bf9\u5e94\u7684\u5ba2\u6237\u7aef\u4f1a\u8bdd\uff0c\u8fd9\u4e2a\u91cd\u65b0\u6fc0\u6d3b\u8fc7\u7a0b\u79f0\u4e3aTouchSession\u3002\u4f1a\u8bdd\u6fc0\u6d3b\u4e0d\u4ec5\u80fd\u591f\u4f7f\u670d\u52a1\u7aef\u68c0\u6d4b\u5230\u5bf9\u5e94\u5ba2\u6237\u7aef\u7684\u5b58\u8d27\u6027\uff0c\u540c\u65f6\u4e5f\u80fd\u8ba9\u5ba2\u6237\u7aef\u81ea\u5df1\u4fdd\u6301\u8fde\u63a5\u72b6\u6001\uff0c\u5176\u6d41\u7a0b\u5982\u4e0b<\/p>\n
\"\"
\n\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u6574\u4e2a\u6d41\u7a0b\u5206\u4e3a\u56db\u6b65<\/p>\n
1.\u00a0\u68c0\u67e5\u8be5\u4f1a\u8bdd\u662f\u5426\u5df2\u7ecf\u88ab\u5173\u95ed<\/strong>\u3002\u82e5\u5df2\u7ecf\u88ab\u5173\u95ed\uff0c\u5219\u76f4\u63a5\u8fd4\u56de\u5373\u53ef\u3002<\/p>\n
2.\u00a0\u8ba1\u7b97\u8be5\u4f1a\u8bdd\u65b0\u7684\u8d85\u65f6\u65f6\u95f4ExpirationTime_New<\/strong>\u3002\u4f7f\u7528\u4e0a\u9762\u63d0\u5230\u7684\u516c\u5f0f\u8ba1\u7b97\u4e0b\u4e00\u6b21\u8d85\u65f6\u65f6\u95f4\u70b9\u3002<\/p>\n
3.\u00a0\u83b7\u53d6\u8be5\u4f1a\u8bdd\u4e0a\u6b21\u8d85\u65f6\u65f6\u95f4ExpirationTime_Old<\/strong>\u3002\u8ba1\u7b97\u8be5\u503c\u662f\u4e3a\u4e86\u5b9a\u4f4d\u5176\u6240\u5728\u7684\u533a\u5757\u3002<\/p>\n
3.\u00a0\u8fc1\u79fb\u4f1a\u8bdd<\/strong>\u3002\u5c06\u8be5\u4f1a\u8bdd\u4ece\u8001\u7684\u533a\u5757\u4e2d\u53d6\u51fa\uff0c\u653e\u5165ExpirationTime_New\u5bf9\u5e94\u7684\u65b0\u533a\u5757\u4e2d\u3002<\/p>\n
\"\"<\/p>\n
\u5728\u4e0a\u9762\u4f1a\u8bdd\u6fc0\u6d3b\u8fc7\u7a0b\u4e2d\uff0c\u53ea\u8981\u5ba2\u6237\u7aef\u53d1\u9001\u5fc3\u8df3\u68c0\u6d4b\uff0c\u670d\u52a1\u7aef\u5c31\u4f1a\u8fdb\u884c\u4e00\u6b21\u4f1a\u8bdd\u6fc0\u6d3b\uff0c\u5fc3\u8df3\u68c0\u6d4b\u7531\u5ba2\u6237\u7aef\u4e3b\u52a8\u53d1\u8d77\uff0c\u4ee5PING\u8bf7\u6c42\u5f62\u5f0f\u5411\u670d\u52a1\u7aef\u53d1\u9001\uff0c\u5728Zookeeper\u7684\u5b9e\u9645\u8bbe\u8ba1\u4e2d\uff0c\u53ea\u8981\u5ba2\u6237\u7aef\u6709\u8bf7\u6c42\u53d1\u9001\u5230\u670d\u52a1\u7aef\uff0c\u90a3\u4e48\u5c31\u4f1a\u89e6\u53d1\u4e00\u6b21\u4f1a\u8bdd\u6fc0\u6d3b<\/strong>\uff0c\u4ee5\u4e0b\u4e24\u79cd\u60c5\u51b5\u90fd\u4f1a\u89e6\u53d1\u4f1a\u8bdd\u6fc0\u6d3b\u3002<\/p>\n
1. \u5ba2\u6237\u7aef\u5411\u670d\u52a1\u7aef\u53d1\u9001\u8bf7\u6c42\uff0c\u5305\u62ec\u8bfb\u5199\u8bf7\u6c42\uff0c\u5c31\u4f1a\u89e6\u53d1\u4f1a\u8bdd\u6fc0\u6d3b\u3002<\/p>\n
2. \u5ba2\u6237\u7aef\u53d1\u73b0\u5728sessionTimeout\/3\u65f6\u95f4\u5185\u5c1a\u672a\u548c\u670d\u52a1\u7aef\u8fdb\u884c\u4efb\u4f55\u901a\u4fe1\uff0c\u90a3\u4e48\u5c31\u4f1a\u4e3b\u52a8\u53d1\u8d77PING\u8bf7\u6c42\uff0c\u670d\u52a1\u7aef\u6536\u5230\u8be5\u8bf7\u6c42\u540e\uff0c\u5c31\u4f1a\u89e6\u53d1\u4f1a\u8bdd\u6fc0\u6d3b\u3002<\/p>\n
\u5bf9\u4e8e\u4f1a\u8bdd\u7684\u8d85\u65f6\u68c0\u67e5\u800c\u8a00\uff0cZookeeper\u4f7f\u7528SessionTracker\u6765\u8d1f\u8d23\uff0cSessionTracker\u4f7f\u7528\u5355\u72ec\u7684\u7ebf\u7a0b\uff08\u8d85\u65f6\u68c0\u67e5\u7ebf\u7a0b\uff09\u4e13\u95e8\u8fdb\u884c\u4f1a\u8bdd\u8d85\u65f6\u68c0\u67e5\uff0c\u5373\u9010\u4e2a\u4e00\u6b21\u5730\u5bf9\u4f1a\u8bdd\u6876\u4e2d\u5269\u4e0b\u7684\u4f1a\u8bdd\u8fdb\u884c\u6e05\u7406\u3002\u5982\u679c\u4e00\u4e2a\u4f1a\u8bdd\u88ab\u6fc0\u6d3b\uff0c\u90a3\u4e48Zookeeper\u5c31\u4f1a\u5c06\u5176\u4ece\u4e0a\u4e00\u4e2a\u4f1a\u8bdd\u6876\u8fc1\u79fb\u5230\u4e0b\u4e00\u4e2a\u4f1a\u8bdd\u6876\u4e2d\uff0c\u5982ExpirationTime 1 \u7684session n \u8fc1\u79fb\u5230ExpirationTime n \u4e2d\uff0c\u6b64\u65f6ExpirationTime 1\u4e2d\u7559\u4e0b\u7684\u6240\u6709\u4f1a\u8bdd\u90fd\u662f\u5c1a\u672a\u88ab\u6fc0\u6d3b\u7684\uff0c\u8d85\u65f6\u68c0\u67e5\u7ebf\u7a0b\u5c31\u5b9a\u65f6\u68c0\u67e5\u8fd9\u4e2a\u4f1a\u8bdd\u6876\u4e2d\u6240\u6709\u5269\u4e0b\u7684\u672a\u88ab\u8fc1\u79fb\u7684\u4f1a\u8bdd\uff0c\u8d85\u65f6\u68c0\u67e5\u7ebf\u7a0b\u53ea\u9700\u8981\u5728\u8fd9\u4e9b\u6307\u5b9a\u65f6\u95f4\u70b9\uff08ExpirationTime 1\u3001ExpirationTime 2…\uff09\u4e0a\u8fdb\u884c\u68c0\u67e5\u5373\u53ef\uff0c\u8fd9\u6837\u63d0\u9ad8\u4e86\u68c0\u67e5\u7684\u6548\u7387\uff0c\u6027\u80fd\u4e5f\u975e\u5e38\u597d\u3002<\/p>\n
2.4 \u4f1a\u8bdd\u6e05\u7406<\/p>\n
\u5f53SessionTracker\u7684\u4f1a\u8bdd\u8d85\u65f6\u7ebf\u7a0b\u68c0\u67e5\u51fa\u5df2\u7ecf\u8fc7\u671f\u7684\u4f1a\u8bdd\u540e\uff0c\u5c31\u5f00\u59cb\u8fdb\u884c\u4f1a\u8bdd\u6e05\u7406\u5de5\u4f5c\uff0c\u5927\u81f4\u53ef\u4ee5\u5206\u4e3a\u5982\u4e0b\u4e03\u6b65\u3002<\/p>\n
1.\u00a0\u6807\u8bb0\u4f1a\u8bdd\u72b6\u6001\u4e3a\u5df2\u5173\u95ed<\/strong>\u3002\u7531\u4e8e\u4f1a\u8bdd\u6e05\u7406\u8fc7\u7a0b\u9700\u8981\u4e00\u6bb5\u65f6\u95f4\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u5728\u6b64\u671f\u95f4\u4e0d\u518d\u5904\u7406\u6765\u81ea\u8be5\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\uff0cSessionTracker\u4f1a\u9996\u5148\u5c06\u8be5\u4f1a\u8bdd\u7684isClosing\u6807\u8bb0\u4e3atrue\uff0c\u8fd9\u6837\u5728\u4f1a\u8bdd\u6e05\u7406\u671f\u95f4\u63a5\u6536\u5230\u8be5\u5ba2\u6237\u7aef\u7684\u5fc3\u60c5\u6c42\u4e5f\u65e0\u6cd5\u7ee7\u7eed\u5904\u7406\u4e86\u3002<\/p>\n
2.\u00a0\u53d1\u8d77\u4f1a\u8bdd\u5173\u95ed\u8bf7\u6c42<\/strong>\u3002\u4e3a\u4e86\u4f7f\u5bf9\u8be5\u4f1a\u8bdd\u7684\u5173\u95ed\u64cd\u4f5c\u5728\u6574\u4e2a\u670d\u52a1\u7aef\u96c6\u7fa4\u90fd\u751f\u6548\uff0cZookeeper\u4f7f\u7528\u4e86\u63d0\u4ea4\u4f1a\u8bdd\u5173\u95ed\u8bf7\u6c42\u7684\u65b9\u5f0f\uff0c\u5e76\u7acb\u5373\u4ea4\u4ed8\u7ed9PreRequestProcessor\u8fdb\u884c\u5904\u7406\u3002<\/p>\n
3.\u00a0\u6536\u96c6\u9700\u8981\u6e05\u7406\u7684\u4e34\u65f6\u8282\u70b9<\/strong>\u3002\u4e00\u65e6\u67d0\u4e2a\u4f1a\u8bdd\u5931\u6548\u540e\uff0c\u90a3\u4e48\u548c\u8be5\u4f1a\u8bdd\u76f8\u5173\u7684\u4e34\u65f6\u8282\u70b9\u90fd\u9700\u8981\u88ab\u6e05\u7406\uff0c\u56e0\u6b64\uff0c\u5728\u6e05\u7406\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5c06\u670d\u52a1\u5668\u4e0a\u6240\u6709\u548c\u8be5\u4f1a\u8bdd\u76f8\u5173\u7684\u4e34\u65f6\u8282\u70b9\u90fd\u6574\u7406\u51fa\u6765\u3002Zookeeper\u5728\u5185\u5b58\u6570\u636e\u5e93\u4e2d\u4f1a\u4e3a\u6bcf\u4e2a\u4f1a\u8bdd\u90fd\u5355\u72ec\u4fdd\u5b58\u4e86\u4e00\u4efd\u7531\u8be5\u4f1a\u8bdd\u7ef4\u62a4\u7684\u6240\u6709\u4e34\u65f6\u8282\u70b9\u96c6\u5408\uff0c\u5728Zookeeper\u5904\u7406\u4f1a\u8bdd\u5173\u95ed\u8bf7\u6c42\u4e4b\u524d\uff0c\u82e5\u6b63\u597d\u6709\u4ee5\u4e0b\u4e24\u7c7b\u8bf7\u6c42\u5230\u8fbe\u4e86\u670d\u52a1\u7aef\u5e76\u6b63\u5728\u5904\u7406\u4e2d\u3002<\/p>\n
\u00b7 \u8282\u70b9\u5220\u9664\u8bf7\u6c42\uff0c\u5220\u9664\u7684\u76ee\u6807\u8282\u70b9\u6b63\u597d\u662f\u4e0a\u8ff0\u4e34\u65f6\u8282\u70b9\u4e2d\u7684\u4e00\u4e2a\u3002<\/p>\n
\u00b7 \u4e34\u65f6\u8282\u70b9\u521b\u5efa\u8bf7\u6c42\uff0c\u521b\u5efa\u7684\u76ee\u6807\u8282\u70b9\u6b63\u597d\u662f\u4e0a\u8ff0\u4e34\u65f6\u8282\u70b9\u4e2d\u7684\u4e00\u4e2a\u3002<\/p>\n
\u5bf9\u4e8e\u7b2c\u4e00\u7c7b\u8bf7\u6c42\uff0c\u9700\u8981\u5c06\u6240\u6709\u8bf7\u6c42\u5bf9\u5e94\u7684\u6570\u636e\u8282\u70b9\u8def\u5f84\u4ece\u5f53\u524d\u4e34\u65f6\u8282\u70b9\u5217\u8868\u4e2d\u79fb\u51fa\uff0c\u4ee5\u907f\u514d\u91cd\u590d\u5220\u9664\uff0c\u5bf9\u4e8e\u7b2c\u4e8c\u7c7b\u8bf7\u6c42\uff0c\u9700\u8981\u5c06\u6240\u6709\u8fd9\u4e9b\u8bf7\u6c42\u5bf9\u5e94\u7684\u6570\u636e\u8282\u70b9\u8def\u5f84\u6dfb\u52a0\u5230\u5f53\u524d\u4e34\u65f6\u8282\u70b9\u5217\u8868\u4e2d\uff0c\u4ee5\u5220\u9664\u8fd9\u4e9b\u5373\u5c06\u88ab\u521b\u5efa\u4f46\u662f\u5c1a\u672a\u4fdd\u5b58\u5230\u5185\u5b58\u6570\u636e\u5e93\u4e2d\u7684\u4e34\u65f6\u8282\u70b9\u3002<\/p>\n
4.\u00a0\u6dfb\u52a0\u8282\u70b9\u5220\u9664\u4e8b\u52a1\u53d8\u66f4<\/strong>\u3002\u5b8c\u6210\u8be5\u4f1a\u8bdd\u76f8\u5173\u7684\u4e34\u65f6\u8282\u70b9\u6536\u96c6\u540e\uff0cZookeeper\u4f1a\u9010\u4e2a\u5c06\u8fd9\u4e9b\u4e34\u65f6\u8282\u70b9\u8f6c\u6362\u6210”\u8282\u70b9\u5220\u9664”\u8bf7\u6c42\uff0c\u5e76\u653e\u5165\u4e8b\u52a1\u53d8\u66f4\u961f\u5217outstandingChanges\u4e2d\u3002<\/p>\n
5.\u00a0\u5220\u9664\u4e34\u65f6\u8282\u70b9<\/strong>\u3002FinalRequestProcessor\u4f1a\u89e6\u53d1\u5185\u5b58\u6570\u636e\u5e93\uff0c\u5220\u9664\u8be5\u4f1a\u8bdd\u5bf9\u5e94\u7684\u6240\u6709\u4e34\u65f6\u8282\u70b9\u3002<\/p>\n
6.\u00a0\u79fb\u9664\u4f1a\u8bdd<\/strong>\u3002\u5b8c\u6210\u8282\u70b9\u5220\u9664\u540e\uff0c\u9700\u8981\u5c06\u4f1a\u8bdd\u4eceSessionTracker\u4e2d\u5220\u9664\u3002<\/p>\n
7.\u00a0\u5173\u95edNIOServerCnxn<\/strong>\u3002\u6700\u540e\uff0c\u4eceNIOServerCnxnFactory\u627e\u5230\u8be5\u4f1a\u8bdd\u5bf9\u5e94\u7684NIOServerCnxn\uff0c\u5c06\u5176\u5173\u95ed\u3002<\/p>\n
2.5 \u91cd\u8fde<\/p>\n
\u5f53\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u4e4b\u95f4\u7684\u7f51\u7edc\u8fde\u63a5\u65ad\u5f00\u65f6\uff0cZookeeper\u5ba2\u6237\u7aef\u4f1a\u81ea\u52a8\u8fdb\u884c\u53cd\u590d\u7684\u91cd\u8fde\uff0c\u76f4\u5230\u6700\u7ec8\u6210\u529f\u8fde\u63a5\u4e0aZookeeper\u96c6\u7fa4\u4e2d\u7684\u4e00\u53f0\u673a\u5668\u3002\u6b64\u65f6\uff0c\u518d\u6b21\u8fde\u63a5\u4e0a\u670d\u52a1\u7aef\u7684\u5ba2\u6237\u7aef\u6709\u53ef\u80fd\u5904\u4e8e\u4ee5\u4e0b\u4e24\u79cd\u72b6\u6001\u4e4b\u4e00<\/p>\n
1.\u00a0CONNECTED<\/strong>\u3002\u5982\u679c\u5728\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4\u5185\u91cd\u65b0\u8fde\u63a5\u4e0a\u96c6\u7fa4\u4e2d\u4e00\u53f0\u670d\u52a1\u5668\u00a0\u3002<\/p>\n
2.\u00a0EXPIRED<\/strong>\u3002\u5982\u679c\u5728\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4\u4ee5\u5916\u91cd\u65b0\u8fde\u63a5\u4e0a\uff0c\u90a3\u4e48\u670d\u52a1\u7aef\u5176\u5b9e\u5df2\u7ecf\u5bf9\u8be5\u4f1a\u8bdd\u8fdb\u884c\u4e86\u4f1a\u8bdd\u6e05\u7406\u64cd\u4f5c\uff0c\u6b64\u65f6\u4f1a\u8bdd\u88ab\u89c6\u4e3a\u975e\u6cd5\u4f1a\u8bdd\u3002<\/p>\n
\u5728\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u4e4b\u95f4\u7ef4\u6301\u7684\u662f\u4e00\u4e2a\u957f\u8fde\u63a5\uff0c\u5728sessionTimeout\u65f6\u95f4\u5185\uff0c\u670d\u52a1\u7aef\u4f1a\u4e0d\u65ad\u5730\u68c0\u6d4b\u8be5\u5ba2\u6237\u7aef\u662f\u5426\u8fd8\u5904\u4e8e\u6b63\u5e38\u8fde\u63a5\uff0c\u670d\u52a1\u7aef\u4f1a\u5c06\u5ba2\u6237\u7aef\u7684\u6bcf\u6b21\u64cd\u4f5c\u89c6\u4e3a\u4e00\u6b21\u6709\u6548\u7684\u5fc3\u8df3\u68c0\u6d4b\u6765\u53cd\u590d\u5730\u8fdb\u884c\u4f1a\u8bdd\u6fc0\u6d3b\u3002\u56e0\u6b64\uff0c\u5728\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u8bdd\u65f6\u4e00\u76f4\u6709\u6548\u7684\u3002\u7136\u800c\uff0c\u5f53\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u4e4b\u95f4\u7684\u8fde\u63a5\u65ad\u5f00\u540e\uff0c\u7528\u6237\u5728\u5ba2\u6237\u7aef\u53ef\u80fd\u4e3b\u8981\u770b\u5230\u4e24\u7c7b\u5f02\u5e38\uff1aCONNECTION_LOSS\uff08\u8fde\u63a5\u65ad\u5f00\uff09\u548cSESSION_EXPIRED\uff08\u4f1a\u8bdd\u8fc7\u671f\uff09<\/strong>\u3002<\/p>\n
1.\u00a0CONNECTION_LOSS<\/strong>\u3002\u6b64\u65f6\uff0c\u5ba2\u6237\u7aef\u4f1a\u81ea\u52a8\u4ece\u5730\u5740\u5217\u8868\u4e2d\u91cd\u65b0\u9010\u4e2a\u9009\u53d6\u65b0\u7684\u5730\u5740\u5e76\u5c1d\u8bd5\u8fdb\u884c\u91cd\u65b0\u8fde\u63a5\uff0c\u76f4\u5230\u6700\u7ec8\u6210\u529f\u8fde\u63a5\u4e0a\u670d\u52a1\u5668\u3002\u82e5\u5ba2\u6237\u7aef\u5728setData\u65f6\u51fa\u73b0\u4e86CONNECTION_LOSS\u73b0\u8c61\uff0c\u6b64\u65f6\u5ba2\u6237\u7aef\u4f1a\u6536\u5230None-Disconnected\u901a\u77e5\uff0c\u540c\u65f6\u4f1a\u629b\u51fa\u5f02\u5e38\u3002\u5e94\u7528\u7a0b\u5e8f\u9700\u8981\u6355\u6349\u5f02\u5e38\u5e76\u4e14\u7b49\u5f85Zookeeper\u5ba2\u6237\u7aef\u81ea\u52a8\u5b8c\u6210\u91cd\u8fde\uff0c\u4e00\u65e6\u91cd\u8fde\u6210\u529f\uff0c\u90a3\u4e48\u5ba2\u6237\u7aef\u4f1a\u6536\u5230None-SyncConnected\u901a\u77e5\uff0c\u4e4b\u540e\u5c31\u53ef\u4ee5\u91cd\u8bd5setData\u64cd\u4f5c\u3002<\/p>\n
2.\u00a0SESSION_EXPIRED<\/strong>\u3002\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u65ad\u5f00\u8fde\u63a5\u540e\uff0c\u91cd\u8fde\u65f6\u95f4\u8017\u65f6\u592a\u957f\uff0c\u8d85\u8fc7\u4e86\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4\u9650\u5236\u540e\u6ca1\u6709\u6210\u529f\u8fde\u4e0a\u670d\u52a1\u5668\uff0c\u670d\u52a1\u5668\u4f1a\u8fdb\u884c\u4f1a\u8bdd\u6e05\u7406\uff0c\u6b64\u65f6\uff0c\u5ba2\u6237\u7aef\u4e0d\u77e5\u9053\u4f1a\u8bdd\u5df2\u7ecf\u5931\u6548\uff0c\u72b6\u6001\u8fd8\u662fDISCONNECTED\uff0c\u5982\u679c\u5ba2\u6237\u7aef\u91cd\u65b0\u8fde\u4e0a\u4e86\u670d\u52a1\u5668\uff0c\u6b64\u65f6\u72b6\u6001\u4e3aSESSION_EXPIRED\uff0c\u7528\u4e8e\u9700\u8981\u91cd\u65b0\u5b9e\u4f8b\u5316Zookeeper\u5bf9\u8c61\uff0c\u5e76\u4e14\u770b\u5e94\u7528\u7684\u590d\u6742\u60c5\u51b5\uff0c\u91cd\u65b0\u6062\u590d\u4e34\u65f6\u6570\u636e\u3002<\/p>\n
3.\u00a0SESSION_MOVED<\/strong>\u3002\u5ba2\u6237\u7aef\u4f1a\u8bdd\u4ece\u4e00\u53f0\u670d\u52a1\u5668\u8f6c\u79fb\u5230\u53e6\u4e00\u53f0\u670d\u52a1\u5668\uff0c\u5373\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aefS1\u65ad\u5f00\u8fde\u63a5\u540e\uff0c\u91cd\u8fde\u4e0a\u4e86\u670d\u52a1\u7aefS2\uff0c\u6b64\u65f6\u4f1a\u8bdd\u5c31\u4eceS1\u8f6c\u79fb\u5230\u4e86S2\u3002\u5f53\u591a\u4e2a\u5ba2\u6237\u7aef\u4f7f\u7528\u76f8\u540c\u7684sessionId\/sessionPasswd\u521b\u5efa\u4f1a\u8bdd\u65f6\uff0c\u4f1a\u6536\u5230SessionMovedException\u5f02\u5e38\u3002\u56e0\u4e3a\u4e00\u65e6\u6709\u7b2c\u4e8c\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u4e0a\u4e86\u670d\u52a1\u7aef\uff0c\u5c31\u88ab\u8ba4\u4e3a\u662f\u4f1a\u8bdd\u8f6c\u79fb\u4e86\u3002<\/p>\n
\u4e09\u3001\u603b\u7ed3<\/strong><\/p>\n
\u672c\u7bc7\u535a\u6587\u4ecb\u7ecd\u4e86Zookeeper\u4f1a\u8bdd\u7684\u76f8\u5173\u7ec6\u8282\uff0c\u901a\u8fc7\u672c\u7bc7\u7684\u5b66\u4e60\u7406\u89e3\u4e86\u4f1a\u8bdd\u7684\u7ec6\u8282\uff0c\u4e5f\u8c22\u8c22\u5404\u4f4d\u56ed\u53cb\u7684\u89c2\u770b~<\/p>\n","protected":false},"excerpt":{"rendered":"
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3.\u00a0TickTime\u3002\u4e0b\u6b21\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4\u70b9\uff0c\u4e3a\u4e86\u4fbf\u4e8eZookeeper\u5bf9\u4f1a\u8bdd\u5b9e\u884c”\u5206\u6876\u7b56\u7565”\u7ba1\u7406\uff0c\u540c\u65f6\u4e3a\u4e86\u9ad8\u6548\u4f4e\u8017\u5730\u5b9e\u73b0\u4f1a\u8bdd\u7684\u8d85\u65f6\u68c0\u67e5\u4e0e\u6e05\u7406\uff0cZookeeper\u4f1a\u4e3a\u6bcf\u4e2a\u4f1a\u8bdd\u6807\u8bb0\u4e00\u4e2a\u4e0b\u6b21\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4\u70b9\uff0c\u5176\u503c\u5927\u81f4\u7b49\u4e8e\u5f53\u524d\u65f6\u95f4\u52a0\u4e0aTimeOut\u3002 4.\u00a0isClosing\u3002\u6807\u8bb0\u4e00\u4e2a\u4f1a\u8bdd\u662f\u5426\u5df2\u7ecf\u88ab\u5173\u95ed\uff0c\u5f53\u670d\u52a1\u7aef\u68c0\u6d4b\u5230\u4f1a\u8bdd\u5df2\u7ecf\u8d85\u65f6\u5931\u6548\u65f6\uff0c\u4f1a\u5c06\u8be5\u4f1a\u8bdd\u7684isClosing\u6807\u8bb0\u4e3a”\u5df2\u5173\u95ed”\uff0c\u8fd9\u6837\u5c31\u80fd\u786e\u4fdd\u4e0d\u518d\u5904\u7406\u6765\u81ea\u8be5\u4f1a\u8bdd\u7684\u5fc3\u60c5\u6c42\u4e86\u3002 Zookeeper\u4e3a\u4e86\u4fdd\u8bc1\u8bf7\u6c42\u4f1a\u8bdd\u7684\u5168\u5c40\u552f\u4e00\u6027\uff0c\u5728SessionTracker\u521d\u59cb\u5316\u65f6\uff0c\u8c03\u7528initializeNextSession\u65b9\u6cd5\u751f\u6210\u4e00\u4e2asessionID\uff0c\u4e4b\u540e\u5728Zookeeper\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u4f1a\u5728\u8be5sessionID\u7684\u57fa\u7840\u4e0a\u4e3a\u6bcf\u4e2a\u4f1a\u8bdd\u8fdb\u884c\u5206\u914d\uff0c\u521d\u59cb\u5316\u7b97\u6cd5\u5982\u4e0b public static long initializeNextSession(long […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","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":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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