{"id":27152,"date":"2025-11-13T16:05:00","date_gmt":"2025-11-13T08:05:00","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-tw\/java-application-troubleshooting-guide\/"},"modified":"2025-11-13T16:13:52","modified_gmt":"2025-11-13T08:13:52","slug":"java-application-troubleshooting-guide","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/java-application-troubleshooting-guide\/","title":{"rendered":"Java\u61c9\u7528\u6545\u969c\u8a3a\u65b7\u6307\u5357"},"content":{"rendered":"\n<p>\u5c0d\u65bc\u5728<a href=\"https:\/\/www.varidata.com\/zh-tw\/server\/los-angeles\/\" target=\"_blank\">\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528<\/a>\u6216\u8a17\u7ba1\u74b0\u5883\u4e2d\u57f7\u884c<a href=\"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/optimizing-mysql-connection-pooling-for-java-applications\/\" target=\"_blank\">Java\u61c9\u7528<\/a>\u7684\u958b\u767c\u8207\u7dad\u904b\u4eba\u54e1\u4f86\u8aaa\uff0c\u6545\u969c\u8a3a\u65b7\u65e2\u8981\u7cbe\u901aJava\u6838\u5fc3\u6280\u8853\uff0c\u53c8\u5f97\u719f\u6089\u7f8e\u570b\u57fa\u790e\u8a2d\u65bd\u7684\u7279\u6027\u3002\u8de8\u5340\u57df\u4f3a\u670d\u5668\u4e0a\u7684Java\u61c9\u7528\u9664\u932f\u5e38\u9762\u81e8\u7279\u6b8a\u6311\u6230\u2014\u2014\u6bd4\u5982\u5168\u7403\u7528\u6236\u8207\u7f8e\u570b\u6578\u64da\u4e2d\u5fc3\u7684\u7db2\u8def\u5ef6\u9072\uff0c\u6216\u662f\u8207\u79df\u7528\u786c\u9ad4\u898f\u683c\u7d81\u5b9a\u7684\u8cc7\u6e90\u9650\u5236\u3002\u5ffd\u8996\u9019\u4e9b\u7279\u6027\u53ef\u80fd\u5c0e\u81f4\u505c\u6a5f\u6642\u9593\u5ef6\u9577\u3001\u7528\u6236\u9ad4\u9a57\u4e0b\u6ed1\uff0c\u751a\u81f3\u6839\u6e90\u554f\u984c\u88ab\u8aa4\u5224\u800c\u53cd\u8986\u51fa\u73fe\u3002\u672c\u6307\u5357\u8df3\u812b\u6cdb\u6cdb\u4e4b\u8ac7\uff0c\u63d0\u4f9b\u91dd\u5c0d\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u548c\u8a17\u7ba1\u74b0\u5883\u7684\u5be6\u7528\u7b56\u7565\uff0c\u5e6b\u4f60\u9ad8\u6548\u89e3\u6c7a\u554f\u984c\uff0c\u7121\u9700\u5728\u7121\u95dc\u5efa\u8b70\u4e2d\u6d6a\u8cbb\u6642\u9593\u3002<\/p>\n<h2><strong>1. \u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\/\u8a17\u7ba1\u4e2dJava\u61c9\u7528\u7684\u4e3b\u8981\u6545\u969c\u985e\u578b<\/strong><\/h2>\n<p>\u7f8e\u570b\u57fa\u790e\u8a2d\u65bd\u4e0a\u7684Java\u61c9\u7528\u6545\u969c\u5927\u81f4\u53ef\u6b78\u70ba\u56db\u985e\uff0c\u6bcf\u985e\u90fd\u8207\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\uff08\u5982\u8de8\u5340\u57df\u6d41\u91cf\u3001\u786c\u9ad4\u914d\u7f6e\uff09\u548c\u4f3a\u670d\u5668\u8a17\u7ba1\uff08\u5982\u5171\u7528\u8cc7\u6e90\u9650\u5236\u3001\u81ea\u8a02\u7db2\u8def\u8a2d\u5b9a\uff09\u7684\u7279\u6027\u5bc6\u5207\u76f8\u95dc\uff1a<\/p>\n<ul>\n<li><strong>\u8cc7\u6e90\u74f6\u9838\u6545\u969c<\/strong>\uff1a\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u5e38\u9700\u627f\u8f09\u5168\u7403\u6d41\u91cf\u5cf0\u503c\uff0c\u9019\u6703\u653e\u5927\u8cc7\u6e90\u7d04\u675f\u554f\u984c\u3002\u5178\u578b\u60c5\u6cc1\u5305\u62ec\uff1a\u7f8e\u6b50\u6d41\u91cf\u91cd\u758a\u6642\u6bb5\u52a0\u5287\u7684\u8a18\u61b6\u9ad4\u6d29\u6f0f\u3001JVM\u57f7\u884c\u7dd2\u6c60\u8a2d\u5b9a\u8207\u79df\u7528\u4f3a\u670d\u5668CPU\u6838\u5fc3\u6578\u4e0d\u5339\u914d\u5c0e\u81f4\u7684CPU\u98c6\u5347\u3001\u8a17\u7ba1\u74b0\u5883\u4e2d\u56e0\u65e5\u8a8c\u672a\u8f2a\u8f49\u6216\u5feb\u53d6\u5806\u7a4d\u5f15\u767c\u7684\u78c1\u789f\u7a7a\u9593\u8017\u76e1\u3002<\/li>\n<li><strong>\u8de8\u5340\u57df\u7db2\u8def\u6545\u969c<\/strong>\uff1a\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u4ee5\u670d\u52d9\u5168\u7403\u7528\u6236\u70ba\u6838\u5fc3\uff0c\u7db2\u8def\u554f\u984c\u56e0\u6b64\u6210\u70ba\u4e3b\u8981\u75db\u9ede\u3002\u4f8b\u5982\uff1a\u4e9e\u6d32\/\u6b50\u6d32\u7528\u6236\u8207\u7f8e\u570b\u4f3a\u670d\u5668\u7684\u9023\u7dda\u903e\u6642\u3001\u7f8e\u570b\u6578\u64da\u4e2d\u5fc3\u7279\u5b9a\u9632\u706b\u7246\u6216\u5b89\u5168\u7d44\u898f\u5247\u5c0e\u81f4\u7684\u6514\u622a\u3001\u5168\u7403\u4f7f\u7528\u9ad8\u5cf0\uff08\u5982\u7f8e\u570b\u767d\u5929\u758a\u52a0\u4e9e\u6d32\u591c\u9593\uff09\u6642\u7684\u983b\u5bec\u98fd\u548c\u3002<\/li>\n<li><strong>\u74b0\u5883\u9069\u914d\u6545\u969c<\/strong>\uff1a\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u4e2d\u7684Java\u61c9\u7528\u5e38\u56e0JVM\u53c3\u6578\u8207\u786c\u9ad4\u4e0d\u5339\u914d\u51fa\u554f\u984c\uff08\u5982\u5806\u8a18\u61b6\u9ad4\u8d85\u904e\u5171\u7528\u4f3a\u670d\u5668\u53ef\u7528\u8cc7\u6e90\uff09\u3002\u8a17\u7ba1\u74b0\u5883\u4e2d\uff0cJava\u4f9d\u8cf4\u5eab\u82e5\u8207\u4f3a\u670d\u5668Linux\u767c\u884c\u7248\u6216\u6838\u5fc3\u7248\u672c\u4e0d\u76f8\u5bb9\uff0c\u53ef\u80fd\u5f15\u767c\u885d\u7a81\uff1b\u800c\u8de8\u5340\u57df\u6578\u64da\u5eab\u9023\u7dda\uff08\u5982\u7f8e\u570b\u8a17\u7ba1\u61c9\u7528\u5c0d\u63a5\u6b50\u76df\u6578\u64da\u5eab\uff09\u5247\u6613\u56e0\u5ef6\u9072\u5c0e\u81f4\u903e\u6642\u3002<\/li>\n<li><strong>\u4f75\u767c\u8207\u908f\u8f2f\u6545\u969c<\/strong>\uff1a\u5168\u7403\u7528\u6236\u8a2a\u554f\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u5e36\u4f86\u7684\u9ad8\u4f75\u767c\uff0c\u53ef\u80fd\u89f8\u767c\u7a0b\u5f0f\u78bc\u540c\u6b65\u7f3a\u9677\u5c0e\u81f4\u7684\u6b7b\u9396\u6216\u6d3b\u9396\u3002\u696d\u52d9\u908f\u8f2f\u6545\u969c\u53ef\u80fd\u8868\u73fe\u70ba\uff1a\u8de8\u5340\u57dfAPI\u547c\u53eb\uff08\u5982\u7f8e\u570b\u61c9\u7528\u8acb\u6c42\u4e9e\u6d32\u7b2c\u4e09\u65b9\u670d\u52d9\uff09\u903e\u6642\uff0c\u6216\u7f8e\u570b\u4e3b\u7bc0\u9ede\u5206\u6563\u5f0f\u7cfb\u7d71\u4e2d\u7684\u6578\u64da\u4e0d\u4e00\u81f4\u3002<\/li>\n<\/ul>\n<h2><strong>2. \u7f8e\u570b\u57fa\u790e\u8a2d\u65bd\u4e0aJava\u61c9\u7528\u6545\u969c\u8a3a\u65b7\u7684\u6838\u5fc3\u5de5\u5177<\/strong><\/h2>\n<p>\u9ad8\u6548\u6545\u969c\u8a3a\u65b7\u9700\u8981\u80fd\u929c\u63a5Java\u5c08\u5c6c\u8a3a\u65b7\u8207\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\/\u8a17\u7ba1\u74b0\u5883\u5206\u6790\u7684\u5de5\u5177\u3002\u4ee5\u4e0b\u6309\u8a3a\u65b7\u5c64\u7d1a\u6574\u7406\u4e86\u9069\u5408\u6280\u8853\u4eba\u54e1\u4f7f\u7528\u7684\u5de5\u5177\uff0c\u91cd\u9ede\u8003\u616e\u8207\u7f8e\u570b\u4f3a\u670d\u5668\u8a2d\u5b9a\uff08\u5982Linux\u79df\u7528\u4f3a\u670d\u5668\u3001\u9060\u7aef\u5b58\u53d6\u9650\u5236\uff09\u7684\u76f8\u5bb9\u6027\uff1a<\/p>\n<h3>\u7cfb\u7d71\u7d1a\u5de5\u5177\uff08\u7f8e\u570bLinux\u4f3a\u670d\u5668\u9069\u7528\uff09<\/h3>\n<ul>\n<li><code>top\/htop<\/code>\uff1a\u5373\u6642\u76e3\u63a7CPU\u3001\u8a18\u61b6\u9ad4\u548c\u7a0b\u5e8f\u4f54\u7528\uff0c\u5c0d\u8b58\u5225\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u4e2d\u5171\u7528\u8cc7\u6e90\u7684\u7af6\u722d\u9ede\u975e\u5e38\u95dc\u9375\u3002<\/li>\n<li><code>df\/du<\/code>\uff1a\u78c1\u789f\u7a7a\u9593\u5206\u6790\u5de5\u5177\uff0c\u53ef\u5b9a\u4f4d\u65e5\u8a8c\u6216\u5feb\u53d6\u81a8\u8139\u554f\u984c\u2014\u2014\u9019\u5728\u5132\u5b58\u6709\u9650\u6216\u6709\u56b4\u683c\u4fdd\u7559\u653f\u7b56\u7684\u7f8e\u570b\u8a17\u7ba1\u4f3a\u670d\u5668\u4e2d\u5f88\u5e38\u898b\u3002<\/li>\n<li><code>netstat\/tcpdump<\/code>\uff1a\u7db2\u8def\u9023\u7dda\u8ffd\u8e64\u5de5\u5177\uff0c\u7528\u65bc\u8a3a\u65b7\u8de8\u5340\u57df\u5ef6\u9072\uff08\u5982\u7f8e\u570b\u4f3a\u670d\u5668\u8207\u5168\u7403\u7528\u6236\u7aef\u7684\u5c01\u5305\u907a\u5931\uff09\u6216\u7f8e\u570b\u6578\u64da\u4e2d\u5fc3\u9632\u706b\u7246\u7684\u9023\u63a5\u57e0\u6514\u622a\u3002<\/li>\n<li><code>iostat<\/code>\uff1a\u78c1\u789fI\/O\u76e3\u63a7\u5de5\u5177\uff0c\u53ef\u6aa2\u6e2c\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u4e2d\u7684\u5132\u5b58\u6548\u80fd\u74f6\u9838\uff0c\u9019\u5c0d\u4f9d\u8cf4\u983b\u7e41\u6a94\u6848\u64cd\u4f5c\u7684Java\u61c9\u7528\uff08\u5982\u6578\u64da\u5eab\u670d\u52d9\uff09\u5f71\u97ff\u986f\u8457\u3002<\/li>\n<\/ul>\n<h3>Java\u5c08\u5c6c\u8a3a\u65b7\u5de5\u5177<\/h3>\n<ul>\n<li><code>jps\/jstat<\/code>\uff1a\u8f15\u91cf\u5de5\u5177\uff0c\u7528\u65bc\u5217\u51faJava\u7a0b\u5e8f\u548c\u76e3\u63a7JVM\u6307\u6a19\uff08\u5982GC\u983b\u7387\u3001\u5806\u4f7f\u7528\uff09\uff0c\u958b\u92b7\u6975\u4f4e\uff0c\u9069\u5408\u6709\u8cc7\u6e90\u9650\u5236\u7684\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u3002<\/li>\n<li><code>jmap\/jhat<\/code>\uff1a\u5806\u50be\u5370\u751f\u6210\u8207\u5206\u6790\u5de5\u5177\uff0c\u7528\u65bc\u5b9a\u4f4d\u8a18\u61b6\u9ad4\u6d29\u6f0f\u2014\u2014\u9019\u662f\u7f8e\u570b\u8a17\u7ba1\u4f3a\u670d\u5668\u4e0a\u9577\u671f\u57f7\u884cJava\u61c9\u7528\u7684\u5e38\u898b\u554f\u984c\u3002<\/li>\n<li><code>jstack<\/code>\uff1a\u57f7\u884c\u7dd2\u5806\u758a\u5206\u6790\u5de5\u5177\uff0c\u53ef\u767c\u73fe\u6b7b\u9396\u3001\u963b\u585e\u57f7\u884c\u7dd2\u6216\u7570\u5e38\u57f7\u884c\u7dd2\u6c60\uff0c\u5c0d\u8655\u7406\u5168\u7403\u6d41\u91cf\u7684\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u4e2d\u7684\u9ad8\u4f75\u767cJava\u61c9\u7528\u5fc5\u4e0d\u53ef\u5c11\u3002<\/li>\n<li><code>jcmd<\/code>\uff1a\u591a\u529f\u80fdJVM\u8a3a\u65b7\u5de5\u5177\uff0c\u652f\u63f4\u89f8\u767cGC\u3001\u64f7\u53d6\u57f7\u884c\u7dd2\u50be\u5370\u6216\u67e5\u8a62JVM\u53c3\u6578\uff0c\u76f8\u5bb9\u591a\u6578\u5141\u8a31\u9060\u7aef\u6307\u4ee4\u57f7\u884c\u7684\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u74b0\u5883\u3002<\/li>\n<\/ul>\n<h3>\u805a\u7126\u7f8e\u570b\u57fa\u790e\u8a2d\u65bd\u7684\u76e3\u63a7\u5de5\u5177<\/h3>\n<ul>\n<li>\u958b\u6e90\u76e3\u63a7\u5806\u758a\uff08Prometheus + Grafana\uff09\uff1a\u53ef\u5ba2\u88fd\u5316\u5100\u8868\u677f\uff0c\u540c\u6b65\u8ffd\u8e64Java\u61c9\u7528\u6307\u6a19\uff08\u5982\u56de\u61c9\u6642\u9593\u3001\u932f\u8aa4\u7387\uff09\u8207\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u6307\u6a19\uff08\u5982\u983b\u5bec\u4f7f\u7528\u3001\u4f3a\u670d\u5668\u904b\u884c\u6642\u9593\uff09\u3002<\/li>\n<li>\u65e5\u8a8c\u805a\u5408\u5de5\u5177\uff08ELK\/OpenSearch\uff09\uff1a\u5be6\u73fe\u7f8e\u570b\u8a17\u7ba1\u74b0\u5883\u4e2dJava\u61c9\u7528\u65e5\u8a8c\u7684\u96c6\u4e2d\u7ba1\u7406\uff0c\u4fbf\u65bc\u95dc\u806f\u5206\u6790\u61c9\u7528\u932f\u8aa4\u8207\u4f3a\u670d\u5668\u7d1a\u4e8b\u4ef6\uff08\u5982\u9632\u706b\u7246\u6514\u622a\u3001\u8cc7\u6e90\u6d41\u63a7\uff09\u3002<\/li>\n<li>\u7db2\u8def\u5ef6\u9072\u5de5\u5177\uff08mtr\u3001traceroute\uff09\uff1a\u8de8\u5340\u57df\u8def\u5f91\u5206\u6790\u5de5\u5177\uff0c\u7528\u65bc\u6e2c\u91cf\u7f8e\u570b\u4f3a\u670d\u5668\u8207\u5168\u7403\u7528\u6236\u7aef\u7684\u5ef6\u9072\uff0c\u5b9a\u4f4d\u50b3\u8f38\u7db2\u8def\u4e2d\u7684\u74f6\u9838\u7bc0\u9ede\u3002<\/li>\n<\/ul>\n<h2><strong>3. \u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\/\u8a17\u7ba1\u7684Java\u61c9\u7528\u6545\u969c\u5206\u6b65\u8a3a\u65b7\u6d41\u7a0b<\/strong><\/h2>\n<p>\u7f8e\u570b\u57fa\u790e\u8a2d\u65bd\u4e0a\u7684Java\u61c9\u7528\u6545\u969c\u8a3a\u65b7\u9700\u9075\u5faa\u7d50\u69cb\u5316\u6d41\u7a0b\uff1a\u5148\u6392\u67e5\u74b0\u5883\u7279\u6027\u554f\u984c\uff0c\u518d\u6df1\u5165Java\u5c64\u9762\u5206\u6790\u3002\u6309\u4ee5\u4e0b\u6280\u8853\u4eba\u54e1\u53cb\u597d\u578b\u6b65\u9a5f\u64cd\u4f5c\uff0c\u53ef\u6e1b\u5c11\u505c\u6a5f\u6642\u9593\u4e26\u907f\u514d\u8aa4\u5224\uff1a<\/p>\n<ol>\n<li><strong>\u521d\u59cb\u74b0\u5883\u9a57\u8b49<\/strong>\n<ul>\n<li>\u9a57\u8b49\u4f3a\u670d\u5668\u53ef\u9054\u6027\uff1a\u901a\u904e<code>ping<\/code>\u548cSSH\u78ba\u8a8d\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\/\u8a17\u7ba1\u7bc0\u9ede\u53ef\u5b58\u53d6\uff0c\u6392\u9664\u57fa\u790e\u7db2\u8def\u4e2d\u65b7\u6216\u6578\u64da\u4e2d\u5fc3\u6545\u969c\u3002<\/li>\n<li>\u6aa2\u67e5\u6838\u5fc3\u7cfb\u7d71\u8cc7\u6e90\uff1a\u57f7\u884c<code>top<\/code>\u3001<code>free -m<\/code>\u548c<code>df -h<\/code>\uff0c\u6392\u9664CPU\u3001\u8a18\u61b6\u9ad4\u6216\u78c1\u789f\u8017\u76e1\u2014\u2014\u9019\u662f\u7f8e\u570b\u5171\u7528\u4f3a\u670d\u5668\u79df\u7528\u7684\u5e38\u898b\u5feb\u901f\u6392\u67e5\u9ede\u3002<\/li>\n<li>\u78ba\u8a8dJava\u7a0b\u5e8f\u72c0\u614b\uff1a\u7528<code>jps<\/code>\u6aa2\u67e5\u61c9\u7528\u662f\u5426\u57f7\u884c\uff0c\u901a\u904e<code>netstat -tulpn<\/code>\u9a57\u8b49\u61c9\u7528\u9023\u63a5\u57e0\u76e3\u807d\u72c0\u614b\uff08\u6392\u9664\u9023\u63a5\u57e0\u885d\u7a81\u6216\u7a0b\u5e8f\u7576\u6a5f\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u6545\u969c\u985e\u578b\u5b9a\u4f4d<\/strong>\n<ul>\n<li>\u8cc7\u6e90\u985e\u6545\u969c\uff1a\u82e5CPU\/\u8a18\u61b6\u9ad4\u98c6\u5347\uff0c\u7528<code>jstat<\/code>\u6aa2\u67e5GC\u6d3b\u52d5\uff08\u983b\u7e41GC\u53ef\u80fd\u662f\u5806\u914d\u7f6e\u4e0d\u7576\uff09\uff0c\u6216\u901a\u904e<code>jmap<\/code>\u64f7\u53d6\u5806\u50be\u5370\u5206\u6790\u6d29\u6f0f\u3002<\/li>\n<li>\u7db2\u8def\u985e\u6545\u969c\uff1a\u7528\u6236\u56de\u5831\u903e\u6642\u5f8c\uff0c\u5f9e\u7f8e\u570b\u4f3a\u670d\u5668\u57f7\u884c<code>traceroute<\/code>\u5230\u7528\u6236\u5340\u57df\uff08\u5982\u4e9e\u6d32\uff09\u5b9a\u4f4d\u5ef6\u9072\u5cf0\u503c\uff0c\u540c\u6642\u6aa2\u67e5\u9632\u706b\u7246\u898f\u5247\u662f\u5426\u5141\u8a31\u61c9\u7528\u9023\u63a5\u57e0\u7684\u96d9\u5411\u6d41\u91cf\u3002<\/li>\n<li>\u914d\u7f6e\u985e\u6545\u969c\uff1a\u5c07JVM\u53c3\u6578\uff08\u5982<code>-Xms<\/code>\u3001<code>-Xmx<\/code>\uff09\u8207\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u786c\u9ad4\u898f\u683c\uff08\u5982\u53ef\u7528\u8a18\u61b6\u9ad4\uff09\u6bd4\u5c0d\uff0c\u901a\u904e<code>ldd<\/code>\uff08\u539f\u751f\u5eab\uff09\u6216\u61c9\u7528\u65e5\u8a8c\u6392\u67e5\u4f9d\u8cf4\u885d\u7a81\u3002<\/li>\n<li>\u7a0b\u5f0f\u78bc\u985e\u6545\u969c\uff1a\u65e5\u8a8c\u8a18\u9304\u932f\u8aa4\u6642\uff0c\u7528<code>jstack<\/code>\u6aa2\u6e2c\u6b7b\u9396\uff0c\u5206\u6790\u5806\u758a\u8ffd\u8e64\u4e2d\u7684\u908f\u8f2f\u7f3a\u9677\u2014\u2014\u5c24\u5176\u95dc\u6ce8\u53ef\u80fd\u903e\u6642\u7684\u8de8\u5340\u57dfAPI\u547c\u53eb\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u6839\u6e90\u9a57\u8b49<\/strong>\n<ul>\n<li>\u5fa9\u73fe\u6545\u969c\u5834\u666f\uff1a\u7528<code>ab<\/code>\u6216JMeter\u6a21\u64ec\u5168\u7403\u6d41\u91cf\u6a21\u5f0f\uff0c\u5728\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u74b0\u5883\u4e2d\u91cd\u73fe\u6545\u969c\uff0c\u78ba\u4fdd\u8a3a\u65b7\u74b0\u5883\u4e00\u81f4\u3002<\/li>\n<li>\u95dc\u806f\u6307\u6a19\u5206\u6790\uff1a\u5c07Java\u61c9\u7528\u65e5\u8a8c\u8207\u7f8e\u570b\u4f3a\u670d\u5668\u6307\u6a19\uff08\u5982\u6545\u969c\u6642\u6bb5\u7684\u983b\u5bec\u4f7f\u7528\uff09\u4ea4\u53c9\u6bd4\u5c0d\uff0c\u78ba\u8a8d\u56e0\u679c\u95dc\u4fc2\uff08\u5982\u983b\u5bec\u98fd\u548c\u5f15\u767c\u903e\u6642\uff09\u3002<\/li>\n<li>\u9a57\u8b49\u5047\u8a2d\uff1a\u4f8b\u5982\u61f7\u7591\u5806\u5927\u5c0f\u554f\u984c\u6642\uff0c\u81e8\u6642\u8abf\u6574\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u7684JVM\u53c3\u6578\uff08\u5099\u6709\u56de\u6efe\u65b9\u6848\uff09\uff0c\u76e3\u63a7\u6307\u6a19\u8b8a\u5316\u9a57\u8b49\u63a8\u6e2c\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u89e3\u6c7a\u8207\u9a57\u8b49<\/strong>\n<ul>\n<li>\u5be6\u65bd\u91dd\u5c0d\u6027\u4fee\u5fa9\uff1a\u8abf\u6574JVM\u53c3\u6578\u9069\u914d\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u786c\u9ad4\u3001\u66f4\u65b0\u9632\u706b\u7246\u898f\u5247\u652f\u63f4\u8de8\u5340\u57df\u5b58\u53d6\u3001\u4fee\u88dc\u7a0b\u5f0f\u78bc\u89e3\u6c7a\u4f75\u767c\u554f\u984c\u7b49\u3002<\/li>\n<li>\u4fee\u5fa9\u5f8c\u76e3\u63a7\uff1a\u7528Prometheus\/Grafana\u8ffd\u8e64\u95dc\u9375\u6307\u6a19\uff08\u56de\u61c9\u6642\u9593\u3001\u932f\u8aa4\u7387\uff0924-48\u5c0f\u6642\uff0c\u78ba\u4fdd\u4fee\u5fa9\u5728\u5168\u7403\u8a2a\u554f\u9ad8\u5cf0\u6642\u6bb5\u6709\u6548\u3002<\/li>\n<li>\u8a18\u9304\u74b0\u5883\u7279\u6027\uff1a\u6b78\u6a94\u5f71\u97ff\u89e3\u6c7a\u65b9\u6848\u7684\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\/\u8a17\u7ba1\u7279\u6027\uff08\u5982\u983b\u5bec\u9650\u5236\u3001Linux\u7248\u672c\uff09\uff0c\u70ba\u5f8c\u7e8c\u8a3a\u65b7\u63d0\u4f9b\u53c3\u8003\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2><strong>4. \u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u7279\u5b9a\u6545\u969c\u5834\u666f\u8207\u6280\u8853\u89e3\u6c7a\u65b9\u6848<\/strong><\/h2>\n<p>\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\/\u8a17\u7ba1\u7684Java\u61c9\u7528\u6703\u56e0\u8de8\u5340\u57df\u6d41\u91cf\u3001\u786c\u9ad4\u9650\u5236\u548c\u6578\u64da\u4e2d\u5fc3\u653f\u7b56\u7522\u751f\u7368\u7279\u6545\u969c\u6a21\u5f0f\u3002\u4ee5\u4e0b\u662f\u771f\u5be6\u5834\u666f\u53ca\u53ef\u843d\u5730\u7684\u6280\u8853\u65b9\u6848\uff1a<\/p>\n<h3>\u5834\u666f1\uff1a\u7f8e\u570b\u5171\u7528\u4f3a\u670d\u5668\u79df\u7528\u4e2d\u8a18\u61b6\u9ad4\u6d29\u6f0f\u5c0e\u81f4OOM<\/h3>\n<p><strong>\u75c7\u72c0<\/strong>\uff1a\u7f8e\u6b50\u6d41\u91cf\u91cd\u758a\u9ad8\u5cf0\u6642\uff0cJava\u61c9\u7528\u56e0<code>OutOfMemoryError<\/code>\u7576\u6a5f\uff1b<code>free -m<\/code>\u986f\u793a\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u8a18\u61b6\u9ad4\u8017\u76e1\u3002<\/p>\n<p><strong>\u8a3a\u65b7<\/strong>\uff1a\u901a\u904e<code>jmap -dump:format=b,file=heap.bin &lt;pid&gt;<\/code>\u5f9e\u7f8e\u570b\u4f3a\u670d\u5668\u64f7\u53d6\u5806\u50be\u5370\uff0c\u7528MAT\uff08\u8a18\u61b6\u9ad4\u5206\u6790\u5de5\u5177\uff09\u8b58\u5225\u6eef\u7559\u7269\u4ef6\uff08\u5982\u672a\u95dc\u9589\u7684\u6578\u64da\u5eab\u9023\u7dda\u3001\u672a\u6e05\u7406\u7684\u5feb\u53d6\u6578\u64da\uff09\u3002<\/p>\n<p><strong>\u89e3\u6c7a\u65b9\u6848<\/strong>\uff1a<\/p>\n<ul>\n<li>\u6700\u4f73\u5316JVM\u5806\u53c3\u6578\uff1a\u5c07<code>-Xmx<\/code>\u8a2d\u70ba\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u53ef\u7528\u8a18\u61b6\u9ad4\u768470%\uff08\u907f\u514d\u8207\u5176\u4ed6\u5171\u7528\u61c9\u7528\u7af6\u722d\uff09\uff0c\u555f\u7528<code>-XX:+HeapDumpOnOutOfMemoryError<\/code>\u4fbf\u65bc\u5f8c\u7e8c\u5feb\u901f\u8a3a\u65b7\u3002<\/li>\n<li>\u4fee\u5fa9\u6d29\u6f0f\u7a0b\u5f0f\u78bc\uff1a\u5be6\u73fe\u5e36\u903e\u6642\u7684\u9023\u63a5\u6c60\uff08\u5982HikariCP\u7684maxIdleTime\uff09\uff0c\u70ba\u5feb\u53d6\u6dfb\u52a0\u9a45\u9010\u7b56\u7565\uff08\u5982Caffeine\u5feb\u53d6\u7684\u6700\u5927\u5bb9\u91cf\u9650\u5236\uff09\u3002<\/li>\n<li>\u5b9a\u671f\u5806\u6aa2\u67e5\uff1a\u5728\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u7684crontab\u4e2d\u914d\u7f6e<code>jstat -gcutil &lt;pid&gt; 1000 10<\/code>\uff0c\u7570\u5e38GC\u6d3b\u52d5\u6642\u53ca\u6642\u9810\u8b66\uff0c\u9632\u60a3\u65bc\u672a\u7136\u3002<\/li>\n<\/ul>\n<h3>\u5834\u666f2\uff1a\u7f8e\u570b\u8a17\u7ba1Java\u61c9\u7528\u7684\u8de8\u5340\u57df\u9023\u7dda\u903e\u6642<\/h3>\n<p><strong>\u75c7\u72c0<\/strong>\uff1a\u4e9e\u6d32\u7528\u6236\u8a2a\u554f\u7f8e\u570b\u8a17\u7ba1Java\u61c9\u7528\u6642\u983b\u7e41\u903e\u6642\uff1b<code>tcpdump<\/code>\u986f\u793a\u7f8e\u570b\u4f3a\u670d\u5668\u8207\u4e9e\u6d32\u7528\u6236\u7aef\u7684ACK\u56de\u61c9\u5ef6\u9072\u3002<\/p>\n<p><strong>\u8a3a\u65b7<\/strong>\uff1a\u5f9e\u7f8e\u570b\u8a17\u7ba1\u4f3a\u670d\u5668\u57f7\u884c<code>mtr --report &lt;\u4e9e\u6d32\u7528\u6236\u7aefIP&gt;<\/code>\uff0c\u5b9a\u4f4d\u50b3\u8f38\u8def\u5f91\u4e2d\u7684\u9ad8\u5ef6\u9072\u7bc0\u9ede\u3002\u6aa2\u67e5\u61c9\u7528\u65e5\u8a8c\uff0c\u78ba\u8a8d\u662f\u5426\u5b58\u5728\u7f8e\u570b\u5230\u4e9e\u6d32\u7684\u6578\u64da\u5eab\/API\u547c\u53eb\u5f15\u767c\u7684<code>SocketTimeoutException<\/code>\u3002<\/p>\n<p><strong>\u89e3\u6c7a\u65b9\u6848<\/strong>\uff1a<\/p>\n<ul>\n<li>\u6700\u4f73\u5316\u7db2\u8def\u914d\u7f6e\uff1a\u5728\u7f8e\u570b\u4f3a\u670d\u5668\u555f\u7528TCP\u4fdd\u6d3b\uff08<code>sysctl -w net.ipv4.tcp_keepalive_time=600<\/code>\uff09\uff0c\u5ef6\u9577Java\u61c9\u7528\u7684\u5957\u63a5\u5b57\u903e\u6642\uff08\u5982HTTP\u7528\u6236\u7aef\u8a2d\u5b9a<code>setConnectTimeout(5000)<\/code>\uff09\u3002<\/li>\n<li>\u6e1b\u5c11\u8de8\u5340\u57df\u4f9d\u8cf4\uff1a\u5728\u7f8e\u570b\u8a17\u7ba1\u4f3a\u670d\u5668\u90e8\u7f72\u5feb\u53d6\uff08\u5982Redis\uff09\u5132\u5b58\u9ad8\u983b\u8a2a\u554f\u6578\u64da\uff0c\u964d\u4f4e\u5c0d\u4e9e\u6d32\u670d\u52d9\u7684\u547c\u53eb\u983b\u7387\u3002<\/li>\n<li>\u8abf\u6574\u5b89\u5168\u898f\u5247\uff1a\u66f4\u65b0\u7f8e\u570b\u6578\u64da\u4e2d\u5fc3\u9632\u706b\u7246\/\u5b89\u5168\u7d44\u914d\u7f6e\uff0c\u5141\u8a31\u7528\u6236\u5340\u57df\u7684\u5165\u7ad9\u6d41\u91cf\uff0c\u6e1b\u5c11\u4e0d\u5fc5\u8981\u7684\u5c01\u5305\u6aa2\u67e5\u5ef6\u9072\u3002<\/li>\n<\/ul>\n<h3>\u5834\u666f3\uff1aJVM\u8207\u4f5c\u696d\u7cfb\u7d71\u4e0d\u5339\u914d\u5c0e\u81f4\u7f8e\u570bVPS\u7684CPU\u98c6\u5347<\/h3>\n<p><strong>\u75c7\u72c0<\/strong>\uff1a\u7f8e\u570bVPS\u4e0a\u7684Java\u61c9\u7528CPU\u4f54\u7528\u6301\u7e8c\u8d8590%\uff1b<code>top<\/code>\u986f\u793aJava\u7a0b\u5e8f\u70ba\u4e3b\u8981\u6d88\u8017\u6e90\uff0c\u4f46\u61c9\u7528\u8ca0\u8f09\u8f03\u4f4e\u3002<\/p>\n<p><strong>\u8a3a\u65b7<\/strong>\uff1a\u6bd4\u5c0dJVM\u57f7\u884c\u7dd2\u6c60\u8a2d\u5b9a\uff08\u5982Tomcat\u7684<code>maxThreads<\/code>\uff09\u8207\u7f8e\u570bVPS\u7684CPU\u6838\u5fc3\u6578\uff08<code>lscpu<\/code>\uff09\u3002\u7528<code>jstack<\/code>\u5206\u6790\uff0c\u78ba\u8a8d<code>RUNNABLE<\/code>\u72c0\u614b\u7684\u57f7\u884c\u7dd2\u662f\u5426\u9677\u5165\u5faa\u74b0\u6216\u4f4e\u6548\u8a08\u7b97\u3002<\/p>\n<p><strong>\u89e3\u6c7a\u65b9\u6848<\/strong>\uff1a<\/p>\n<ul>\n<li>\u5c0d\u9f4aJVM\u8207\u786c\u9ad4\uff1a\u5c07<code>-XX:ParallelGCThreads<\/code>\u8a2d\u70ba\u8207CPU\u6838\u5fc3\u6578\u4e00\u81f4\uff08\u59824\u6838\u7f8e\u570bVPS\u914d\u7f6e<code>-XX:ParallelGCThreads=4<\/code>\uff09\uff0c\u8abf\u6574\u57f7\u884c\u7dd2\u6c60\u5927\u5c0f\u907f\u514d\u8cc7\u6e90\u904e\u5ea6\u722d\u6436\u3002<\/li>\n<li>\u6700\u4f73\u5316GC\u6536\u96c6\u5668\uff1a\u5207\u63db\u81f3G1GC\uff08<code>-XX:+UseG1GC<\/code>\uff09\uff0c\u63d0\u5347\u7f8e\u570bVPS\u7684CPU\u6548\u7387\uff0c\u6e1b\u5c11GC\u66ab\u505c\u5e36\u4f86\u7684\u8cc7\u6e90\u6d88\u8017\u3002<\/li>\n<li>\u6700\u4f73\u5316\u4f4e\u6548\u7a0b\u5f0f\u78bc\uff1a\u901a\u904e<code>jprofiler<\/code>\uff08\u9060\u7aef\u6a21\u5f0f\uff09\u5b9a\u4f4dCPU\u5bc6\u96c6\u578b\u65b9\u6cd5\uff0c\u91cd\u69cb\u6f14\u7b97\u6cd5\uff08\u5982\u7528\u4e32\u6d41\u8655\u7406\u6216\u6279\u6b21\u8655\u7406\u66ff\u4ee3\u5de2\u72c0\u8ff4\u5708\uff09\u3002<\/li>\n<\/ul>\n<h2><strong>5. \u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\/\u8a17\u7ba1\u4e2dJava\u61c9\u7528\u7684\u4e3b\u52d5\u9810\u9632\u7b56\u7565<\/strong><\/h2>\n<p>\u6545\u969c\u8a3a\u65b7\u56fa\u7136\u91cd\u8981\uff0c\u4f46\u91dd\u5c0d\u7f8e\u570b\u57fa\u790e\u8a2d\u65bd\u7684\u4e3b\u52d5\u63aa\u65bd\u53ef\u5927\u5e45\u6e1b\u5c11\u6545\u969c\u767c\u751f\u3002\u4ee5\u4e0b\u662f\u6280\u8853\u4eba\u54e1\u8a8d\u53ef\u7684\u7b56\u7565\uff0c\u7528\u65bc\u5f37\u5316\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u548c\u8a17\u7ba1\u74b0\u5883\u4e2d\u7684Java\u61c9\u7528\uff1a<\/p>\n<ul>\n<li><strong>\u74b0\u5883\u9069\u914d\u914d\u7f6e<\/strong>\uff1a\u57fa\u65bc\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u898f\u683c\u81ea\u52d5\u8abf\u6574JVM\u53c3\u6578\uff08\u5982\u7528Ansible\u6839\u64da\u53ef\u7528\u8a18\u61b6\u9ad4\u52d5\u614b\u8a2d\u5b9a<code>-Xmx<\/code>\uff09\u3002\u5728\u4f3a\u670d\u5668\u7684Linux\u767c\u884c\u7248\uff08\u5982Ubuntu 22.04\u3001CentOS Stream\uff09\u4e0a\u6e2c\u8a66Java\u4f9d\u8cf4\uff0c\u907f\u514d\u76f8\u5bb9\u6027\u554f\u984c\u3002<\/li>\n<li><strong>\u8de8\u5340\u57df\u6700\u4f73\u5316<\/strong>\uff1a\u70ba\u5168\u7403\u8a2a\u554f\u8a2d\u8a08Java\u61c9\u7528\uff0c\u5be6\u73fe\u8de8\u5340\u57df\u547c\u53eb\u7684\u6307\u6578\u9000\u907f\u91cd\u8a66\u6a5f\u5236\uff1b\u7528CDN\u52a0\u901f\u975c\u614b\u8cc7\u6e90\uff0c\u7e2e\u77ed\u7528\u6236\u8a2a\u554f\u8def\u5f91\uff1b\u9078\u64c7\u642d\u8f09\u4e00\u7d1aISP\u7684\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\uff0c\u964d\u4f4e\u7db2\u8def\u5ef6\u9072\u3002<\/li>\n<li><strong>\u5f37\u5316\u76e3\u63a7\u8207\u544a\u8b66<\/strong>\uff1a\u90e8\u7f72Prometheus + Grafana\u76e3\u63a7\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u6307\u6a19\uff08\u983b\u5bec\u3001CPU\uff09\u548cJava\u6838\u5fc3\u6307\u6a19\uff08GC\u5ef6\u9072\u3001\u57f7\u884c\u7dd2\u6578\uff09\uff0c\u8a2d\u5b9a\u591a\u7d1a\u544a\u8b66\u95be\u503c\u3002\u642d\u5efa\u65e5\u8a8c\u805a\u5408\u5e73\u53f0\uff0c\u96c6\u4e2d\u7ba1\u7406\u7f8e\u570b\u4f3a\u670d\u5668\u8207Java\u61c9\u7528\u65e5\u8a8c\uff0c\u4fbf\u65bc\u5feb\u901f\u95dc\u806f\u5206\u6790\u3002<\/li>\n<li><strong>\u5408\u898f\u8207\u5f48\u6027\u90e8\u7f72<\/strong>\uff1a\u9075\u5faa\u7f8e\u570b\u6578\u64da\u4e2d\u5fc3\u7684\u8a17\u7ba1\u898f\u7bc4\uff08\u5982\u5197\u9918\u96fb\u6e90\u3001\u7db2\u8def\u6545\u969c\u8f49\u79fb\uff09\uff1b\u5728Java\u61c9\u7528\u4e2d\u6574\u5408\u7194\u65b7\u5668\uff08\u5982Resilience4j\uff09\uff0c\u9632\u6b62\u8de8\u5340\u57df\u670d\u52d9\u4e2d\u65b7\u5f15\u767c\u7d1a\u806f\u6545\u969c\uff1b\u5b9a\u671f\u6e2c\u8a66\u6545\u969c\u8f49\u79fb\u6d41\u7a0b\uff08\u5982\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u4e0a\u7684\u61c9\u7528\u91cd\u555f\uff09\uff0c\u78ba\u4fdd\u5feb\u901f\u6062\u5fa9\u80fd\u529b\u3002<\/li>\n<\/ul>\n<h2><strong>\u7d50\u8a9e\uff1a\u7cbe\u901a\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u8207\u8a17\u7ba1\u7684Java\u6545\u969c\u8a3a\u65b7<\/strong><\/h2>\n<p>\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u548c\u8a17\u7ba1\u74b0\u5883\u4e2d\u7684Java\u61c9\u7528\u6545\u969c\u8a3a\u65b7\uff0c\u9700\u8981\u878d\u5408\u6df1\u539a\u7684Java\u6280\u8853\u529f\u5e95\u8207\u5c0d\u7f8e\u570b\u57fa\u790e\u8a2d\u65bd\u7279\u6027\u7684\u7406\u89e3\u2014\u2014\u5305\u62ec\u8de8\u5340\u57df\u5ef6\u9072\u3001\u5171\u7528\u8cc7\u6e90\u7d04\u675f\u7b49\u3002\u901a\u904e\u7cbe\u6e96\u5206\u985e\u6545\u969c\u3001\u5408\u7406\u904b\u7528\u7cfb\u7d71\u8207Java\u5de5\u5177\u3001\u9075\u5faa\u7d50\u69cb\u5316\u6d41\u7a0b\uff0c\u7dad\u904b\u8207\u958b\u767c\u4eba\u54e1\u80fd\u5feb\u901f\u89e3\u6c7a\u554f\u984c\uff0c\u6700\u5927\u9650\u5ea6\u7e2e\u77ed\u505c\u6a5f\u6642\u9593\u3002\u800c\u74b0\u5883\u9069\u914d\u914d\u7f6e\u3001\u8de8\u5340\u57df\u6700\u4f73\u5316\u7b49\u4e3b\u52d5\u63aa\u65bd\uff0c\u53ef\u9032\u4e00\u6b65\u964d\u4f4e\u6545\u969c\u6982\u7387\uff0c\u78ba\u4fddJava\u61c9\u7528\u5728\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u6216\u8a17\u7ba1\u74b0\u5883\u4e2d\u7a69\u5b9a\u57f7\u884c\uff0c\u70ba\u5168\u7403\u7528\u6236\u63d0\u4f9b\u512a\u8cea\u670d\u52d9\u3002\u7121\u8ad6\u4f60\u662f\u8abf\u8a66\u5171\u7528\u79df\u7528\u4f3a\u670d\u5668\u7684\u8a18\u61b6\u9ad4\u6d29\u6f0f\uff0c\u9084\u662f\u89e3\u6c7a\u8a17\u7ba1\u74b0\u5883\u7684\u8de8\u5340\u57df\u903e\u6642\uff0c\u672c\u6307\u5357\u90fd\u80fd\u63d0\u4f9b\u6280\u8853\u4eba\u54e1\u6240\u9700\u7684\u5be6\u7528\u898b\u89e3\uff0c\u52a9\u4f60\u9ad8\u6548\u8a3a\u65b7\u4e26\u9810\u9632\u5e38\u898b\u554f\u984c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5c0d\u65bc\u5728\u7f8e\u570b\u4f3a\u670d\u5668\u79df\u7528\u6216\u8a17\u7ba1\u74b0\u5883\u4e2d\u57f7\u884cJava\u61c9\u7528\u7684\u958b\u767c\u8207\u7dad\u904b\u4eba\u54e1\u4f86\u8aaa\uff0c\u6545\u969c\u8a3a\u65b7\u65e2\u8981\u7cbe\u901aJava\u6838\u5fc3\u6280\u8853\uff0c\u53c8\u5f97\u719f [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/java-application-troubleshooting-guide\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":12,"featured_media":27149,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[267],"tags":[],"class_list":["post-27152","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-tc"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java\u61c9\u7528\u6545\u969c\u8a3a\u65b7\u6307\u5357<\/title>\n<meta name=\"description\" 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