{"id":32258,"date":"2025-03-04T09:48:51","date_gmt":"2025-03-04T01:48:51","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=32258"},"modified":"2025-03-04T09:48:51","modified_gmt":"2025-03-04T01:48:51","slug":"%e5%ba%94%e7%94%a8%e6%95%85%e9%9a%9c%e5%ae%9a%e4%bd%8d%e6%97%b6%e5%a6%82%e4%bd%95%e5%a4%84%e7%90%86%e5%a4%9a%e7%ba%bf%e7%a8%8b%e9%97%ae%e9%a2%98%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/32258.html","title":{"rendered":"\u5e94\u7528\u6545\u969c\u5b9a\u4f4d\u65f6\u5982\u4f55\u5904\u7406\u591a\u7ebf\u7a0b\u95ee\u9898\uff1f"},"content":{"rendered":"<p style=\"text-align: center;\">\n<p><img decoding=\"async\" src=\"https:\/\/pic.zadbj010.com\/2025\/c99fee32df37585.jpg\" alt=\"\u5e94\u7528\u6545\u969c\u5b9a\u4f4d\u65f6\u5982\u4f55\u5904\u7406\u591a\u7ebf\u7a0b\u95ee\u9898\uff1f\" ><\/p>\n<\/p>\n<hr>\n<p><strong>\u524d\u8a00<\/strong><br \/>\n\u5728\u6570\u5b57\u5316\u6d6a\u6f6e\u4e2d\uff0c\u8f6f\u4ef6\u7cfb\u7edf\u7684\u590d\u6742\u6027\u5448\u6307\u6570\u7ea7\u589e\u957f\uff0c\u800c\u591a\u7ebf\u7a0b\u6280\u672f\u4f5c\u4e3a\u63d0\u5347\u5e94\u7528\u6027\u80fd\u7684\u5229\u5668\uff0c\u5374\u50cf\u4e00\u628a\u53cc\u5203\u5251\u2014\u2014\u5b83\u65e2\u80fd\u5e26\u6765\u9ad8\u6548\u7684\u5e76\u53d1\u5904\u7406\u80fd\u529b\uff0c\u4e5f\u53ef\u80fd\u56e0\u8bbe\u8ba1\u4e0d\u5f53\u5f15\u53d1\u9690\u853d\u4e14\u68d8\u624b\u7684\u6545\u969c\u3002<em>\u636e\u7edf\u8ba1\uff0c\u8d85\u8fc760%\u7684\u7ebf\u4e0a\u6545\u969c\u4e0e\u591a\u7ebf\u7a0b\u95ee\u9898\u76f8\u5173<\/em>\uff0c\u4f46\u8fd9\u7c7b\u95ee\u9898\u7684\u5b9a\u4f4d\u548c\u4fee\u590d\u5f80\u5f80\u8017\u65f6\u8d39\u529b\uff0c\u751a\u81f3\u9700\u8981\u5f00\u53d1\u8005\u5177\u5907\u201c\u798f\u5c14\u6469\u65af\u5f0f\u201d\u7684\u6d1e\u5bdf\u529b\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u591a\u7ebf\u7a0b\u6545\u969c\u7684\u5178\u578b\u573a\u666f\uff0c\u5e76\u63d0\u4f9b\u4e00\u5957<strong>\u53ef\u843d\u5730\u7684\u8bca\u65ad\u4e0e\u89e3\u51b3\u6846\u67b6<\/strong>\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u5728\u590d\u6742\u5e76\u53d1\u73af\u5883\u4e2d\u5feb\u901f\u5b9a\u4f4d\u95ee\u9898\u6839\u6e90\u3002<\/p>\n<hr>\n<h3 id=\"\u4e00-\u591a\u7ebf\u7a0b\u6545\u969c\u5b9a\u4f4d\u7684\u96be\u70b9\u4e0e\u6838\u5fc3\u6311\u6218\">\u4e00\u3001\u591a\u7ebf\u7a0b\u6545\u969c\u5b9a\u4f4d\u7684\u96be\u70b9\u4e0e\u6838\u5fc3\u6311\u6218<\/h3>\n<p>\u591a\u7ebf\u7a0b\u95ee\u9898\u4e4b\u6240\u4ee5\u88ab\u79f0\u4e3a\u201c\u5f00\u53d1\u8005\u7684\u5669\u68a6\u201d\uff0c\u6e90\u4e8e\u5176\u4e09\u5927\u7279\u6027\uff1a<strong>\u975e\u786e\u5b9a\u6027\u3001\u53ef\u590d\u73b0\u6027\u4f4e\u3001\u5173\u8054\u6027\u5f3a<\/strong>\u3002<\/p>\n<ol>\n<li><strong>\u975e\u786e\u5b9a\u6027<\/strong>\uff1a\u7ebf\u7a0b\u8c03\u5ea6\u53d7\u64cd\u4f5c\u7cfb\u7edf\u3001CPU\u8d1f\u8f7d\u7b49\u56e0\u7d20\u5f71\u54cd\uff0c\u540c\u4e00\u6bb5\u4ee3\u7801\u5728\u4e0d\u540c\u73af\u5883\u4e0b\u53ef\u80fd\u8868\u73b0\u8fe5\u5f02\u3002\u4f8b\u5982\uff0c\u67d0\u4e2a\u5076\u73b0\u7684\u7ade\u6001\u6761\u4ef6\uff08Race Condition\uff09\u53ef\u80fd\u5728\u6d4b\u8bd5\u73af\u5883\u4e2d\u6f5c\u4f0f\u6570\u6708\uff0c\u5374\u5728\u751f\u4ea7\u73af\u5883\u7684\u9ad8\u5e76\u53d1\u538b\u529b\u4e0b\u7a81\u7136\u7206\u53d1\u3002\n<\/li>\n<li><strong>\u53ef\u590d\u73b0\u6027\u4f4e<\/strong>\uff1a\u6b7b\u9501\uff08Deadlock\uff09\u6216\u6d3b\u9501\uff08Livelock\uff09\u7b49\u95ee\u9898\u5e38\u9700\u7279\u5b9a\u65f6\u5e8f\u6761\u4ef6\u89e6\u53d1\uff0c\u5e38\u89c4\u8c03\u8bd5\u624b\u6bb5\u96be\u4ee5\u6355\u6349\u3002\n<\/li>\n<li><strong>\u5173\u8054\u6027\u9677\u9631<\/strong>\uff1a\u7ebf\u7a0b\u95f4\u7684\u8d44\u6e90\u7ade\u4e89\u3001\u72b6\u6001\u5171\u4eab\u53ef\u80fd\u5bfc\u81f4\u95ee\u9898\u94fe\u5f0f\u6269\u6563\uff0c\u4f8b\u5982\u7ebf\u7a0bA\u7684\u8d44\u6e90\u672a\u91ca\u653e\u95f4\u63a5\u5bfc\u81f4\u7ebf\u7a0bB\u8d85\u65f6\u3002\n<\/li>\n<\/ol>\n<p><strong>\u7a81\u7834\u70b9<\/strong>\uff1a\u5efa\u7acb\u201c\u4ece\u73b0\u8c61\u5230\u7ebf\u7a0b\u4ea4\u4e92\u201d\u7684\u6620\u5c04\u601d\u7ef4\uff0c\u901a\u8fc7\u65e5\u5fd7\u589e\u5f3a\u3001\u76d1\u63a7\u57cb\u70b9\u4e0e\u5de5\u5177\u94fe\u7ed3\u5408\uff0c\u5c06\u9690\u5f0f\u95ee\u9898\u663e\u6027\u5316\u3002<\/p>\n<hr>\n<h3 id=\"\u4e8c-\u56db\u7c7b\u5178\u578b\u591a\u7ebf\u7a0b\u95ee\u9898\u53ca\u8bca\u65ad\u65b9\u6cd5\">\u4e8c\u3001\u56db\u7c7b\u5178\u578b\u591a\u7ebf\u7a0b\u95ee\u9898\u53ca\u8bca\u65ad\u65b9\u6cd5<\/h3>\n<h4 id=\"1-\u7ade\u6001\u6761\u4ef6-race-condition\"><strong>1. \u7ade\u6001\u6761\u4ef6\uff08Race Condition\uff09<\/strong><\/h4>\n<p><strong>\u7279\u5f81<\/strong>\uff1a\u4ee3\u7801\u8f93\u51fa\u4f9d\u8d56\u4e8e\u7ebf\u7a0b\u6267\u884c\u987a\u5e8f\uff0c\u5e38\u89c1\u4e8e\u672a\u540c\u6b65\u7684\u5171\u4eab\u8d44\u6e90\u8bbf\u95ee\u3002<br \/>\n<strong>\u6848\u4f8b<\/strong>\uff1a\u7535\u5546\u7cfb\u7edf\u4e2d\u7684\u5e93\u5b58\u6263\u51cf\uff0c\u82e5\u672a\u4f7f\u7528\u539f\u5b50\u64cd\u4f5c\uff0c\u53ef\u80fd\u5bfc\u81f4\u8d85\u5356\u3002<br \/>\n<strong>\u8bca\u65ad\u5de5\u5177<\/strong>\uff1a<\/p>\n<ul>\n<li><strong>\u4ee3\u7801\u7ea7\u68c0\u6d4b<\/strong>\uff1a\u901a\u8fc7\u9759\u6001\u5206\u6790\u5de5\u5177\uff08\u5982FindBugs\uff09\u626b\u63cf<code>synchronized<\/code>\u5173\u952e\u5b57\u7f3a\u5931\u6216<code>volatile<\/code>\u8bef\u7528\u3002\n<\/li>\n<li><strong>\u8fd0\u884c\u65f6\u8ffd\u8e2a<\/strong>\uff1a\u5229\u7528Java Flight Recorder\uff08JFR\uff09\u6355\u83b7\u7ebf\u7a0b\u7ade\u4e89\u70ed\u70b9\uff0c\u6216\u901a\u8fc7<code>jstack<\/code>\u5206\u6790\u7ebf\u7a0b\u963b\u585e\u6808\u3002\n<\/li>\n<\/ul>\n<h4 id=\"2-\u6b7b\u9501-deadlock\"><strong>2. \u6b7b\u9501\uff08Deadlock\uff09<\/strong><\/h4>\n<p><strong>\u7279\u5f81<\/strong>\uff1a\u4e24\u4e2a\u4ee5\u4e0a\u7ebf\u7a0b\u4e92\u76f8\u7b49\u5f85\u5bf9\u65b9\u91ca\u653e\u9501\uff0c\u9677\u5165\u6c38\u4e45\u963b\u585e\u3002<br \/>\n<strong>\u5b9a\u4f4d\u6280\u5de7<\/strong>\uff1a<\/p>\n<ul>\n<li><strong>\u65e5\u5fd7\u5206\u6790<\/strong>\uff1a\u5728\u9501\u83b7\u53d6\/\u91ca\u653e\u4ee3\u7801\u5757\u6dfb\u52a0\u65e5\u5fd7\u6807\u8bb0\uff0c\u8fd8\u539f\u6b7b\u9501\u53d1\u751f\u524d\u7684\u9501\u6301\u6709\u5173\u7cfb\u3002\n<\/li>\n<li><strong>\u5de5\u5177\u4ecb\u5165<\/strong>\uff1a\u4f7f\u7528<code>jstack -l<\/code>\u76f4\u63a5\u68c0\u6d4b\u6b7b\u9501\uff0c\u6216\u901a\u8fc7VisualVM\u7684\u7ebf\u7a0b\u5206\u6790\u89c6\u56fe\u53ef\u89c6\u5316\u9501\u4f9d\u8d56\u94fe\u3002\n<\/li>\n<\/ul>\n<h4 id=\"3-\u7ebf\u7a0b\u6cc4\u9732-thread-leak\"><strong>3. \u7ebf\u7a0b\u6cc4\u9732\uff08Thread Leak\uff09<\/strong><\/h4>\n<p><strong>\u7279\u5f81<\/strong>\uff1a\u7ebf\u7a0b\u6c60\u4e2d\u7ebf\u7a0b\u672a\u6b63\u786e\u56de\u6536\uff0c\u5bfc\u81f4\u5185\u5b58\u8017\u5c3d\u6216\u8d44\u6e90\u4e89\u62a2\u3002<br \/>\n<strong>\u6392\u67e5\u6b65\u9aa4<\/strong>\uff1a<\/p>\n<ul>\n<li><strong>\u76d1\u63a7\u7ebf\u7a0b\u751f\u547d\u5468\u671f<\/strong>\uff1a\u501f\u52a9Micrometer\u96c6\u6210<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">Prometheus<\/a>\uff0c\u8ddf\u8e2a\u7ebf\u7a0b\u6c60\u7684<code>activeThreads<\/code>\u4e0e<code>queueSize<\/code>\u6307\u6807\u3002\n<\/li>\n<li><strong>\u5806\u8f6c\u50a8\u5206\u6790<\/strong>\uff1a\u901a\u8fc7<code>jmap<\/code>\u751f\u6210\u5806\u8f6c\u50a8\u6587\u4ef6\uff0c\u7528MAT\u5de5\u5177\u67e5\u770b\u7ebf\u7a0b\u6808\u7684\u521b\u5efa\u8def\u5f84\uff0c\u8bc6\u522b\u672a\u5173\u95ed\u7684\u8d44\u6e90\u53e5\u67c4\u3002\n<\/li>\n<\/ul>\n<h4 id=\"4-\u4f2a\u5e76\u53d1\u6027\u80fd\u95ee\u9898\"><strong>4. \u4f2a\u5e76\u53d1\u6027\u80fd\u95ee\u9898<\/strong><\/h4>\n<p><strong>\u7279\u5f81<\/strong>\uff1a\u8fc7\u5ea6\u540c\u6b65\u6216\u9501\u7c92\u5ea6\u4e0d\u5408\u7406\uff0c\u5bfc\u81f4\u591a\u7ebf\u7a0b\u9000\u5316\u4e3a\u201c\u4e32\u884c\u6267\u884c\u201d\u3002<br \/>\n<strong>\u4f18\u5316\u7b56\u7565<\/strong>\uff1a<\/p>\n<ul>\n<li><strong>\u9501\u7c92\u5ea6\u62c6\u5206<\/strong>\uff1a\u5c06\u5168\u5c40\u9501\u6539\u4e3a\u5206\u6bb5\u9501\uff08\u5982ConcurrentHashMap\u7684\u8bbe\u8ba1\uff09\u3002\n<\/li>\n<li><strong>\u65e0\u9501\u5316\u6539\u9020<\/strong>\uff1a\u91c7\u7528CAS\u64cd\u4f5c\uff08\u5982AtomicInteger\uff09\u6216\u5e76\u53d1\u5bb9\u5668\uff08\u5982Disruptor\u961f\u5217\uff09\u3002\n<\/li>\n<\/ul>\n<hr>\n<h3 id=\"\u4e09-\u6784\u5efa\u591a\u7ebf\u7a0b\u6545\u969c\u5b9a\u4f4d\u7684\u6280\u672f\u4f53\u7cfb\">\u4e09\u3001\u6784\u5efa\u591a\u7ebf\u7a0b\u6545\u969c\u5b9a\u4f4d\u7684\u6280\u672f\u4f53\u7cfb<\/h3>\n<h4 id=\"1-\u65e5\u5fd7\u589e\u5f3a-\u8ba9\u7ebf\u7a0b-\u5f00\u53e3\u8bf4\u8bdd\"><strong>1. \u65e5\u5fd7\u589e\u5f3a\uff1a\u8ba9\u7ebf\u7a0b\u201c\u5f00\u53e3\u8bf4\u8bdd\u201d<\/strong><\/h4>\n<ul>\n<li>\u5728\u5173\u952e\u540c\u6b65\u4ee3\u7801\u5757\u6dfb\u52a0\u7ebf\u7a0bID\u3001\u65f6\u95f4\u6233\u3001\u9501\u72b6\u6001\u7b49\u4e0a\u4e0b\u6587\u4fe1\u606f\u3002\n<\/li>\n<li>\u4f7f\u7528MDC\uff08Mapped Diagnostic Context\uff09\u5b9e\u73b0\u65e5\u5fd7\u7684\u7ebf\u7a0b\u7ea7\u67d3\u8272\uff0c\u4fbf\u4e8e\u8ffd\u8e2a\u5355\u4e2a\u8bf7\u6c42\u7684\u8de8\u7ebf\u7a0b\u6d41\u8f6c\u3002\n<\/li>\n<\/ul>\n<h4 id=\"2-\u76d1\u63a7\u53ef\u89c6\u5316-\u4ece\u6570\u636e\u4e2d\u627e\u89c4\u5f8b\"><strong>2. \u76d1\u63a7\u53ef\u89c6\u5316\uff1a\u4ece\u6570\u636e\u4e2d\u627e\u89c4\u5f8b<\/strong><\/h4>\n<ul>\n<li><strong>\u6307\u6807\u57cb\u70b9<\/strong>\uff1a\u76d1\u63a7\u7ebf\u7a0b\u6c60\u7684\u6d3b\u8dc3\u5ea6\uff08\u5982<code>thread.active.count<\/code>\uff09\u3001\u4efb\u52a1\u961f\u5217\u5806\u79ef\uff08<code>queue.size<\/code>\uff09\u3001\u4efb\u52a1\u8017\u65f6\u5206\u5e03\uff08<code>task.duration<\/code>\uff09\u3002\n<\/li>\n<li><strong>\u94fe\u8def\u8ffd\u8e2a<\/strong>\uff1a\u96c6\u6210<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">SkyWalking<\/a>\u6216Zipkin\uff0c\u7ed8\u5236\u8de8\u7ebf\u7a0b\u7684\u8c03\u7528\u94fe\uff0c\u8bc6\u522b\u963b\u585e\u70b9\u3002\n<\/li>\n<\/ul>\n<h4 id=\"3-\u5de5\u5177\u94fe\u534f\u540c-\u591a\u7ef4\u4ea4\u53c9\u9a8c\u8bc1\"><strong>3. \u5de5\u5177\u94fe\u534f\u540c\uff1a\u591a\u7ef4\u4ea4\u53c9\u9a8c\u8bc1<\/strong><\/h4>\n<table>\n<thead>\n<tr>\n<th>\u5de5\u5177\u7c7b\u578b<\/th>\n<th>\u4ee3\u8868\u5de5\u5177<\/th>\n<th>\u9002\u7528\u573a\u666f<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u9759\u6001\u5206\u6790<\/strong><\/td>\n<td>SpotBugs\u3001CheckStyle<\/td>\n<td>\u4ee3\u7801\u89c4\u8303\u68c0\u67e5\u3001\u6f5c\u5728\u98ce\u9669\u9884\u8b66<\/td>\n<\/tr>\n<tr>\n<td><strong>\u52a8\u6001\u5206\u6790<\/strong><\/td>\n<td>Arthas\u3001Async Profiler<\/td>\n<td>\u8fd0\u884c\u65f6\u65b9\u6cd5\u8ffd\u8e2a\u3001\u9501\u7ade\u4e89\u5206\u6790<\/td>\n<\/tr>\n<tr>\n<td><strong>\u5185\u5b58\u5206\u6790<\/strong><\/td>\n<td>Eclipse MAT\u3001JProfiler<\/td>\n<td>\u7ebf\u7a0b\u6cc4\u9732\u8bca\u65ad\u3001\u5806\u5185\u5b58\u5feb\u7167\u89e3\u6790<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>\u64cd\u4f5c\u793a\u4f8b<\/strong>\uff1a\u5f53\u53d1\u73b0CPU\u4f7f\u7528\u7387\u5f02\u5e38\u98d9\u5347\u65f6\uff0c\u53ef\u901a\u8fc7<code>Arthas<\/code>\u7684<code>thread -n 3<\/code>\u547d\u4ee4\u5feb\u901f\u5b9a\u4f4d\u6d88\u8017\u8d44\u6e90\u6700\u591a\u7684\u7ebf\u7a0b\uff0c\u518d\u7ed3\u5408<code>jstack<\/code>\u8f93\u51fa\u5206\u6790\u5176\u6808\u5e27\u3002<\/p>\n<hr>\n<h3 id=\"\u56db-\u9632\u5fa1\u6027\u7f16\u7a0b-\u4ece\u6e90\u5934\u964d\u4f4e\u591a\u7ebf\u7a0b\u95ee\u9898\u53d1\u751f\u7387\">\u56db\u3001\u9632\u5fa1\u6027\u7f16\u7a0b\uff1a\u4ece\u6e90\u5934\u964d\u4f4e\u591a\u7ebf\u7a0b\u95ee\u9898\u53d1\u751f\u7387<\/h3>\n<ol>\n<li><strong>\u9650\u5236\u5171\u4eab\u72b6\u6001<\/strong>\uff1a<em>\u201c\u6700\u597d\u7684\u540c\u6b65\u5c31\u662f\u4e0d\u9700\u8981\u540c\u6b65\u201d<\/em>\u2014\u2014\u901a\u8fc7\u7ebf\u7a0b\u5c01\u95ed\uff08ThreadLocal\uff09\u3001\u4e0d\u53ef\u53d8\u5bf9\u8c61\uff08Immutable\uff09\u51cf\u5c11\u5171\u4eab\u53d8\u91cf\u3002\n<\/li>\n<li><strong>\u4f18\u5148\u4f7f\u7528\u9ad8\u9636\u5e76\u53d1\u5de5\u5177<\/strong>\uff1a\u53d6\u4ee3\u624b\u52a8<code>synchronized<\/code>\uff0c\u91c7\u7528<code>ReentrantLock<\/code>\u3001<code>CountDownLatch<\/code>\u7b49JDK\u5e76\u53d1\u7ec4\u4ef6\uff0c\u6216\u4f7f\u7528Akka\/Actor\u6a21\u578b\u5b9e\u73b0\u6d88\u606f\u4f20\u9012\u3002\n<\/li>\n<li><strong>\u538b\u529b\u6d4b\u8bd5\u8986\u76d6\u8fb9\u754c\u6761\u4ef6<\/strong>\uff1a\u5229\u7528JMeter\u6216Gatling\u6a21\u62df\u9ad8\u5e76\u53d1\u573a\u666f\uff0c\u7ed3\u5408Chaos Engineering\u6ce8\u5165\u7ebf\u7a0b\u8c03\u5ea6\u6270\u52a8\uff08\u5982\u968f\u673a\u5ef6\u8fdf\uff09\uff0c\u63d0\u524d\u66b4\u9732\u95ee\u9898\u3002\n<\/li>\n<\/ol>\n<hr>\n<h3 id=\"\u4e94-\u603b\u7ed3-\u4ece-\u6551\u706b-\u5230-\u9632\u706b-\u7684\u601d\u7ef4\u5347\u7ea7\">\u4e94\u3001\u603b\u7ed3\uff1a\u4ece\u201c\u6551\u706b\u201d\u5230\u201c\u9632\u706b\u201d\u7684\u601d\u7ef4\u5347\u7ea7<\/h3>\n<p>\u5728\u591a\u7ebf\u7a0b\u6545\u969c\u5b9a\u4f4d\u4e2d\uff0c<strong>\u53cd\u5e94\u5f0f\u8c03\u8bd5\uff08Reactive Debugging\uff09<\/strong> \u56fa\u7136\u91cd\u8981\uff0c\u4f46\u66f4\u5173\u952e\u5728\u4e8e\u5efa\u7acb<strong>\u4e3b\u52a8\u9884\u9632\u673a\u5236<\/strong>\u2014\u2014\u901a\u8fc7\u4ee3\u7801\u89c4\u8303\u3001\u8bbe\u8ba1\u6a21\u5f0f\u3001\u81ea\u52a8\u5316\u6d4b\u8bd5\u7684\u4e09\u5c42\u9632\u7ebf\uff0c\u5c06\u95ee\u9898\u627c\u6740\u5728\u840c\u82bd\u9636\u6bb5\u3002\u6b63\u5982Google SRE\u624b\u518c\u6240\u8a00\uff1a\u201c<em>\u53ef\u9760\u6027\u4e0d\u662f\u4fee\u590d\u51fa\u6765\u7684\uff0c\u800c\u662f\u8bbe\u8ba1\u51fa\u6765\u7684<\/em>\u201d\u3002\u552f\u6709\u5c06\u5e76\u53d1\u601d\u7ef4\u878d\u5165\u7cfb\u7edf\u8bbe\u8ba1\u7684\u6bcf\u4e2a\u73af\u8282\uff0c\u624d\u80fd\u771f\u6b63\u9a7e\u9a6d\u591a\u7ebf\u7a0b\u8fd9\u628a\u201c\u5229\u5203\u201d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00 \u5728\u6570\u5b57\u5316\u6d6a\u6f6e\u4e2d\uff0c\u8f6f\u4ef6\u7cfb\u7edf\u7684\u590d\u6742\u6027\u5448\u6307\u6570\u7ea7\u589e\u957f\uff0c\u800c\u591a\u7ebf\u7a0b\u6280\u672f\u4f5c\u4e3a\u63d0\u5347\u5e94\u7528\u6027\u80fd\u7684\u5229\u5668\uff0c\u5374\u50cf\u4e00\u628a\u53cc\u5203\u5251\u2014\u2014\u5b83\u65e2\u80fd\u5e26\u6765\u9ad8\u6548\u7684\u5e76\u53d1\u5904\u7406\u80fd\u529b\uff0c\u4e5f\u53ef\u80fd\u56e0\u8bbe\u8ba1\u4e0d\u5f53\u5f15\u53d1\u9690\u853d\u4e14\u68d8\u624b\u7684\u6545\u969c\u3002\u636e\u7edf\u8ba1\uff0c\u8d85\u8fc760%\u7684\u7ebf\u4e0a\u6545\u969c\u4e0e\u591a\u7ebf\u7a0b\u95ee\u9898\u76f8\u5173\uff0c\u4f46\u8fd9\u7c7b\u95ee\u9898\u7684\u5b9a\u4f4d\u548c\u4fee\u590d\u5f80\u5f80\u8017\u65f6\u8d39\u529b\uff0c\u751a\u81f3\u9700\u8981\u5f00\u53d1\u8005\u5177\u5907\u201c\u798f\u5c14\u6469\u65af\u5f0f\u201d\u7684\u6d1e\u5bdf\u529b\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u591a\u7ebf\u7a0b\u6545\u969c\u7684\u5178\u578b\u573a\u666f\uff0c\u5e76\u63d0\u4f9b\u4e00\u5957\u53ef\u843d\u5730\u7684\u8bca\u65ad\u4e0e\u89e3\u51b3\u6846\u67b6\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u5728\u590d\u6742\u5e76\u53d1\u73af\u5883\u4e2d\u5feb\u901f\u5b9a\u4f4d\u95ee\u9898\u6839\u6e90\u3002 \u4e00\u3001\u591a\u7ebf\u7a0b\u6545\u969c\u5b9a\u4f4d\u7684\u96be\u70b9\u4e0e\u6838\u5fc3\u6311\u6218 \u591a\u7ebf\u7a0b\u95ee\u9898\u4e4b\u6240\u4ee5\u88ab\u79f0\u4e3a\u201c\u5f00\u53d1\u8005\u7684\u5669\u68a6\u201d\uff0c\u6e90\u4e8e\u5176\u4e09\u5927\u7279\u6027\uff1a\u975e\u786e\u5b9a\u6027\u3001\u53ef\u590d\u73b0\u6027\u4f4e\u3001\u5173\u8054\u6027\u5f3a\u3002 \u975e\u786e\u5b9a\u6027\uff1a\u7ebf\u7a0b\u8c03\u5ea6\u53d7\u64cd\u4f5c\u7cfb\u7edf\u3001CPU\u8d1f\u8f7d\u7b49\u56e0\u7d20\u5f71\u54cd\uff0c\u540c\u4e00\u6bb5\u4ee3\u7801\u5728\u4e0d\u540c\u73af\u5883\u4e0b\u53ef\u80fd\u8868\u73b0\u8fe5\u5f02\u3002\u4f8b\u5982\uff0c\u67d0\u4e2a\u5076\u73b0\u7684\u7ade\u6001\u6761\u4ef6\uff08Race Condition\uff09\u53ef\u80fd\u5728\u6d4b\u8bd5\u73af\u5883\u4e2d\u6f5c\u4f0f\u6570\u6708\uff0c\u5374\u5728\u751f\u4ea7\u73af\u5883\u7684\u9ad8\u5e76\u53d1\u538b\u529b\u4e0b\u7a81\u7136\u7206\u53d1\u3002 \u53ef\u590d\u73b0\u6027\u4f4e\uff1a\u6b7b\u9501\uff08Deadlock\uff09\u6216\u6d3b\u9501\uff08Livelock\uff09\u7b49\u95ee\u9898\u5e38\u9700\u7279\u5b9a\u65f6\u5e8f\u6761\u4ef6\u89e6\u53d1\uff0c\u5e38\u89c4\u8c03\u8bd5\u624b\u6bb5\u96be\u4ee5\u6355\u6349\u3002 \u5173\u8054\u6027\u9677\u9631\uff1a\u7ebf\u7a0b\u95f4\u7684\u8d44\u6e90\u7ade\u4e89\u3001\u72b6\u6001\u5171\u4eab\u53ef\u80fd\u5bfc\u81f4\u95ee\u9898\u94fe\u5f0f\u6269\u6563\uff0c\u4f8b\u5982\u7ebf\u7a0bA\u7684\u8d44\u6e90\u672a\u91ca\u653e\u95f4\u63a5\u5bfc\u81f4\u7ebf\u7a0bB\u8d85\u65f6\u3002 \u7a81\u7834\u70b9\uff1a\u5efa\u7acb\u201c\u4ece\u73b0\u8c61\u5230\u7ebf\u7a0b\u4ea4\u4e92\u201d\u7684\u6620\u5c04\u601d\u7ef4\uff0c\u901a\u8fc7\u65e5\u5fd7\u589e\u5f3a\u3001\u76d1\u63a7\u57cb\u70b9\u4e0e\u5de5\u5177\u94fe\u7ed3\u5408\uff0c\u5c06\u9690\u5f0f\u95ee\u9898\u663e\u6027\u5316\u3002 \u4e8c\u3001\u56db\u7c7b\u5178\u578b\u591a\u7ebf\u7a0b\u95ee\u9898\u53ca\u8bca\u65ad\u65b9\u6cd5 1. \u7ade\u6001\u6761\u4ef6\uff08Race Condition\uff09 \u7279\u5f81\uff1a\u4ee3\u7801\u8f93\u51fa\u4f9d\u8d56\u4e8e\u7ebf\u7a0b\u6267\u884c\u987a\u5e8f\uff0c\u5e38\u89c1\u4e8e\u672a\u540c\u6b65\u7684\u5171\u4eab\u8d44\u6e90\u8bbf\u95ee\u3002 \u6848\u4f8b\uff1a\u7535\u5546\u7cfb\u7edf\u4e2d\u7684\u5e93\u5b58\u6263\u51cf\uff0c\u82e5\u672a\u4f7f\u7528\u539f\u5b50\u64cd\u4f5c\uff0c\u53ef\u80fd\u5bfc\u81f4\u8d85\u5356\u3002 \u8bca\u65ad\u5de5\u5177\uff1a \u4ee3\u7801\u7ea7\u68c0\u6d4b\uff1a\u901a\u8fc7\u9759\u6001\u5206\u6790\u5de5\u5177\uff08\u5982FindBugs\uff09\u626b\u63cfsynchronized\u5173\u952e\u5b57\u7f3a\u5931\u6216volatile\u8bef\u7528\u3002 \u8fd0\u884c\u65f6\u8ffd\u8e2a\uff1a\u5229\u7528Java Flight Recorder\uff08JFR\uff09\u6355\u83b7\u7ebf\u7a0b\u7ade\u4e89\u70ed\u70b9\uff0c\u6216\u901a\u8fc7jstack\u5206\u6790\u7ebf\u7a0b\u963b\u585e\u6808\u3002 2. \u6b7b\u9501\uff08Deadlock\uff09 \u7279\u5f81\uff1a\u4e24\u4e2a\u4ee5\u4e0a\u7ebf\u7a0b\u4e92\u76f8\u7b49\u5f85\u5bf9\u65b9\u91ca\u653e\u9501\uff0c\u9677\u5165\u6c38\u4e45\u963b\u585e\u3002 \u5b9a\u4f4d\u6280\u5de7\uff1a \u65e5\u5fd7\u5206\u6790\uff1a\u5728\u9501\u83b7\u53d6\/\u91ca\u653e\u4ee3\u7801\u5757\u6dfb\u52a0\u65e5\u5fd7\u6807\u8bb0\uff0c\u8fd8\u539f\u6b7b\u9501\u53d1\u751f\u524d\u7684\u9501\u6301\u6709\u5173\u7cfb\u3002 \u5de5\u5177\u4ecb\u5165\uff1a\u4f7f\u7528jstack -l\u76f4\u63a5\u68c0\u6d4b\u6b7b\u9501\uff0c\u6216\u901a\u8fc7VisualVM\u7684\u7ebf\u7a0b\u5206\u6790\u89c6\u56fe\u53ef\u89c6\u5316\u9501\u4f9d\u8d56\u94fe\u3002 3. \u7ebf\u7a0b\u6cc4\u9732\uff08Thread Leak\uff09 \u7279\u5f81\uff1a\u7ebf\u7a0b\u6c60\u4e2d\u7ebf\u7a0b\u672a\u6b63\u786e\u56de\u6536\uff0c\u5bfc\u81f4\u5185\u5b58\u8017\u5c3d\u6216\u8d44\u6e90\u4e89\u62a2\u3002 \u6392\u67e5\u6b65\u9aa4\uff1a \u76d1\u63a7\u7ebf\u7a0b\u751f\u547d\u5468\u671f\uff1a\u501f\u52a9Micrometer\u96c6\u6210Prometheus\uff0c\u8ddf\u8e2a\u7ebf\u7a0b\u6c60\u7684activeThreads\u4e0equeueSize\u6307\u6807\u3002 \u5806\u8f6c\u50a8\u5206\u6790\uff1a\u901a\u8fc7jmap\u751f\u6210\u5806\u8f6c\u50a8\u6587\u4ef6\uff0c\u7528MAT\u5de5\u5177\u67e5\u770b\u7ebf\u7a0b\u6808\u7684\u521b\u5efa\u8def\u5f84\uff0c\u8bc6\u522b\u672a\u5173\u95ed\u7684\u8d44\u6e90\u53e5\u67c4\u3002 4. \u4f2a\u5e76\u53d1\u6027\u80fd\u95ee\u9898 \u7279\u5f81\uff1a\u8fc7\u5ea6\u540c\u6b65\u6216\u9501\u7c92\u5ea6\u4e0d\u5408\u7406\uff0c\u5bfc\u81f4\u591a\u7ebf\u7a0b\u9000\u5316\u4e3a\u201c\u4e32\u884c\u6267\u884c\u201d\u3002 \u4f18\u5316\u7b56\u7565\uff1a \u9501\u7c92\u5ea6\u62c6\u5206\uff1a\u5c06\u5168\u5c40\u9501\u6539\u4e3a\u5206\u6bb5\u9501\uff08\u5982ConcurrentHashMap\u7684\u8bbe\u8ba1\uff09\u3002 \u65e0\u9501\u5316\u6539\u9020\uff1a\u91c7\u7528CAS\u64cd\u4f5c\uff08\u5982AtomicInteger\uff09\u6216\u5e76\u53d1\u5bb9\u5668\uff08\u5982Disruptor\u961f\u5217\uff09\u3002 \u4e09\u3001\u6784\u5efa\u591a\u7ebf\u7a0b\u6545\u969c\u5b9a\u4f4d\u7684\u6280\u672f\u4f53\u7cfb 1. 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