{"id":87820,"date":"2026-07-30T23:17:08","date_gmt":"2026-07-30T15:17:08","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/87820.html"},"modified":"2026-07-30T23:17:08","modified_gmt":"2026-07-30T15:17:08","slug":"%e9%98%bf%e9%87%8c%e9%9d%a2%e8%af%95%e5%ae%98%e5%bf%85%e9%97%ae%ef%bc%9a%e6%ad%bb%e9%94%81%e5%9b%9b%e5%a4%a7%e5%bf%85%e8%a6%81%e6%9d%a1%e4%bb%b6%ef%bc%81%e5%a6%82%e4%bd%95%e6%8e%92%e6%9f%a5%e3%80%81","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/87820.html","title":{"rendered":"\u963f\u91cc\u9762\u8bd5\u5b98\u5fc5\u95ee\uff1a\u6b7b\u9501\u56db\u5927\u5fc5\u8981\u6761\u4ef6\uff01\u5982\u4f55\u6392\u67e5\u3001\u5982\u4f55\u907f\u514d\uff1f90%Java\u5f00\u53d1\u7b54\u4e0d\u5168\uff01"},"content":{"rendered":"<h2>\u963f\u91cc\u9762\u8bd5\u5b98\u5fc5\u95ee&#xff1a;\u6b7b\u9501\u56db\u5927\u5fc5\u8981\u6761\u4ef6&#xff01;\u5982\u4f55\u6392\u67e5\u3001\u5982\u4f55\u907f\u514d&#xff1f;90%Java\u5f00\u53d1\u7b54\u4e0d\u5168&#xff01;<\/h2>\n<h3>\u524d\u8a00<\/h3>\n<p>Java\u5e76\u53d1\u9762\u8bd5\u8d85\u7ea7\u9ad8\u9891\u538b\u8f74\u9898&#xff1a;\u7ebf\u7a0b\u6b7b\u9501&#xff01;<\/p>\n<p>\u51e0\u4e4e\u6240\u6709\u540e\u7aef\u4e00\u9762\u5fc5\u95ee&#xff1a;<br \/>\n\u6b7b\u9501\u4ea7\u751f\u7684\u56db\u4e2a\u5fc5\u8981\u6761\u4ef6\u662f\u4ec0\u4e48&#xff1f;\u600e\u4e48\u6392\u67e5\u7ebf\u4e0a\u6b7b\u9501&#xff1f;\u9879\u76ee\u4e2d\u5982\u4f55\u5f7b\u5e95\u907f\u514d\u6b7b\u9501&#xff1f;<\/p>\n<p>\u5f88\u591a\u4eba\u53ea\u4f1a\u80cc\u56db\u4e2a\u6761\u4ef6&#xff0c;\u4f46\u662f\u4e0d\u4f1a\u6392\u67e5\u3001\u4e0d\u4f1a\u89c4\u907f\u3001\u8bf4\u4e0d\u51fa\u843d\u5730\u65b9\u6848&#xff0c;\u76f4\u63a5\u9519\u5931\u6ee1\u5206\u3002<\/p>\n<p>\u672c\u6587\u4e00\u6b21\u6027\u8bb2\u900f&#xff1a;\u6b7b\u9501\u56db\u5927\u5fc5\u8981\u6761\u4ef6\u3001\u4ea7\u751f\u539f\u7406\u3001\u7ebf\u4e0a\u6392\u67e5\u624b\u6bb5\u3001\u4f01\u4e1a\u7ea7\u89c4\u907f\u65b9\u6848&#xff0c;\u9762\u8bd5\u76f4\u63a5\u7edd\u6740&#xff01;<\/p>\n<h3>\u4e00\u3001\u4ec0\u4e48\u662f\u6b7b\u9501<\/h3>\n<p>\u6b7b\u9501&#xff1a;<br \/>\n\u4e24\u4e2a\u6216\u591a\u4e2a\u7ebf\u7a0b\u4e92\u76f8\u6301\u6709\u5bf9\u65b9\u9700\u8981\u7684\u9501&#xff0c;\u540c\u65f6\u7b49\u5f85\u5bf9\u65b9\u91ca\u653e\u9501&#xff0c;\u8c01\u90fd\u4e0d\u91ca\u653e\u3001\u8c01\u90fd\u4e0d\u524d\u8fdb&#xff0c;\u7a0b\u5e8f\u6c38\u4e45\u963b\u585e&#xff0c;CPU \u6b63\u5e38\u3001\u4e1a\u52a1\u5361\u6b7b\u3002<\/p>\n<p>\u6b7b\u9501\u4e00\u65e6\u53d1\u751f&#xff0c;\u53ea\u80fd\u91cd\u542f\u670d\u52a1\u89e3\u51b3&#xff0c;\u5371\u5bb3\u6781\u5927\u3002<\/p>\n<h3>\u4e8c\u3001\u6b7b\u9501\u56db\u5927\u5fc5\u8981\u6761\u4ef6&#xff08;\u9762\u8bd5\u5fc5\u80cc&#xff0c;\u7f3a\u4e00\u4e0d\u53ef&#xff09;<\/h3>\n<p>\u91cd\u70b9&#xff1a;\u56db\u4e2a\u6761\u4ef6\u5fc5\u987b\u540c\u65f6\u6ee1\u8db3&#xff0c;\u624d\u4f1a\u4ea7\u751f\u6b7b\u9501&#xff01;<\/p>\n<h4>1. \u4e92\u65a5\u6761\u4ef6<\/h4>\n<p>\u8d44\u6e90\u662f\u72ec\u5360\u7684&#xff0c;\u4e00\u4e2a\u7ebf\u7a0b\u6301\u6709\u9501&#xff0c;\u5176\u4ed6\u7ebf\u7a0b\u65e0\u6cd5\u83b7\u53d6\u3002<br \/>\n&#xff08;synchronized\u3001ReentrantLock \u90fd\u662f\u4e92\u65a5\u9501&#xff09;<\/p>\n<h4>2. \u8bf7\u6c42\u4e0e\u4fdd\u6301\u6761\u4ef6<\/h4>\n<p>\u7ebf\u7a0b\u5df2\u7ecf\u6301\u6709\u4e00\u628a\u9501&#xff0c;\u5728\u4e0d\u91ca\u653e\u7684\u60c5\u51b5\u4e0b&#xff0c;\u7ee7\u7eed\u8bf7\u6c42\u53e6\u4e00\u628a\u9501\u3002<\/p>\n<h4>3. \u4e0d\u53ef\u5265\u593a\u6761\u4ef6<\/h4>\n<p>\u9501\u53ea\u80fd\u81ea\u5df1\u4e3b\u52a8\u91ca\u653e&#xff0c;\u522b\u4eba\u4e0d\u80fd\u5f3a\u884c\u62a2\u5360\u3002<\/p>\n<h4>4. \u5faa\u73af\u7b49\u5f85\u6761\u4ef6<\/h4>\n<p>\u7ebf\u7a0b\u4e4b\u95f4\u5f62\u6210\u95ed\u73af\u7b49\u5f85&#xff1a;<br \/>\n\u7ebf\u7a0bA \u7b49 \u7ebf\u7a0bB \u7684\u9501<br \/>\n\u7ebf\u7a0bB \u7b49 \u7ebf\u7a0bA \u7684\u9501<br \/>\n\u5f62\u6210\u95ed\u73af\u4f9d\u8d56\u3002<\/p>\n<hr \/>\n<h3>\u4e09\u3001\u6838\u5fc3\u539f\u7406&#xff08;\u9762\u8bd5\u52a0\u5206&#xff09;<\/h3>\n<p>\u53ea\u8981\u7834\u574f\u4efb\u610f\u4e00\u4e2a\u6761\u4ef6&#xff0c;\u6b7b\u9501\u5c31\u65e0\u6cd5\u53d1\u751f&#xff01;<br \/>\n\u8fd9\u662f\u6211\u4eec\u907f\u514d\u6b7b\u9501\u7684\u7406\u8bba\u4f9d\u636e\u3002<\/p>\n<h3>\u56db\u3001\u5982\u4f55\u6392\u67e5\u7ebf\u4e0a\u6b7b\u9501&#xff1f;&#xff08;\u5b9e\u6218&#043;\u9762\u8bd5\u5fc5\u95ee&#xff09;<\/h3>\n<h4>1. jstack \u547d\u4ee4\u6392\u67e5&#xff08;\u6700\u5e38\u7528&#xff09;<\/h4>\n<p>jstack <span class=\"token parameter variable\">-l<\/span> \u8fdb\u7a0bID<\/p>\n<p>\u641c\u7d22\u5173\u952e\u5b57&#xff1a;Found one Java-level deadlock<br \/>\n\u76f4\u63a5\u6253\u5370&#xff1a;<\/p>\n<ul>\n<li>\u6b7b\u9501\u7ebf\u7a0b\u540d<\/li>\n<li>\u6b7b\u9501\u9501\u5bf9\u8c61<\/li>\n<li>\u5361\u6b7b\u4ee3\u7801\u884c\u6570<\/li>\n<\/ul>\n<h4>2. \u501f\u52a9 JDK \u81ea\u5e26\u5de5\u5177<\/h4>\n<ul>\n<li>Jconsole\u3001JvisualVM \u53ef\u89c6\u5316\u67e5\u770b\u6b7b\u9501\u7ebf\u7a0b<\/li>\n<\/ul>\n<h4>3. \u7ebf\u4e0a\u7279\u5f81<\/h4>\n<ul>\n<li>\u63a5\u53e3\u8d85\u65f6\u3001\u8bf7\u6c42\u5806\u79ef<\/li>\n<li>\u7ebf\u7a0b\u72b6\u6001\u5927\u91cf BLOCKED<\/li>\n<li>CPU \u4e0d\u9ad8\u3001\u4e1a\u52a1\u5b8c\u5168\u4e0d\u52a8<\/li>\n<\/ul>\n<h3>\u4e94\u3001\u5982\u4f55\u907f\u514d\/\u89e3\u51b3\u6b7b\u9501&#xff1f;&#xff08;\u4f01\u4e1a\u5b9e\u6218\u65b9\u6848&#xff09;<\/h3>\n<p>\u5bf9\u5e94\u56db\u5927\u6761\u4ef6&#xff0c;\u9488\u5bf9\u6027\u7834\u574f&#xff1a;<\/p>\n<h4>1. \u7834\u574f\u300c\u5faa\u73af\u7b49\u5f85\u300d&#xff08;\u6700\u5e38\u7528\u3001\u6700\u6709\u6548&#xff09;<\/h4>\n<p>\u7edf\u4e00\u9501\u83b7\u53d6\u987a\u5e8f<br \/>\n\u6240\u6709\u7ebf\u7a0b\u5fc5\u987b\u6309\u7167\u56fa\u5b9a\u987a\u5e8f\u83b7\u53d6\u591a\u628a\u9501\u3002<br \/>\n\u6bd4\u5982&#xff1a;\u6c38\u8fdc\u5148\u9501A\u3001\u518d\u9501B&#xff0c;\u7edd\u4e0d\u98a0\u5012&#xff0c;\u5f7b\u5e95\u675c\u7edd\u95ed\u73af\u7b49\u5f85\u3002<\/p>\n<h4>2. \u7834\u574f\u300c\u8bf7\u6c42\u4e0e\u4fdd\u6301\u300d<\/h4>\n<p>\u52a0\u9501\u524d\u4e00\u6b21\u6027\u7533\u8bf7\u6240\u6709\u9700\u8981\u7684\u9501&#xff0c;\u4e0d\u6301\u6709\u9501\u518d\u53bb\u7533\u8bf7\u65b0\u9501\u3002<\/p>\n<h4>3. \u7834\u574f\u300c\u4e0d\u53ef\u5265\u593a\u300d<\/h4>\n<p>\u4f7f\u7528 ReentrantLock \u7684 tryLock() \u8d85\u65f6\u83b7\u53d6\u9501<br \/>\n\u62ff\u4e0d\u5230\u9501\u5c31\u4e3b\u52a8\u653e\u5f03\u3001\u91ca\u653e\u5df2\u6709\u9501&#xff0c;\u907f\u514d\u6b7b\u7b49\u3002<\/p>\n<h4>4. \u7f29\u5c0f\u9501\u8303\u56f4<\/h4>\n<p>\u5c3d\u91cf\u51cf\u5c11\u9501\u6301\u6709\u65f6\u95f4&#xff0c;\u4ee3\u7801\u5757\u52a0\u9501&#xff0c;\u4e0d\u8981\u65b9\u6cd5\u52a0\u9501\u3002<\/p>\n<h4>5. \u907f\u514d\u5d4c\u5957\u9501<\/h4>\n<p>\u4e1a\u52a1\u5f00\u53d1\u7981\u6b62\u591a\u5c42\u9501\u5d4c\u5957&#xff0c;90%\u6b7b\u9501\u90fd\u662f\u5d4c\u5957\u9501\u5bfc\u81f4\u3002<\/p>\n<h3>\u516d\u3001\u9762\u8bd5\u6ee1\u5206\u6807\u51c6\u56de\u7b54&#xff08;\u76f4\u63a5\u80cc\u8bf5&#xff09;<\/h3>\n<p>\u6b7b\u9501\u4ea7\u751f\u5fc5\u987b\u540c\u65f6\u6ee1\u8db3\u56db\u5927\u5fc5\u8981\u6761\u4ef6&#xff1a;\u4e92\u65a5\u6761\u4ef6\u3001\u8bf7\u6c42\u4e0e\u4fdd\u6301\u6761\u4ef6\u3001\u4e0d\u53ef\u5265\u593a\u6761\u4ef6\u3001\u5faa\u73af\u7b49\u5f85\u6761\u4ef6\u3002<\/p>\n<p>\u6392\u67e5\u6b7b\u9501\u53ef\u4ee5\u4f7f\u7528 jstack \u547d\u4ee4\u67e5\u770b\u7ebf\u7a0b\u5806\u6808&#xff0c;\u641c\u7d22 deadlock \u5b9a\u4f4d\u5361\u6b7b\u7ebf\u7a0b\u548c\u4ee3\u7801\u4f4d\u7f6e\u3002<\/p>\n<p>\u907f\u514d\u6b7b\u9501\u6838\u5fc3\u662f\u7834\u574f\u4efb\u610f\u4e00\u4e2a\u5fc5\u8981\u6761\u4ef6&#xff0c;\u9879\u76ee\u4e2d\u6700\u5e38\u7528\u65b9\u6848&#xff1a;<br \/>\n\u7edf\u4e00\u9501\u7684\u83b7\u53d6\u987a\u5e8f\u3001\u4f7f\u7528 tryLock \u8d85\u65f6\u673a\u5236\u3001\u7f29\u5c0f\u9501\u7c92\u5ea6\u3001\u675c\u7edd\u9501\u5d4c\u5957\u3001\u4e00\u6b21\u6027\u7533\u8bf7\u6240\u6709\u9501\u3002<\/p>\n<h3>\u4e03\u3001\u9ad8\u9891\u9762\u8bd5\u8bef\u533a<\/h3>\n<p>\u274c \u8bef\u533a1&#xff1a;\u56db\u4e2a\u6761\u4ef6\u6ee1\u8db3\u4e09\u4e2a\u5c31\u4f1a\u6b7b\u9501<br \/>\n\u9519&#xff01;\u5fc5\u987b\u56db\u4e2a\u540c\u65f6\u6ee1\u8db3\u624d\u4f1a\u6b7b\u9501\u3002<\/p>\n<p>\u274c \u8bef\u533a2&#xff1a;\u6b7b\u9501\u662fCPU\u98d9\u5347<br \/>\n\u9519&#xff01;\u6b7b\u9501\u7ebf\u7a0b\u662f BLOCKED&#xff0c;CPU \u5f88\u4f4e&#xff0c;\u4e1a\u52a1\u5361\u6b7b\u3002<\/p>\n<p>\u274c \u8bef\u533a3&#xff1a;synchronized \u53ef\u4ee5\u4e3b\u52a8\u62a2\u5360\u9501<br \/>\n\u9519&#xff01;synchronized \u4e0d\u53ef\u5265\u593a&#xff0c;\u53ea\u80fd\u7b49\u5bf9\u65b9\u91ca\u653e\u3002<\/p>\n<h3>\u603b\u7ed3<\/h3>\n<p>\u6b7b\u9501\u9762\u8bd5\u6838\u5fc3\u5c31\u4e09\u70b9&#xff1a;<\/p>\n<li>\u56db\u5927\u5fc5\u8981\u6761\u4ef6&#xff08;\u540c\u65f6\u6ee1\u8db3&#xff09;<\/li>\n<li>jstack \u6392\u67e5\u65b9\u6848<\/li>\n<li>\u7834\u574f\u5faa\u73af\u7b49\u5f85\u3001\u7edf\u4e00\u52a0\u9501\u987a\u5e8f\u89c4\u907f\u6b7b\u9501<\/li>\n<p>\u5403\u900f\u8fd9\u9053\u9898&#xff0c;\u5e76\u53d1\u57fa\u7840\u9762\u8bd5\u76f4\u63a5\u7a33\u8fc7&#xff01;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u963f\u91cc\u9762\u8bd5\u5b98\u5fc5\u95ee&#xff1a;\u6b7b\u9501\u56db\u5927\u5fc5\u8981\u6761\u4ef6&#xff01;\u5982\u4f55\u6392\u67e5\u3001\u5982\u4f55\u907f\u514d&#xff1f;90%Java\u5f00\u53d1\u7b54\u4e0d\u5168&#xff01;<br \/>\n\u524d\u8a00<br \/>\nJava\u5e76\u53d1\u9762\u8bd5\u8d85\u7ea7\u9ad8\u9891\u538b\u8f74\u9898&#xff1a;\u7ebf\u7a0b\u6b7b\u9501&#xff01;<br 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