{"id":10008014,"date":"2023-06-29T11:20:29","date_gmt":"2023-06-29T03:20:29","guid":{"rendered":"https:\/\/ityet.com\/?p=10008014"},"modified":"2023-06-29T11:20:29","modified_gmt":"2023-06-29T03:20:29","slug":"%e5%a6%82%e4%bd%95%e4%bb%8e%e6%b6%88%e5%a4%b1%e7%9a%84%e5%bc%82%e5%b8%b8%e5%a0%86%e6%a0%88%e5%ae%9a%e4%bd%8d%e7%ba%bf%e4%b8%8a%e9%97%ae%e9%a2%98-%e4%ba%ac%e4%b8%9c%e4%ba%91%e6%8a%80%e6%9c%af","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10008014","title":{"rendered":"\u5982\u4f55\u4ece\u6d88\u5931\u7684\u5f02\u5e38\u5806\u6808\u5b9a\u4f4d\u7ebf\u4e0a\u95ee\u9898 | \u4eac\u4e1c\u4e91\u6280\u672f\u56e2\u961f"},"content":{"rendered":"<h2>\u4e00\u3001\u6d88\u5931\u7684\u5f02\u5e38\u5806\u6808<\/h2>\n<p>\u5728618\u4fdd\u969c\u5927\u4fc3\u7a33\u5b9a\u6027\u8fc7\u7a0b\u4e2d\uff0c\u6d88\u5931\u7684\u5f02\u5e38\u5806\u6808\u53ef\u80fd\u4f1a\u7ed9\u6211\u4eec\u5e26\u6765\u4e25\u91cd\u7684\u9ebb\u70e6\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u5806\u6808\u4fe1\u606f\u662f\u6211\u4eec\u89e3\u51b3\u7ebf\u4e0a\u95ee\u9898\u7684\u5173\u952e\u4e4b\u4e00\u3002\u5982\u4f55\u5feb\u901f\u5b9a\u4f4d\u95ee\u9898\uff1f\u60f3\u5fc5\u5927\u5bb6\u5fc3\u4e2d\u90fd\u6709\u81ea\u5df1\u7684\u7b54\u6848\uff0c\u5f53\u7136\u6700\u7b80\u5355\u76f4\u63a5\u7684\u529e\u6cd5\u8fd8\u662f\u67e5\u627e\u5f02\u5e38\u5806\u6808\u4fe1\u606f\u3002<\/p>\n<p>\u7136\u800c\u6709\u65f6\u5f02\u5e38\u5806\u6808\u5e76\u4e0d\u5b8c\u6574\uff0c\u53ea\u6709\u4e00\u53e5\u63cf\u8ff0\uff0c\u5982\u4e0b\uff1a<\/p>\n<pre><code>Caused by: java.lang.NullPointerException<\/code><\/pre>\n<p>\u9020\u6210\u8fd9\u79cd\u73b0\u8c61\u7684\u539f\u56e0\u5176\u5b9e\u5f88\u7b80\u5355\uff0c\u539f\u56e0\u5982\u4e0b\uff1a<\/p>\n<pre><code>JIT\u7f16\u8bd1\u5668\u5bf9\u5f02\u5e38\u8fdb\u884c\u4e86\u4f18\u5316\uff0c\u5f53\u4ee3\u7801\u4e2d\u7684\u67d0\u4e2a\u4f4d\u7f6e\u629b\u51fa\u540c\u4e00\u4e2a\u5f02\u5e38\u5f88\u591a\u6b21\u540e,\nJIT\u670d\u52a1\u7aef\u7f16\u8bd1\u5668(C2)\u4f1a\u5c06\u5176\u4f18\u5316\u6210\u629b\u51fa\u4e00\u4e2a\u4e8b\u5148\u7f16\u8bd1\u597d\u7684\u3001\u7c7b\u578b\u5339\u914d\u7684\u5f02\u5e38,\u5f02\u5e38\u5806\u6808\u4fe1\u606f\u5c31\u770b\u4e0d\u5230\u4e86\u3002<\/code><\/pre>\n<h2>\u4e8c\u3001Fast Throw<\/h2>\n<p>Fast Throw\uff0c\u5b57\u6bb5\u4e0a\u7406\u89e3\u5c31\u662f\u5feb\u901f\u629b\u5f02\u5e38\uff0c\u76ee\u524d\u9700\u8981\u6ee1\u8db3\u4ee5\u4e0b\u6761\u4ef6\u624d\u6709\u5982\u6b64\u7684\u4f18\u5316\uff1a<\/p>\n<ul>\n<li>\u53ea\u9488\u5bf9HotSpot VM\u624d\u6709, \u4f8b\u5982oracleJDK, libericaJDK\u7b49<\/li>\n<li>\u7279\u5b9a\u4f4d\u7f6e\u629b\u51fa\u5f88\u591a\u6b21,\u5176\u5b9e\u5c31\u662fJIT\u5c06\u5b83\u4f18\u5316\u4e86<\/li>\n<li>JIT\u5fc5\u987b\u4f7f\u7528C2\u624d\u4f1a\u8fd9\u6837\u4f18\u5316,\u4e0d\u629b\u51fa\u539f\u6765\u7684\u5f02\u5e38,\u6539\u7528fast throw\u629b\u51fa<\/li>\n<li>\u8fd9\u662f\u4e00\u4e2a\u4e8b\u5148\u5206\u914d\u597d\u7684\u5f02\u5e38,message\u548c\u5806\u6808\u90fd\u662f\u7a7a\u7684<\/li>\n<\/ul>\n<p>\u53ef\u4ee5\u770b\u51fa,\u5982\u679c\u67d0\u4e2a\u5f02\u5e38\u5728\u540c\u4e00\u4f4d\u7f6e\u88ab\u629b\u51fa\u591a\u6b21,\u4f1a\u88abJIT C2\u4f18\u5316\u6210\u7a7a\u5f02\u5e38,\u4f8b\u5982\u672c\u6587\u7684NullPointerException,\u65e2\u6ca1\u6709message,\u4e5f\u6ca1\u6709\u5806\u6808.\u4f46\u4ed6\u7684\u901f\u5ea6\u975e\u5e38\u5feb,\u4e0d\u7528\u5206\u914d\u5185\u5b58\u548c\u83b7\u53d6\u5806\u6808.<\/p>\n<p>\u5982\u679c\u60f3\u5173\u95ed\u8fd9\u4e2a\u4f18\u5316,\u8bbe\u7f6e-XX:-OmitStackTraceInFastThrow\u5373\u53ef\u3002<\/p>\n<p>\u5b58\u5728\u5373\u5408\u7406\uff0c\u65e2\u7136\u5b58\u5728fast throw\u7684\u4f18\u5316\uff0c\u5fc5\u7136\u6709\u5176\u4ef7\u503c\u3002fast throw\u4f18\u5316\u7684\u539f\u56e0\u662f\u4e3a\u4e86\u63d0\u9ad8\u6027\u80fd\u3002\u5f53\u540c\u4e00\u79cd\u5f02\u5e38\u5728\u76f8\u540c\u7684\u4f4d\u7f6e\u88ab\u629b\u51fa\u591a\u6b21\uff0c\u7f16\u8bd1\u5668\u5c31\u4f1a\u91cd\u65b0\u7f16\u8bd1\u6b64\u65b9\u6cd5\u3002\u91cd\u7f16\u8bd1\u540e\uff0c\u7f16\u8bd1\u5668\u53ef\u80fd\u4f1a\u4f7f\u7528\u4e0d\u63d0\u4f9b\u8ddf\u8e2a\u7684\u9884\u5206\u914d\u5f02\u5e38\u6765\u9009\u62e9\u66f4\u5feb\u7684\u7b56\u7565\u3002<\/p>\n<p>\u672c\u5730\u6d4b\u8bd5\u4e86\u4e00\u4e0b\u629b\u51faNullPointerException,\u5728\u5f00\u542f\u4e0e\u5173\u95edfast throw\u7684\u6027\u80fd\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u6267\u884c\u6b21\u6570<\/th>\n<th>\u5f00\u542fFast Throw<\/th>\n<th>\u5173\u95edFast Throw<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>10w<\/td>\n<td>996ms<\/td>\n<td>3525ms<\/td>\n<\/tr>\n<tr>\n<td>100w<\/td>\n<td>5983ms<\/td>\n<td>28345ms<\/td>\n<\/tr>\n<tr>\n<td>500w<\/td>\n<td>35678ms<\/td>\n<td>\u2014\u2014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u8a00\u800c\u7b80\u4e4b\uff0c<strong>\u4e0d\u80fd\u56e0\u6b64\u51fa\u73b0\u4e86\u6d88\u5931\u7684\u5f02\u5e38\u5806\u6808\u5c31\u5c1d\u8bd5\u5173\u95edfast throw\u4f18\u5316\u529f\u80fd\u3002<\/strong><\/p>\n<h2>\u4e09\u3001\u95ee\u9898\u539f\u56e0\u5b9a\u4f4d<\/h2>\n<p>\u5bf9\u4e8e\u7ebf\u4e0a\u73af\u5883\u4e2d\u89e6\u53d1\u4e86Fast Throw\u673a\u5236\uff0c\u5219\u53ef\u4ee5\u901a\u8fc7\u5411\u524d\u8ffd\u6eaf\u76f8\u540c\u7684\u65e5\u5fd7\u6765\u5b9a\u4f4d\u95ee\u9898\u3002<\/p>\n<p>\u5982\u5728\u5f00\u95e8\u7ea2\u4e2d\uff0c\u6709\u4e2a\u63a5\u53e3\u7684\u53ef\u7528\u7387\u8c03\u523098.3%\uff08\u4e0d\u662f100%\uff09\uff0c\u5982\u4e0b\u56fe\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043948254\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u7136\u540e\u641c\u7d22\u65e5\u5fd7\u53d1\u73b0\u5927\u91cf\u7684Caused by: java.lang.NullPointerException\uff0c\u6ca1\u6709\u8be6\u7ec6\u7684\u5f02\u5e38\u5806\u6808\uff0c\u5f88\u663e\u7136\u662f\u7531\u4e8efast throw\u5bfc\u81f4\u7684\uff0c\u7136\u540e\u4e0d\u65ad\u5411\u524d\u8ffd\u6eaf\u76f8\u540c\u7684\u65e5\u5fd7\u6765\u5b9a\u4f4d\u95ee\u9898\u5982\u4e0b\u56fe\u3002<\/p>\n<pre><code>19:05:32.592 [JSF-BZ-22001-245-T-522] ERROR com.jd.m.soa.shop.service.jsf.shop.impl.ShopSoaOutSideJsfServiceImpl - ShopSoaOutSideJsfServiceImpl.getKACard error\ncom.jd.sirector.SirectorException: java.lang.NullPointerException\n    at com.jd.sirector.ScriptRuntime.waitIfNecessary(ScriptRuntime.java:129) ~[sirector-core-0.2.2-beta.jar:?]\n    at com.jd.sirector.ScriptRuntime.run(ScriptRuntime.java:66) ~[sirector-core-0.2.2-beta.jar:?]\n    at com.jd.sirector.Sirector.publish(Sirector.java:153) ~[sirector-core-0.2.2-beta.jar:?]\n    ****************\n    at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_60]\n    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[?:1.8.0_60]\n    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[?:1.8.0_60]\n    at java.lang.Thread.run(Thread.java:745) ~[?:1.8.0_60]\nCaused by: java.lang.NullPointerException\n    at com.jd.******************wProxy.java:321) ~[shop-soa-service-1.1.jar:?]\n    **************\n    ... 5 more\n19:05:44.063 [JSF-BZ-22001-245-T-503] ERROR com.jd.m.soa.shop.service.jsf.shop.impl.ShopSoaOutSideJsfServiceImpl - ShopSoaOutSideJsfServiceImpl.getKACard error\ncom.jd.sirector.SirectorException: java.lang.NullPointerException\n    at com.jd.sirector.ScriptRuntime.waitIfNecessary(ScriptRuntime.java:129) ~[sirector-core-0.2.2-beta.jar:?]\n    at com.jd.sirector.ScriptRuntime.run(ScriptRuntime.java:66) ~[sirector-core-0.2.2-beta.jar:?]\n    at com.jd.sirector.Sirector.publish(Sirector.java:153) ~[sirector-core-0.2.2-beta.jar:?]\n    ****************\n    at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_60]\n    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[?:1.8.0_60]\n    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[?:1.8.0_60]\n    at java.lang.Thread.run(Thread.java:745) ~[?:1.8.0_60]\nCaused by: java.lang.NullPointerException\n19:05:47.831 [pool-84-thread-10] ERROR com.jd.m.soa.shop.service.base.shop.impl.ShopBaseServiceImpl - \u4e0a\u6e38\u8fd4\u56de\u7684\u5e97\u94fa\u661f\u7ea7\u503c\u975e\u6cd5\u3002value=0.0<\/code><\/pre>\n<p>\u51fa\u73b0\u95ee\u9898\u7684\u539f\u56e0\u627e\u5230\u4e86\uff0c\u63a5\u7740\u5c31\u5206\u6790\u539f\u56e0\u3002\u539f\u56e0\u5f88\u7b80\u5355\uff0c\u7531\u4e8e\u67d0\u4e00\u53f0\u673a\u5668\u6027\u80fd\u6ce2\u52a8\u5bfc\u81f4\u63a5\u53e3\u8d85\u65f6\u5c06\u515c\u5e95\u5bf9\u8c61\u7f13\u5b58\uff0c\u540e\u7eed\u903b\u8f91\u5728\u5904\u7406\u7684\u8fc7\u79cd\u4e2d\u5bf9\u8c61\u4e2d\u7684Boolean\u5c5e\u6027\u503c\u5728\u8f6cboolean\u65f6\u51fa\u73b0NPE\uff0c\u95ee\u9898\u6839\u6e90\u8fd8\u662f\u4ee3\u7801\u517c\u5bb9\u6027\u4e0d\u8db3\u591f\u597d\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043948255\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u8fd9\u8fd9\u53f0\u673a\u5668\u8fdb\u884c\u7cfb\u7edf\u89c6\u56fe\u5c42\u5206\u6790\uff0c\u53d1\u73b0TCP\u91cd\u4f20\u6570\u8f83\u9ad8\uff0c\u5982\u4e0b\u5de6\u56fe\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043948256\" alt=\"\" title=\"\" loading=\"lazy\"><\/th>\n<th><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043948257\" alt=\"\" title=\"\" loading=\"lazy\"><\/th>\n<\/tr>\n<\/thead>\n<\/tbody>\n<\/table>\n<h2>\u56db\u3001\u95ee\u9898\u539f\u56e0\u5206\u6790<\/h2>\n<p>TCP\u91cd\u4f20\u4e3b\u8981\u662f\u4e3a\u4e86\u4fdd\u8bc1\u6570\u636e\u4f20\u8f93\u7684\u53ef\u9760\u6027\uff0cTCP\u662f\u4e00\u79cd\u4fdd\u8bc1\u53ef\u9760\u4f20\u8f93\u7684\u673a\u5236\uff0c\u5982\u91cd\u4f20\u4e0e\u786e\u8ba4\u673a\u5236\u3001\u6570\u636e\u6821\u9a8c\u3001\u6570\u636e\u5206\u7247\u3001\u6d41\u91cf\u63a7\u5236\u3001\u62e5\u585e\u63a7\u5236\u7b49\u3002TCP\u91cd\u4f20\u7684\u7c7b\u578b\u6709\u8d85\u65f6\u91cd\u4f20\u548c\u5feb\u901f\u91cd\u4f20\u3002\u8d85\u65f6\u91cd\u4f20\u662f\u5728\u8bf7\u6c42\u5305\u53d1\u9001\u51fa\u53bb\u65f6\u5f00\u542f\u8ba1\u65f6\u5668\uff0c\u5f53\u5230\u8fbe\u65f6\u95f4\u4e4b\u540e\uff0c\u6ca1\u6709\u6536\u5230ACK\uff0c\u5219\u8fdb\u884c\u91cd\u4f20\u76f4\u5230\u8fbe\u5230\u4e0a\u9650\u6b21\u6570\u6216\u8005\u6536\u5230ACK\u3002\u5feb\u901f\u91cd\u4f20\u5219\u4f9d\u8d56\u4e8e\u6570\u636e\u5305\u7684\u671f\u671b\u5e8f\u5217\u53f7\uff0c\u5e76\u8fdb\u884c\u4e00\u81f4\u6027\u68c0\u67e5\u3002<\/p>\n<ul>\n<li>\u591a\u53f0\u673a\u5668\u6216\u8005\u540c\u4e00\u673a\u623f\u540c\u65f6TCP\u91cd\u4f20<\/li>\n<\/ul>\n<p>\u5f88\u5927\u539f\u56e0\u662f\u7f51\u7edc\u6296\u52a8<\/p>\n<ul>\n<li>\u5355\u673a\u6216\u8005\u67d0\u4e2a\u5e94\u7528\u51fa\u73b0TCP\u91cd\u4f20<\/li>\n<\/ul>\n<p>\u4e00\u822c\u662f\u7531\u4e8e\u94fe\u8def\u7684\u670d\u52a1\u5668\u6216\u7aef\u53e3\u65e0\u6cd5\u8bbf\u95ee\uff0c\u5bf9\u4e8e\u865a\u62df\u673a\u6216\u8005docker\uff0c\u8fd8\u9700\u8981\u8003\u8651\u5bbf\u4e3b\u673a\u7684\u95ee\u9898\u3002<\/p>\n<p>\u901a\u8fc7\u7cfb\u7edf\u7ea7\u5206\u6790\uff0c\u6700\u540e\u786e\u5b9a\u662f\u7531\u4e8e\u5bbf\u4e3b\u673a\u8fde\u63a5\u6027\u95ee\u9898\u5bfc\u81f4docker\u5b9e\u4f8bTCP\u91cd\u4f20\u589e\u9ad8\uff0c\u5f53\u7136\u6700\u91cd\u8981\u7684\u662f\u8865\u5145\u76f8\u5173\u7684\u6307\u6807\u76d1\u63a7\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043948258\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u603b\u4e4b\uff0c\u65e0\u8bba\u662f\u5728\u5927\u4fc3\u671f\u95f4\u8fd8\u5728\u5e73\u65f6\uff0c\u9047\u5230\u95ee\u9898\u9996\u5148\u89e3\u51b3\u597d\u95ee\u9898\uff0c\u66f4\u4e3a\u91cd\u8981\u7684\u662f\u8ffd\u672c\u6eaf\u539f\uff0c\u627e\u51fa\u95ee\u9898\u7684\u6839\u56e0\uff0c\u4ee5\u4fbf\u63a8\u52a8\u56e2\u961f\u4f18\u5316\u548c\u63d0\u5347\u3002<\/p>\n<blockquote>\n<p>\u4f5c\u8005\uff1a\u4eac\u4e1c\u96f6\u552e \u5f20\u5e05<\/p>\n<p>\u6765\u6e90\uff1a\u4eac\u4e1c\u4e91\u5f00\u53d1\u8005\u793e\u533a<\/p>\n<\/blockquote>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000043948252\">https:\/\/segmentfault.com\/a\/1190000043948252<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u6d88\u5931\u7684\u5f02\u5e38\u5806\u6808 \u5728618\u4fdd\u969c\u5927\u4fc3\u7a33\u5b9a\u6027\u8fc7\u7a0b\u4e2d\uff0c\u6d88\u5931\u7684\u5f02\u5e38\u5806\u6808\u53ef\u80fd\u4f1a\u7ed9\u6211\u4eec\u5e26\u6765\u4e25\u91cd\u7684\u9ebb\u70e6\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u5806\u6808\u4fe1\u606f\u662f 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