{"id":10759,"date":"2023-11-28T21:43:05","date_gmt":"2023-11-28T13:43:05","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=10759"},"modified":"2023-12-07T14:53:36","modified_gmt":"2023-12-07T06:53:36","slug":"jvm-zhong-zen-me-kan-si-suo-de-xian-cheng","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/jvm-zhong-zen-me-kan-si-suo-de-xian-cheng\/","title":{"rendered":"JVM\u4e2d\u600e\u4e48\u770b\u6b7b\u9501\u7684\u7ebf\u7a0b\uff1f"},"content":{"rendered":"<p>\u5728Java\u865a\u62df\u673a\uff08JVM\uff09\u4e2d\uff0c\u8981\u68c0\u6d4b\u6b7b\u9501\u7684\u7ebf\u7a0b\u901a\u5e38\u9700\u8981\u501f\u52a9\u5de5\u5177\u548c\u6280\u672f\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u65b9\u6cd5\uff1a<\/p>\n<ol>\n<li>\n<strong>jstack\uff08\u6216Ctrl + Break\uff09\uff1a<\/strong> jstack\u662fJVM\u81ea\u5e26\u7684\u4e00\u4e2a\u547d\u4ee4\u884c\u5de5\u5177\uff0c\u7528\u4e8e\u751f\u6210Java\u7ebf\u7a0b\u5806\u6808\u8ddf\u8e2a\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code class=\"language-bash\">jstack &lt;pid&gt;\n<\/code><\/pre>\n<p>\u6216\u8005\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>kill -3 &lt;pid&gt;<\/code> \u53d1\u9001\u4fe1\u53f7\u7ed9\u8fdb\u7a0b\u6765\u751f\u6210\u7ebf\u7a0b\u5806\u6808\u3002<\/p>\n<p>\u5728\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f\u4e2d\uff0c\u4f60\u53ef\u4ee5\u67e5\u627e\u7ebf\u7a0b\u7684\u72b6\u6001\u548c\u9501\u4fe1\u606f\uff0c\u5c24\u5176\u662f\u67e5\u627e\u4e0e\u9501\u76f8\u5173\u7684\u7ebf\u7a0b\u662f\u5426\u6709\u76f8\u4e92\u7b49\u5f85\u7684\u60c5\u51b5\uff0c\u4ece\u800c\u5224\u65ad\u662f\u5426\u5b58\u5728\u6b7b\u9501\u3002\n<\/li>\n<li>\n<strong>VisualVM\uff1a<\/strong> VisualVM\u662f\u4e00\u4e2a\u56fe\u5f62\u5316\u7684\u76d1\u63a7\u3001\u7ba1\u7406\u548c\u5206\u6790\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u4e8e\u68c0\u6d4b\u6b7b\u9501\u3002\u5b83\u53ef\u4ee5\u901a\u8fc7VisualVM\u4e2d\u7684&quot;Threads&quot;\u9009\u9879\u5361\u67e5\u770b\u5404\u4e2a\u7ebf\u7a0b\u7684\u5806\u6808\u4fe1\u606f\uff0c\u4ee5\u53ca\u9501\u7684\u60c5\u51b5\u3002\u5982\u679c\u5b58\u5728\u5faa\u73af\u4f9d\u8d56\u7684\u9501\uff0c\u53ef\u80fd\u5c31\u662f\u6b7b\u9501\u7684\u8ff9\u8c61\u3002\n<\/li>\n<li>\n<strong>ThreadMXBean\uff1a<\/strong> Java\u63d0\u4f9b\u4e86 <code>ThreadMXBean<\/code> \u63a5\u53e3\uff0c\u53ef\u4ee5\u901a\u8fc7\u7f16\u7a0b\u7684\u65b9\u5f0f\u83b7\u53d6\u7ebf\u7a0b\u4fe1\u606f\u3002\u901a\u8fc7 <code>ThreadMXBean<\/code> \u53ef\u4ee5\u68c0\u67e5\u7ebf\u7a0b\u7684\u72b6\u6001\u3001\u9501\u4fe1\u606f\u7b49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684Java\u7a0b\u5e8f\u7247\u6bb5\uff1a<\/p>\n<pre><code class=\"language-java\">ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();\nlong[] threadIds = threadMXBean.findDeadlockedThreads();\nif (threadIds != null) {\n    ThreadInfo[] threadInfos = threadMXBean.getThreadInfo(threadIds);\n    for (ThreadInfo threadInfo : threadInfos) {\n        System.out.println(&quot;Deadlocked Thread: &quot; + threadInfo.getThreadName());\n    }\n}\n<\/code><\/pre>\n<\/li>\n<\/ol>\n<p>\u8fd9\u4e9b\u65b9\u6cd5\u90fd\u53ef\u4ee5\u5e2e\u52a9\u4f60\u68c0\u6d4b\u6b7b\u9501\u7684\u7ebf\u7a0b\u3002\u6b7b\u9501\u901a\u5e38\u53d1\u751f\u5728\u591a\u4e2a\u7ebf\u7a0b\u4e4b\u95f4\u76f8\u4e92\u7b49\u5f85\u5bf9\u65b9\u91ca\u653e\u9501\u7684\u60c5\u51b5\u4e0b\uff0c\u56e0\u6b64\u5728\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f\u4e2d\uff0c\u4f60\u9700\u8981\u6ce8\u610f\u67e5\u627e\u5faa\u73af\u4f9d\u8d56\u7684\u9501\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Java\u865a\u62df\u673a\uff08JVM\uff09\u4e2d\uff0c\u8981\u68c0\u6d4b\u6b7b\u9501\u7684\u7ebf\u7a0b\u901a\u5e38\u9700\u8981\u501f\u52a9\u5de5\u5177\u548c\u6280\u672f\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u65b9\u6cd5\uff1a jstack\uff08\u6216 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[119],"tags":[],"class_list":["post-10759","post","type-post","status-publish","format-standard","hentry","category-jvm"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10759","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=10759"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10759\/revisions"}],"predecessor-version":[{"id":16891,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10759\/revisions\/16891"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=10759"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=10759"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=10759"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}