{"id":10402,"date":"2023-11-28T21:33:57","date_gmt":"2023-11-28T13:33:57","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=10402"},"modified":"2023-12-07T11:22:14","modified_gmt":"2023-12-07T03:22:14","slug":"jvm-zhong-ru-he-zhao-dao-si-suo-de-xian-cheng","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/jvm-zhong-ru-he-zhao-dao-si-suo-de-xian-cheng\/","title":{"rendered":"JVM\u4e2d\u5982\u4f55\u627e\u5230\u6b7b\u9501\u7684\u7ebf\u7a0b\uff1f"},"content":{"rendered":"<p>\u5728Java\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6b7b\u9501\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u591a\u7ebf\u7a0b\u95ee\u9898\uff0c\u5b83\u53d1\u751f\u5728\u4e24\u4e2a\u6216\u591a\u4e2a\u7ebf\u7a0b\u4e92\u76f8\u7b49\u5f85\u5bf9\u65b9\u6301\u6709\u7684\u8d44\u6e90\u65f6\u3002JVM\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5de5\u5177\u548c\u6280\u672f\u6765\u5e2e\u52a9\u8bc6\u522b\u548c\u5b9a\u4f4d\u6b7b\u9501\u7684\u7ebf\u7a0b\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u65b9\u6cd5\uff1a<\/p>\n<ol>\n<li>\n<strong>\u4f7f\u7528<code>jstack<\/code>\u547d\u4ee4\uff1a<\/strong><\/p>\n<ul>\n<li><code>jstack<\/code>\u547d\u4ee4\u662fJVM\u81ea\u5e26\u7684\u4e00\u4e2a\u5de5\u5177\uff0c\u53ef\u4ee5\u751f\u6210Java\u5e94\u7528\u7a0b\u5e8f\u5f53\u524d\u65f6\u523b\u7684\u7ebf\u7a0b\u5feb\u7167\u3002\u901a\u8fc7\u67e5\u770b\u7ebf\u7a0b\u5feb\u7167\uff0c\u53ef\u4ee5\u8bc6\u522b\u6b7b\u9501\u60c5\u51b5\u3002<\/li>\n<li>\u5728\u547d\u4ee4\u884c\u4e2d\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a\n<pre><code class=\"language-bash\">jstack &lt;pid&gt;\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<p>\u5176\u4e2d <code>&lt;pid&gt;<\/code> \u662fJava\u5e94\u7528\u7a0b\u5e8f\u7684\u8fdb\u7a0bID\u3002<\/p>\n<ul>\n<li>\u67e5\u770b<code>jstack<\/code>\u7684\u8f93\u51fa\uff0c\u5bfb\u627e\u7ebf\u7a0b\u4e4b\u95f4\u7684\u76f8\u4e92\u7b49\u5f85\u60c5\u51b5\uff0c\u7279\u522b\u662f\u7ebf\u7a0b\u7684\u72b6\u6001\u4e3a<code>BLOCKED<\/code>\u7684\u60c5\u51b5\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u4f7f\u7528\u53ef\u89c6\u5316\u5de5\u5177\uff1a<\/strong><\/p>\n<ul>\n<li>\u4f7f\u7528\u53ef\u89c6\u5316\u5de5\u5177\uff0c\u5982VisualVM\u7b49\uff0c\u53ef\u4ee5\u66f4\u76f4\u89c2\u5730\u67e5\u770b\u7ebf\u7a0b\u72b6\u6001\u548c\u7ebf\u7a0b\u4e4b\u95f4\u7684\u4f9d\u8d56\u5173\u7cfb\u3002<\/li>\n<li>\u5728VisualVM\u7684\u7ebf\u7a0b\u89c6\u56fe\u4e2d\uff0c\u67e5\u770b\u662f\u5426\u5b58\u5728\u5faa\u73af\u4f9d\u8d56\u7684\u7ebf\u7a0b\u5173\u7cfb\uff0c\u8fd9\u53ef\u80fd\u662f\u6b7b\u9501\u7684\u8ff9\u8c61\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u4f7f\u7528<code>jconsole<\/code>\uff1a<\/strong><\/p>\n<ul>\n<li><code>jconsole<\/code>\u662fJava Monitoring and Management Console\uff0c\u4e5f\u662fJVM\u63d0\u4f9b\u7684\u4e00\u4e2a\u76d1\u63a7\u5de5\u5177\u3002<\/li>\n<li>\u542f\u52a8<code>jconsole<\/code>\uff0c\u8fde\u63a5\u5230\u8fd0\u884c\u4e2d\u7684Java\u8fdb\u7a0b\uff0c\u7136\u540e\u5728\u7ebf\u7a0b\u6807\u7b7e\u4e0b\u67e5\u770b\u7ebf\u7a0b\u4fe1\u606f\uff0c\u5bfb\u627e\u72b6\u6001\u4e3a<code>BLOCKED<\/code>\u7684\u7ebf\u7a0b\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u4f7f\u7528<code>ThreadMXBean<\/code> API\uff1a<\/strong><\/p>\n<ul>\n<li>\u901a\u8fc7Java\u4ee3\u7801\u4f7f\u7528<code>ThreadMXBean<\/code> API\uff0c\u53ef\u4ee5\u52a8\u6001\u5730\u83b7\u53d6\u7ebf\u7a0b\u7684\u4fe1\u606f\uff0c\u5305\u62ec\u7ebf\u7a0b\u7684\u72b6\u6001\u3001\u5806\u6808\u4fe1\u606f\u7b49\u3002<\/li>\n<li>\u901a\u8fc7\u7a0b\u5e8f\u76d1\u63a7\u7ebf\u7a0b\u72b6\u6001\uff0c\u68c0\u6d4b\u662f\u5426\u5b58\u5728\u6b7b\u9501\u7684\u8ff9\u8c61\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4f7f\u7528<code>ThreadMXBean<\/code>\u7684Java\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<pre><code class=\"language-java\">import java.lang.management.ManagementFactory;\nimport java.lang.management.ThreadMXBean;\n\npublic class DeadlockDetection {\n    public static void main(String[] args) {\n        ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();\n        long[] threadIds = threadMXBean.findDeadlockedThreads();\n        \n        if (threadIds != null) {\n            System.out.println(&quot;Deadlocked Threads:&quot;);\n            for (long threadId : threadIds) {\n                System.out.println(&quot;Thread ID: &quot; + threadId);\n            }\n        } else {\n            System.out.println(&quot;No deadlocked threads found.&quot;);\n        }\n    }\n}\n<\/code><\/pre>\n<p>\u8fd9\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u534f\u52a9\u5f00\u53d1\u4eba\u5458\u5728\u53d1\u751f\u6b7b\u9501\u65f6\u53ca\u65f6\u8bc6\u522b\u5e76\u8fdb\u884c\u8c03\u67e5\u3002\u8981\u6ce8\u610f\uff0c\u6b7b\u9501\u7684\u8bca\u65ad\u53ef\u80fd\u5e76\u4e0d\u603b\u662f\u76f4\u89c2\uff0c\u56e0\u6b64\u53ef\u80fd\u9700\u8981\u7efc\u5408\u4f7f\u7528\u591a\u79cd\u5de5\u5177\u548c\u65b9\u6cd5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Java\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6b7b\u9501\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u591a\u7ebf\u7a0b\u95ee\u9898\uff0c\u5b83\u53d1\u751f\u5728\u4e24\u4e2a\u6216\u591a\u4e2a\u7ebf\u7a0b\u4e92\u76f8\u7b49\u5f85\u5bf9\u65b9\u6301\u6709\u7684\u8d44\u6e90\u65f6\u3002JVM\u63d0\u4f9b\u4e86 [&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-10402","post","type-post","status-publish","format-standard","hentry","category-jvm"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10402","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=10402"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10402\/revisions"}],"predecessor-version":[{"id":16833,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10402\/revisions\/16833"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=10402"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=10402"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=10402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}