{"id":653,"date":"2022-08-20T13:42:53","date_gmt":"2022-11-28T15:14:57","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%82%b9%e3%83%ac%e3%83%83%e3%83%89%e3%81%ae%e3%83%80%e3%83%b3%e3%83%97%e3%82%92%e5%8f%96%e5%be%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%ab%e3%81%af%e3%80%81visualvm%e3%80%81jstack%e3%80%81ki\/"},"modified":"2025-08-01T01:24:08","modified_gmt":"2025-07-31T16:24:08","slug":"java%e3%82%b9%e3%83%ac%e3%83%83%e3%83%89%e3%81%ae%e3%83%80%e3%83%b3%e3%83%97%e3%82%92%e5%8f%96%e5%be%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%ab%e3%81%af%e3%80%81visualvm%e3%80%81jstack%e3%80%81ki","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%82%b9%e3%83%ac%e3%83%83%e3%83%89%e3%81%ae%e3%83%80%e3%83%b3%e3%83%97%e3%82%92%e5%8f%96%e5%be%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%ab%e3%81%af%e3%80%81visualvm%e3%80%81jstack%e3%80%81ki\/","title":{"rendered":"Java\u30b9\u30ec\u30c3\u30c9\u306e\u30c0\u30f3\u30d7\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u306b\u306f\u3001VisualVM\u3001jstack\u3001kill -3\u3001jcmd\u304c\u3042\u308a\u307e\u3059\u3002"},"content":{"rendered":"

Java\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306f\u3001JVM\u5185\u3067\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u3059\u3079\u3066\u306e\u30b9\u30ec\u30c3\u30c9\u306e\u4e00\u89a7\u3067\u3059\u3002<\/p>\n

Java \u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7<\/h2>\n

Java\u30b9\u30ec\u30c3\u30c9\u306e\u30c0\u30f3\u30d7\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3084\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306e\u72b6\u6cc1\u3092\u5206\u6790\u3059\u308b\u306e\u306b\u975e\u5e38\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u751f\u6210\u3059\u308b\u305f\u3081\u306e\u8907\u6570\u306e\u65b9\u6cd5\u3092\u5b66\u3073\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u624b\u9806\u306f*nix\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306b\u5bfe\u3057\u3066\u6709\u52b9\u3067\u3059\u304c\u3001Windows\u3067\u306f\u5c11\u3057\u7570\u306a\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n

    \n
  1. \n
      VisualVM \u30d7\u30ed\u30d5\u30a1\u30a4\u30e9\u30fc: \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u9045\u5ef6\u3092\u5206\u6790\u3059\u308b\u5834\u5408\u3001\u30d7\u30ed\u30d5\u30a1\u30a4\u30e9\u30fc\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002VisualVM \u30d7\u30ed\u30d5\u30a1\u30a4\u30e9\u30fc\u3092\u4f7f\u7528\u3059\u308c\u3070\u3001\u3069\u3093\u306a\u30d7\u30ed\u30bb\u30b9\u3067\u3082\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u7c21\u5358\u306b\u751f\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5b9f\u884c\u4e2d\u306e\u30d7\u30ed\u30bb\u30b9\u4e0a\u3067\u53f3\u30af\u30ea\u30c3\u30af\u3057\u3001\u300c\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u300d\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3060\u3051\u3067\u751f\u6210\u3067\u304d\u307e\u3059\u3002<\/ol>\n<\/li>\n<\/ol>\n

      jstack: Java \u306b\u306f jstack \u30c4\u30fc\u30eb\u304c\u4ed8\u5c5e\u3057\u3066\u304a\u308a\u3001Java \u30d7\u30ed\u30bb\u30b9\u306e\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u751f\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f 2 \u30b9\u30c6\u30c3\u30d7\u306e\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002<\/p>\n

      ps -eaf | grep java \u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001Java \u30d7\u30ed\u30bb\u30b9\u306e PID \u3092\u53d6\u5f97\u3057\u307e\u3059\u3002
      \njstack PID \u3068\u3057\u3066 jstack \u30c4\u30fc\u30eb\u3092\u5b9f\u884c\u3057\u3001\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u51fa\u529b\u3057\u307e\u3059\u3002\u30b3\u30de\u30f3\u30c9\u300cjstack PID >> mydumps.tdump\u300d\u3092\u4f7f\u7528\u3057\u3066\u3001\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306e\u51fa\u529b\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n

      \u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u751f\u6210\u3059\u308b\u305f\u3081\u306b kill -3 PID \u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u4ed6\u306e\u65b9\u6cd5\u3068\u82e5\u5e72\u7570\u306a\u308a\u307e\u3059\u3002kill \u30b3\u30de\u30f3\u30c9\u304c\u5b9f\u884c\u3055\u308c\u308b\u3068\u3001\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30b7\u30b9\u30c6\u30e0\u51fa\u529b\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u30b7\u30b9\u30c6\u30e0\u51fa\u529b\u304c\u30b3\u30f3\u30bd\u30fc\u30eb\u3067\u3042\u308b\u5834\u5408\u306f\u3001\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u304c\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\u3002\u3082\u3057 Java \u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u30b7\u30b9\u30c6\u30e0\u51fa\u529b\u3068\u3057\u3066 catalina.out \u3092\u6301\u3064 Tomcat \u30b5\u30fc\u30d0\u30fc\u3067\u3042\u308b\u5834\u5408\u306f\u3001\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u304c\u30d5\u30a1\u30a4\u30eb\u306b\u751f\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n

      Java 8 \u3067\u306f jcmd \u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002Java 8 \u4ee5\u4e0a\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001jstack \u306e\u4ee3\u308f\u308a\u306b\u3053\u308c\u3092\u4f7f\u7528\u3059\u308b\u3079\u304d\u3067\u3059\u3002jcmd \u3092\u4f7f\u7528\u3057\u3066\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u751f\u6210\u3059\u308b\u30b3\u30de\u30f3\u30c9\u306f jcmd PID Thread.print \u3067\u3059\u3002<\/p>\n

      \u4ee5\u4e0b\u306fJava\u3067\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u751f\u6210\u3059\u308b\u305f\u3081\u306e4\u3064\u306e\u7570\u306a\u308b\u65b9\u6cd5\u3067\u3059\u3002\u901a\u5e38\u306fjstack\u3084jcmd\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u751f\u6210\u3057\u3001\u89e3\u6790\u3059\u308b\u3053\u3068\u3092\u597d\u307f\u307e\u3059\u3002\u3069\u306e\u65b9\u6cd5\u3092\u9078\u3093\u3067\u3082\u3001\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306f\u5e38\u306b\u540c\u3058\u3067\u3059\u3002<\/p>\n

      Java \u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306e\u4f8b<\/h3>\n

      \u524d\u306e\u6295\u7a3f\u3067\u3001Java\u306e\u30bf\u30a4\u30de\u30fc\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3057\u305f\u304c\u3001\u540c\u3058\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u305f\u3081\u306b\u751f\u6210\u3055\u308c\u305f\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

      2012-12-26 22:28:39\r\nFull thread dump Java HotSpot(TM) 64-Bit Server VM (23.5-b02 mixed mode):\r\n\r\n\"Attach Listener\" daemon prio=5 tid=0x00007fb7d8000000 nid=0x4207 waiting on condition [0x0000000000000000]\r\n   java.lang.Thread.State: RUNNABLE\r\n\r\n\"Timer-0\" daemon prio=5 tid=0x00007fb7d4867000 nid=0x5503 waiting on condition [0x00000001604d9000]\r\n   java.lang.Thread.State: TIMED_WAITING (sleeping)\r\n\tat java.lang.Thread.sleep(Native Method)\r\n\tat com.scdev.threads.MyTimerTask.completeTask(MyTimerTask.java:19)\r\n\tat com.scdev.threads.MyTimerTask.run(MyTimerTask.java:12)\r\n\tat java.util.TimerThread.mainLoop(Timer.java:555)\r\n\tat java.util.TimerThread.run(Timer.java:505)\r\n\r\n\"Service Thread\" daemon prio=5 tid=0x00007fb7d482c000 nid=0x5303 runnable [0x0000000000000000]\r\n   java.lang.Thread.State: RUNNABLE\r\n\r\n\"C2 CompilerThread1\" daemon prio=5 tid=0x00007fb7d482b800 nid=0x5203 waiting on condition [0x0000000000000000]\r\n   java.lang.Thread.State: RUNNABLE\r\n\r\n\"C2 CompilerThread0\" daemon prio=5 tid=0x00007fb7d4829800 nid=0x5103 waiting on condition [0x0000000000000000]\r\n   java.lang.Thread.State: RUNNABLE\r\n\r\n\"Signal Dispatcher\" daemon prio=5 tid=0x00007fb7d4828800 nid=0x5003 runnable [0x0000000000000000]\r\n   java.lang.Thread.State: RUNNABLE\r\n\r\n\"Finalizer\" daemon prio=5 tid=0x00007fb7d4812000 nid=0x3f03 in Object.wait() [0x000000015fd26000]\r\n   java.lang.Thread.State: WAITING (on object monitor)\r\n\tat java.lang.Object.wait(Native Method)\r\n\t- waiting on <0x0000000140a25798> (a java.lang.ref.ReferenceQueue$Lock)\r\n\tat java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135)\r\n\t- locked <0x0000000140a25798> (a java.lang.ref.ReferenceQueue$Lock)\r\n\tat java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151)\r\n\tat java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:177)\r\n\r\n\"Reference Handler\" daemon prio=5 tid=0x00007fb7d4811800 nid=0x3e03 in Object.wait() [0x000000015fc23000]\r\n   java.lang.Thread.State: WAITING (on object monitor)\r\n\tat java.lang.Object.wait(Native Method)\r\n\t- waiting on <0x0000000140a25320> (a java.lang.ref.Reference$Lock)\r\n\tat java.lang.Object.wait(Object.java:503)\r\n\tat java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133)\r\n\t- locked <0x0000000140a25320> (a java.lang.ref.Reference$Lock)\r\n\r\n\"main\" prio=5 tid=0x00007fb7d5000800 nid=0x1703 waiting on condition [0x0000000106116000]\r\n   java.lang.Thread.State: TIMED_WAITING (sleeping)\r\n\tat java.lang.Thread.sleep(Native Method)\r\n\tat com.scdev.threads.MyTimerTask.main(MyTimerTask.java:33)\r\n\r\n\"VM Thread\" prio=5 tid=0x00007fb7d480f000 nid=0x3d03 runnable \r\n\r\n\"GC task thread#0 (ParallelGC)\" prio=5 tid=0x00007fb7d500d800 nid=0x3503 runnable \r\n\r\n\"GC task thread#1 (ParallelGC)\" prio=5 tid=0x00007fb7d500e000 nid=0x3603 runnable \r\n\r\n\"GC task thread#2 (ParallelGC)\" prio=5 tid=0x00007fb7d5800000 nid=0x3703 runnable \r\n\r\n\"GC task thread#3 (ParallelGC)\" prio=5 tid=0x00007fb7d5801000 nid=0x3803 runnable \r\n\r\n\"GC task thread#4 (ParallelGC)\" prio=5 tid=0x00007fb7d5801800 nid=0x3903 runnable \r\n\r\n\"GC task thread#5 (ParallelGC)\" prio=5 tid=0x00007fb7d5802000 nid=0x3a03 runnable \r\n\r\n\"GC task thread#6 (ParallelGC)\" prio=5 tid=0x00007fb7d5802800 nid=0x3b03 runnable \r\n\r\n\"GC task thread#7 (ParallelGC)\" prio=5 tid=0x00007fb7d5803800 nid=0x3c03 runnable \r\n\r\n\"VM Periodic Task Thread\" prio=5 tid=0x00007fb7d481e800 nid=0x5403 waiting on condition \r\n\r\nJNI global references: 116\r\n<\/code><\/pre>\n
      \u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306f\u3001\u3059\u3079\u3066\u306e\u30b9\u30ec\u30c3\u30c9\u306e\u30ea\u30b9\u30c8\u3067\u3042\u308a\u3001\u5404\u30a8\u30f3\u30c8\u30ea\u306f\u51fa\u73fe\u9806\u306b\u4ee5\u4e0b\u306e\u60c5\u5831\u3092\u542b\u3093\u3067\u3044\u307e\u3059\u3002<\/p>\n
        \n
      1. \n
          \u30b9\u30ec\u30c3\u30c9\u540d: \u30b9\u30ec\u30c3\u30c9\u306e\u540d\u524d<\/ol>\n<\/li>\n<\/ol>\n
           <\/p>\n
            \n
          1. \n
              \u30b9\u30ec\u30c3\u30c9\u306e\u512a\u5148\u5ea6: \u30b9\u30ec\u30c3\u30c9\u306e\u512a\u5148\u5ea6<\/ol>\n<\/li>\n<\/ol>\n
               <\/p>\n
                \n
              1. \n
                  \u30b9\u30ec\u30c3\u30c9ID: \u30b9\u30ec\u30c3\u30c9\u306e\u56fa\u6709ID\u3092\u8868\u3057\u307e\u3059<\/ol>\n<\/li>\n<\/ol>\n
                   <\/p>\n
                    \n
                  1. \n
                      \u30b9\u30ec\u30c3\u30c9\u306e\u72b6\u614b: \u73fe\u5728\u306e\u30b9\u30ec\u30c3\u30c9\u306e\u72b6\u614b\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001RUNNABLE\u3001WAITING\u3001BLOCKED\u306a\u3069\u3067\u3059\u3002\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3092\u8abf\u3079\u308b\u969b\u306b\u306f\u3001\u30d6\u30ed\u30c3\u30af\u3055\u308c\u305f\u30b9\u30ec\u30c3\u30c9\u3068\u305d\u308c\u3089\u304c\u30ed\u30c3\u30af\u306e\u53d6\u5f97\u3092\u8a66\u307f\u308b\u30ea\u30bd\u30fc\u30b9\u306b\u6ce8\u76ee\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/ol>\n<\/li>\n<\/ol>\n
                       <\/p>\n
                        \u30b9\u30ec\u30c3\u30c9\u306e\u547c\u3073\u51fa\u3057\u30b9\u30bf\u30c3\u30af: \u30b9\u30ec\u30c3\u30c9\u306e\u91cd\u8981\u306a\u30b9\u30bf\u30c3\u30af\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u3001\u30b9\u30ec\u30c3\u30c9\u304c\u53d6\u5f97\u3057\u305f\u30ed\u30c3\u30af\u3084\u5f85\u3061\u72b6\u614b\u306b\u3042\u308b\u30ed\u30c3\u30af\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/ol>\n
                        Java\u306e\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306b\u95a2\u3057\u3066\u306f\u4ee5\u4e0a\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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