{"id":10106,"date":"2016-02-05T09:00:51","date_gmt":"2016-02-05T00:00:51","guid":{"rendered":"http:\/\/www.techscore.com\/blog\/?p=10106"},"modified":"2018-11-14T16:33:46","modified_gmt":"2018-11-14T07:33:46","slug":"%e3%82%b9%e3%83%ac%e3%83%83%e3%83%89%e3%83%80%e3%83%b3%e3%83%97%e3%81%a7%e3%83%9c%e3%83%88%e3%83%ab%e3%83%8d%e3%83%83%e3%82%af%e3%82%92%e8%aa%bf%e6%9f%bb%e3%81%97%e3%82%88%e3%81%86","status":"publish","type":"post","link":"https:\/\/www.techscore.com\/blog\/2016\/02\/05\/%e3%82%b9%e3%83%ac%e3%83%83%e3%83%89%e3%83%80%e3%83%b3%e3%83%97%e3%81%a7%e3%83%9c%e3%83%88%e3%83%ab%e3%83%8d%e3%83%83%e3%82%af%e3%82%92%e8%aa%bf%e6%9f%bb%e3%81%97%e3%82%88%e3%81%86\/","title":{"rendered":"\u300c\u3046\u308f\u3063\u2026\u79c1\u306e\u30a2\u30d7\u30ea\u3001\u9045\u3059\u304e\u2026\uff1f\u300d \u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3067Java\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3092\u8abf\u67fb\u3057\u3088\u3046"},"content":{"rendered":"

\u3053\u3093\u306b\u3061\u306f\u3001\u5bfa\u5ca1\u3067\u3059\u3002
\n\u4eca\u56de\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30c8\u30e9\u30d6\u30eb\u3092\u8abf\u67fb\u3059\u308b\u969b\u306b\u5f79\u7acb\u3064\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306b\u3064\u3044\u3066\u66f8\u3044\u3066\u307f\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3063\u3066\u4f55\uff1f<\/h2>\n

\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3068\u306f\u3001\u3042\u308b\u6642\u70b9\u306e\u5168\u3066\u306e\u30b9\u30ec\u30c3\u30c9\u306e\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u3092\u51fa\u529b\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n

\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u3068\u306f\u73fe\u5728\u306e\u30b9\u30ec\u30c3\u30c9\u306e\u30e1\u30bd\u30c3\u30c9\u306e\u547c\u3073\u51fa\u3057\u968e\u5c64\u3092\u51fa\u529b\u3057\u305f\u3082\u306e\u3067\u3001\u4f8b\u5916\u304c\u767a\u751f\u3057\u305f\u6642\u306a\u3093\u304b\u306b\u3088\u304f\u898b\u304b\u3051\u308b\u30a2\u30ec\u306e\u3053\u3068\u3067\u3059\u3002<\/p>\n

java\u30d7\u30ed\u30bb\u30b9\u5185\u90e8\u3067\u306f\u8907\u6570\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u4e26\u5217\u306b\u51e6\u7406\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002
\nTomcat\u306a\u3069\u306e\u30b5\u30fc\u30d6\u30ec\u30c3\u30c8\u306f\u8907\u6570\u306e\u30b9\u30ec\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\u3057\u307e\u3059\u3057\u3001\u30b7\u30f3\u30b0\u30eb\u30b9\u30ec\u30c3\u30c9\u306e\u30b7\u30f3\u30d7\u30eb\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u3082GC\u306a\u3069\u306e\u51e6\u7406\u306f\u5c02\u7528\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u51e6\u7406\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u53d6\u5f97\u3059\u308b\u3068\u306f\u3001\u30d7\u30ed\u30bb\u30b9\u5185\u306e\u5168\u30b9\u30ec\u30c3\u30c9\u306b\u5bfe\u3057\u3066\u300c\u3061\u3087\u3063\u3068\u304a\u524d\u3089\u3001\u4eca\u4f55\u3084\u3063\u3066\u308b\u306e\uff1f\u300d\u3068\u805e\u3044\u3066\u56de\u308b\u3088\u3046\u3082\u306e\u3067\u3059\u3002<\/p>\n

\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u53d6\u308b\u524d\u306b\u2026\u2026<\/h2>\n

\u3068\u308a\u3042\u3048\u305atop\u30b3\u30de\u30f3\u30c9\u304f\u3089\u3044\u306f\u53e9\u3044\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n

top - 00:53:32 up 38 days, 3:30, 4 users, load average: 3.04, 1.82, 1.61<\/span>
Tasks: 406 total, 3 running, 403 sleeping, 0 stopped, 0 zombie
%Cpu(s): 86.4 us, 7.6 sy, 0.0 ni, 4.3 id, 0.0 wa, 0.0 hi, 1.6 si, 0.0 st<\/span>
KiB Mem : 2064120 total, 352624 free, 1248168 used, 463328 buff\/cache
KiB Swap: 2097148 total, 1442796 free, 654352 used. 583676 avail Mem <\/p>\n

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
19387 sandbox 20 0 3039060 245548 13684 S 152.5 11.9 1:38.57 java<\/span>
40566 teraoka 20 0 63676 40188 964 S 6.9 1.9 303:30.49 tmux
858 root 20 0 4372 476 452 S 3.0 0.0 768:09.91 rngd
31175 root 20 0 0 0 0 R 3.0 0.0 422:30.34 kworker\/0:2
3860 root 20 0 22564 1380 924 S 2.0 0.1 183:22.41 tmux
73 root 20 0 0 0 0 S 1.0 0.0 19:25.96 rcu_sched
74 root 20 0 0 0 0 R 1.0 0.0 20:06.80 rcuos\/0
1840 root 20 0 687276 3560 2000 S 1.0 0.2 268:23.17 forticlientsslv
13828 sandbox 20 0 130160 2028 1272 R 1.0 0.1 0:00.09 top
1 root 20 0 139280 3324 1532 S 0.0 0.2 0:40.86 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.58 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 1:33.16 ksoftirqd\/0
5 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker\/0:0H
7 root rt 0 0 0 0 S 0.0 0.0 1:32.83 migration\/0<\/div>\n

\u7279\u306b\u6c17\u3092\u3064\u3051\u3066\u307f\u305f\u3044\u7b87\u6240\u306b\u80cc\u666f\u8272\u3092\u3064\u3051\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u53f3\u4e0a\u306e\u30ed\u30fc\u30c9\u30a2\u30d9\u30ec\u30fc\u30b8\u304cCPU\u30b3\u30a2\u6570\u3092\u5927\u5e45\u306b\u8d85\u904e\u3057\u3066\u304a\u308a\u3001\u30d7\u30ed\u30bb\u30b9\u306eCPU\u5229\u7528\u7387\u304c\u9ad8\u3044\u72b6\u614b\u304c\u7d9a\u3044\u3066\u3044\u308b\u5834\u5408\u3001\u305d\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u4f55\u3089\u304b\u306e\u8a08\u7b97\u51e6\u7406\u3067CPU\u3092\u4f7f\u3044\u304d\u3063\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u3044\u3067\u3059\u3002
\nCPU\u5229\u7528\u7387\u306e\u6700\u5927\u306fCPU\u30b3\u30a2\u6570\u00d7100%\u3068\u306a\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

CPU\u306b\u4f59\u88d5\u304c\u3042\u308b\u306e\u306b\u51e6\u7406\u304c\u9045\u3044\u5834\u5408\u3001\u30c7\u30a3\u30b9\u30afIO\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8ee2\u9001\u3084\u30ed\u30c3\u30af\u5f85\u3061\u306a\u3069\u306b\u539f\u56e0\u304c\u3042\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u30c7\u30a3\u30b9\u30afIO\u306b\u554f\u984c\u304c\u3042\u308b\u5834\u5408\u306f\u30ed\u30fc\u30c9\u30a2\u30d9\u30ec\u30fc\u30b8\u3068iowait\u304c\u5171\u306b\u9ad8\u304f\u306a\u308b\u50be\u5411\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u6c17\u306b\u7559\u3081\u3066\u304a\u304f\u3068\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n

top\u30b3\u30de\u30f3\u30c9\u3067\u8abf\u67fb\u3067\u304d\u308b\u4e8b\u306f\u307e\u3060\u3042\u308a\u307e\u3059\u304c\u3001\u554f\u984c\u306e\u51e6\u7406\u304c\u7d42\u308f\u3063\u3066\u3057\u307e\u3046\u524d\u306b\u6025\u3044\u3067\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u306e\u53d6\u5f97\u306b\u304b\u304b\u308a\u307e\u3059\u3002
\n\u51fa\u529b\u5185\u5bb9\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u51fa\u3057\u3066\u304a\u3044\u3066\u3001\u5f8c\u3067\u843d\u3061\u7740\u3044\u3066\u78ba\u8a8d\u3059\u308b\u306e\u3082\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n

\u307e\u305f\u3001\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u53d6\u5f97\u3059\u308b\u306b\u306f\u307e\u305ajava\u30d7\u30ed\u30bb\u30b9\u306e\u30d7\u30ed\u30bb\u30b9ID\u3092\u8abf\u3079\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\nctrl+c \u3067top\u30b3\u30de\u30f3\u30c9\u3092\u629c\u3051\u308b\u524d\u306b\u3001\u7591\u308f\u3057\u3044java\u30d7\u30ed\u30bb\u30b9\u306e\u30d7\u30ed\u30bb\u30b9ID\u3092\u30e1\u30e2\uff08or \u30af\u30ea\u30c3\u30d7\u30dc\u30fc\u30c9\u306b\u30b3\u30d4\u30fc\uff09\u3057\u3066\u304a\u304f\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002
\n\u30d7\u30ed\u30bb\u30b9ID\u306fps\u30b3\u30de\u30f3\u30c9\u3084\u3001java\u30d7\u30ed\u30bb\u30b9\u306e\u30d7\u30ed\u30bb\u30b9ID\u3092\u8abf\u3079\u308b\u305f\u3081\u306ejps\u30b3\u30de\u30f3\u30c9\u3067\u53d6\u5f97\u3057\u3066\u3082\u69cb\u3044\u307e\u305b\u3093\u3002<\/p>\n

\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306e\u53d6\u5f97<\/h2>\n

java\u30d7\u30ed\u30bb\u30b9\u306e\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u53d6\u308b\u306b\u306fjstack\u30b3\u30de\u30f3\u30c9\u3092\u5229\u7528\u3057\u307e\u3059\u3002<\/p>\n

$ jstack {\u30d7\u30ed\u30bb\u30b9ID}<\/div>\n

jstack\u30b3\u30de\u30f3\u30c9\u306b\u30d1\u30b9\u304c\u901a\u3063\u3066\u3044\u306a\u3044\u5834\u5408\u306fjstack\u30b3\u30de\u30f3\u30c9\u3092\u63a2\u3057\u3066\u30d5\u30eb\u30d1\u30b9\u3067\u5b9f\u884c\u3057\u3066\u304f\u3060\u3055\u3044\u3002
\n\u666e\u901a\u306fJava\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306ebin\u306e\u4e2d(\u4f8b\u3048\u3070\/usr\/java\/jdkXXXX\/bin\/jstack)\u306b\u3042\u308a\u307e\u3059\u3002
\n\u307e\u305f\u3001jstack\u30b3\u30de\u30f3\u30c9\u306e\u5b9f\u884c\u306f\u3001\u5bfe\u8c61\u306ejava\u30d7\u30ed\u30bb\u30b9\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u3067\u884c\u3046\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306fjava\u30d7\u30ed\u30bb\u30b9\u306bSIGQUIT\u30b7\u30b0\u30ca\u30eb\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u3067\u3082\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002
\n\u3053\u306e\u5834\u5408\u306f\u3001\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306fjava\u30d7\u30ed\u30bb\u30b9\u306e\u6a19\u6e96\u51fa\u529b\u3084\u30a8\u30e9\u30fc\u51fa\u529b\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\u306e\u3067\u3001\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306a\u3069\u304b\u3089\u78ba\u8a8d\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002
\n\u30d7\u30ed\u30bb\u30b9\u306b\u9593\u9055\u3063\u305f\u30b7\u30b0\u30ca\u30eb\u3092\u9001\u3063\u3066\u3057\u307e\u3046\u5371\u967a\u306a\u3069\u3082\u8003\u616e\u3059\u308b\u3068\u3001\u53ef\u80fd\u3067\u3042\u308c\u3070jstack\u30b3\u30de\u30f3\u30c9\u3092\u5229\u7528\u3057\u305f\u307b\u3046\u304c\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n

\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306e\u53d6\u5f97\u306b\u306f\u3001\u305d\u308c\u307b\u3069\u5927\u304d\u306a\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3092\u5fc5\u8981\u3068\u3057\u307e\u305b\u3093\u3002
\n\u300c\u4f55\u304b\u304a\u304b\u3057\u3044\u304b\u3082\uff1f\u300d\u3068\u611f\u3058\u305f\u5834\u5408\u306f\u3001\u554f\u984c\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3068\u306a\u308b\u51e6\u7406\u3092\u629c\u3051\u3066\u3057\u307e\u3046\u524d\u306b\u53d6\u5f97\u3057\u3066\u304a\u304f\u3068\u826f\u3044\u3067\u3057\u3087\u3046\u3002
\n\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3001\u9069\u5ea6\u306b\u9593\u9694\u3092\u958b\u3051\u3066\u6570\u56de\u53d6\u5f97\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u306b\u4fdd\u5b58\u3057\u3066\u304a\u304f\u3068\u8abf\u67fb\u306e\u969b\u306b\u6709\u7528\u3067\u3059\u3002<\/p>\n

$ #\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u6570\u79d2\u304a\u304d\u306b\u5b9f\u884c\u3057\u3066\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u53d6\u5f97\u3059\u308b<\/span>
$ jstack {\u30d7\u30ed\u30bb\u30b9ID} > threaddump.$(date +%F-%H%m%S)\n<\/div>\n

\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3068\u4f3c\u305f\u3088\u3046\u306a\u3082\u306e\u306b\u3001\u73fe\u5728\u306e\u30e1\u30e2\u30ea\u72b6\u6cc1\u3092\u51fa\u529b\u3059\u308b\u30d2\u30fc\u30d7\u30c0\u30f3\u30d7\u304c\u3042\u308a\u307e\u3059\u3002
\n\u3053\u3061\u3089\u3082\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306a\u3069\u306e\u8abf\u67fb\u306b\u5f79\u7acb\u3064\u60c5\u5831\u3067\u3059\u304c\u3001\u30d2\u30fc\u30d7\u30c0\u30f3\u30d7\u3092\u53d6\u5f97\u3059\u308b\u969b\u3001\u5229\u7528\u4e2d\u306e\u30e1\u30e2\u30ea\u91cf\u306b\u5fdc\u3058\u3066\u505c\u6b62\u6642\u9593\u304c\u767a\u751f\u3059\u308b\u305f\u3081\u5341\u5206\u6ce8\u610f\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u8abf\u3079\u308b\u524d\u306b\u2026\u2026<\/h2>\n

\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u6ca2\u5c71\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u5354\u8abf\u3057\u3066\u51e6\u7406\u3092\u884c\u3063\u3066\u3044\u308b\u305f\u3081\u3001\u53ef\u80fd\u3067\u3042\u308c\u3070\u554f\u984c\u306e\u30b9\u30ec\u30c3\u30c9\u306e\u30b9\u30ec\u30c3\u30c9ID\u3092\u7279\u5b9a\u3057\u3066\u304a\u304d\u305f\u3044\u3068\u3053\u308d\u3067\u3059\u3002
\n\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306a\u3069\u3092\u898b\u3066\u554f\u984c\u306e\u30b9\u30ec\u30c3\u30c9\u306b\u76ee\u661f\u3092\u3064\u3051\u3066\u304a\u304f\u3068\u8abf\u67fb\u304c\u3050\u3063\u3068\u697d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u8aad\u3080<\/h2>\n

\u30ed\u30b0\u306a\u3069\u304b\u3089\u554f\u984c\u306e\u30b9\u30ec\u30c3\u30c9ID\u304c\u5206\u3063\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u5bfe\u8c61\u306e\u30b9\u30ec\u30c3\u30c9\u306e\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u3092\u3001\u6642\u7cfb\u5217\u3092\u8ffd\u3063\u3066\u8abf\u3079\u3066\u3044\u304f\u3068\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n

\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u898b\u308b\u5834\u5408\u306f\u3001\u8907\u6570\u56de\u53d6\u5f97\u3057\u3066\u5185\u5bb9\u3092\u6bd4\u8f03\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002
\n\u4e00\u56de\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u53d6\u5f97\u3057\u305f\u3060\u3051\u3067\u306f\u3001\u5bfe\u8c61\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u5076\u7136\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u306b\u306a\u3063\u3066\u3044\u306a\u3044\u30e1\u30bd\u30c3\u30c9\u3067\u51e6\u7406\u3092\u884c\u3063\u3066\u3044\u305f\u969b\u306e\u30b9\u30bf\u30c3\u30af\u3092\u53d6\u5f97\u3057\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002
\n\u4e00\u5b9a\u306e\u9593\u9694\u53d6\u5f97\u3057\u305f\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u8abf\u3079\u308b\u3053\u3068\u3067\u3001\u51e6\u7406\u306b\u6642\u9593\u304c\u304b\u304b\u3063\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u554f\u984c\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u5206\u3063\u3066\u3044\u306a\u3044\u3068\u304d\u306b\u306f\u3001\u5168\u30b9\u30ec\u30c3\u30c9\u306e\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u304b\u3089\u7591\u308f\u3057\u3044\u30b9\u30ec\u30c3\u30c9\u3092\u7d5e\u308a\u8fbc\u3093\u3067\u3044\u304f\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002
\n\u3053\u306e\u6642\u3082\u3001\u5404\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u306e\u4e0a\u90e8\u306b\u8a18\u3055\u308c\u3066\u3044\u308b\u30b9\u30ec\u30c3\u30c9\u306eState\u3084\u3001\u5b9f\u884c\u3057\u3066\u3044\u308b\u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u306e\u30b9\u30ec\u30c3\u30c9\u540d\u306e\u30d1\u30bf\u30fc\u30f3\u306a\u3069\u304b\u3089\u3042\u308b\u7a0b\u5ea6\u5bfe\u8c61\u30b9\u30ec\u30c3\u30c9\u3092\u7d5e\u308a\u8fbc\u3080\u3068\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n

\u7d9a\u3044\u3066\u3001\u3042\u308a\u304c\u3061\u306a\u30c8\u30e9\u30d6\u30eb\u767a\u751f\u6642\u306e\u5b9f\u969b\u306e\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u3092\u4f8b\u793a\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n

\u30c7\u30c3\u30c9\u30ed\u30c3\u30af<\/h3>\n\n

\u4ee5\u4e0b\u306fJava\u306esynchronized\u6587\u3092\u5165\u308c\u5b50\u306b\u3057\u3066\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3092\u767a\u751f\u3055\u305b\u305f\u969b\u306e\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3067\u3059\u3002<\/p>\n

*snip*
\nFound one Java-level deadlock:
=============================
\"Thread-7\":
waiting to lock monitor 0x00007fc1b80cdbe8 (object 0x00000000f5f03a60, a java.lang.Object),
which is held by \"Thread-6\"
\"Thread-6\":
waiting to lock monitor 0x00007fc1b80cc5e8 (object 0x00000000f5f03a70, a java.lang.Object),
which is held by \"Thread-7\"<\/p>\n

Java stack information for the threads listed above:
===================================================
\"Thread-7\":
\tat com.techscore.sandbox.Servlets$DeadLock.lambda$doGet$1(Servlets.java:68)
\t- waiting to lock <0x00000000f5f03a60> (a java.lang.Object)
\t- locked <0x00000000f5f03a70> (a java.lang.Object)
\tat com.techscore.sandbox.Servlets$DeadLock$$Lambda$3\/236118405.run(Unknown Source)
\tat java.lang.Thread.run(Thread.java:745)
\"Thread-6\":
\tat com.techscore.sandbox.Servlets$DeadLock.lambda$doGet$0(Servlets.java:60)
\t- waiting to lock <0x00000000f5f03a70> (a java.lang.Object)
\t- locked <0x00000000f5f03a60> (a java.lang.Object)
\tat com.techscore.sandbox.Servlets$DeadLock$$Lambda$2\/1872773875.run(Unknown Source)
\tat java.lang.Thread.run(Thread.java:745)<\/p>\n

Found 1 deadlock.<\/p><\/div>\n

Java\u30ec\u30d9\u30eb\u3067\u306e\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306f\u3001\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u53d6\u5f97\u6642\u306b\u81ea\u52d5\u7684\u306b\u691c\u51fa\u3057\u3066\u304f\u308c\u308b\u306e\u3067\u3001\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306e\u6700\u5f8c\u3092\u898b\u308c\u3070\u3059\u3050\u306b\u5206\u308a\u307e\u3059\u3002
\n\u3053\u306e\u5834\u5408\u3001\u5916\u90e8\u304b\u3089\u30ed\u30c3\u30af\u3092\u89e3\u9664\u3059\u308b\u3053\u3068\u306f\u96e3\u3057\u3044\u305f\u3081\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u518d\u8d77\u52d5\u3059\u308b\u3053\u3068\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n

\u30cd\u30c3\u30c8\u30ef\u30fc\u30afIO\u5f85\u3061<\/h3>\n\n

\u6b21\u306f\u3001\u9577\u6642\u9593\u306eSQL\u30af\u30a8\u30ea\u306e\u767a\u884c\u3084\u3001API\u901a\u4fe1\u306a\u3069\u306b\u3088\u308a\u3001\u30b9\u30ec\u30c3\u30c9\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u307e\u3063\u3066\u3044\u308b\u5834\u5408\u306e\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u3067\u3059\u3002<\/p>\n

*snip*
\n\"http-nio-8080-exec-1\" #24 daemon prio=5 os_prio=0 tid=0x00007fc1bc003000 nid=0x4dc0 runnable [0x00007fc1d833f000]
java.lang.Thread.State: RUNNABLE
\tat java.net.SocketInputStream.socketRead0(Native Method)
\tat java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
\tat java.net.SocketInputStream.read(SocketInputStream.java:170)
\tat java.net.SocketInputStream.read(SocketInputStream.java:141)
\tat java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
\tat java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
\tat java.io.BufferedInputStream.read(BufferedInputStream.java:345)
\t- locked <0x00000000f5d13d88> (a java.io.BufferedInputStream)
\tat sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:704)
\tat sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:647)
\tat sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1536)
\t- locked <0x00000000f5cce298> (a sun.net.www.protocol.http.HttpURLConnection)
\tat sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441)
\t- locked <0x00000000f5cce298> (a sun.net.www.protocol.http.HttpURLConnection)
\tat com.techscore.sandbox.Servlets$NetworkIO.doGet(Servlets.java:45)
\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
*snip*<\/div>\n

\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u306e\u5148\u982d\u3092\u898b\u308b\u3068\u3001\u3053\u306e\u30b9\u30ec\u30c3\u30c9\u306f\u73fe\u5728socketRead0\u30e1\u30bd\u30c3\u30c9\u306e\u51e6\u7406\u4e2d\u306e\u3088\u3046\u3067\u3059\u3002
\n\u4f55\u5ea6\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u53d6\u5f97\u3057\u3066\u3082\u5e38\u306b\u540c\u3058\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u304c\u51fa\u529b\u3055\u308c\u308b\u3088\u3046\u306a\u3089\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u5f85\u3061\u7d9a\u3051\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n

\u3053\u306e\u5834\u5408\u3001\u300c\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u3088\u3046\u3068\u3057\u3066\u3044\u308b\u300d\u300c\u901a\u4fe1\u5148\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u51e6\u7406\u304c\u9577\u304f\u30ec\u30b9\u30dd\u30f3\u30b9\u304c\u9045\u5ef6\u3057\u3066\u3044\u308b\u300d\u300c\u901a\u4fe1\u5148\u3068\u306e\u63a5\u7d9a\u5207\u308c\u3092\u691c\u77e5\u3067\u304d\u305a\u306b\u5f85\u3061\u7d9a\u3051\u3066\u3044\u308b\u300d\u306a\u3069\u69d8\u3005\u306a\u8981\u56e0\u304c\u60f3\u5b9a\u3055\u308c\u307e\u3059\u3002
\n\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u5fc5\u8981\u306a\u5bfe\u5fdc\u306f\u5909\u308f\u3063\u3066\u304d\u307e\u3059\u306e\u3067\u3001\u51e6\u7406\u306e\u5185\u5bb9\u3084\uff08\u53ef\u80fd\u3067\u3042\u308c\u3070\uff09\u901a\u4fe1\u5148\u30b5\u30fc\u30d0\u306e\u72b6\u6cc1\u3092\u8abf\u67fb\u3057\u3066\u5224\u65ad\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u901a\u4fe1\u306e\u5207\u65ad\u3092\u691c\u77e5\u3067\u304d\u306a\u304b\u3063\u305f\u5834\u5408\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\u306e\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u306e\u3067\u3042\u308c\u3070\u3001\u6c38\u9060\u306b\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u5f85\u3061\u7d9a\u3051\u3066\u3057\u307e\u3046\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002
\nJava\u306eHTTPUrlConnection\u306a\u3069\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u304c0\uff08\u7121\u9650\uff09\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u9069\u5207\u306a\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

UrlConnection#setConnectTimeout<\/a>
\nUrlConnection#setReadTimeout<\/a><\/p>\n

\u30eb\u30fc\u30d7\u4e2d\u306e\u6b63\u898f\u8868\u73fe\u30b3\u30f3\u30d1\u30a4\u30eb<\/h3>\n\n

\u3053\u3061\u3089\u306f\u3001\u30eb\u30fc\u30d7\u4e2d\u3067\u6b63\u898f\u8868\u73fe\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u51e6\u7406\u3092\u884c\u3063\u305f\u969b\u306e\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u3067\u3059\u3002<\/p>\n

*snip*
\n\"http-nio-8080-exec-1\" #24 daemon prio=5 os_prio=0 tid=0x00007f17c0003000 nid=0x487d runnable [0x00007f17f5103000]
java.lang.Thread.State: RUNNABLE
\tat java.util.regex.Pattern.atom(Pattern.java:2226)
\tat java.util.regex.Pattern.sequence(Pattern.java:2130)
\tat java.util.regex.Pattern.expr(Pattern.java:1996)
\tat java.util.regex.Pattern.compile(Pattern.java:1696)
\tat java.util.regex.Pattern.(Pattern.java:1351)
\tat java.util.regex.Pattern.compile(Pattern.java:1028)
\tat java.lang.String.replaceAll(String.java:2223)
\tat com.techscore.sandbox.Servlets$Regex.doGet(Servlets.java:87)
\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
*snip*<\/div>\n

\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5f85\u3061\u3068\u9055\u3044\u3001\u3053\u306e\u5834\u5408\u306fCPU\u51e6\u7406\u304c\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u306b\u306a\u308a\u307e\u3059\u3002
\n\u672c\u8a18\u4e8b\u3067\u4f8b\u793a\u3057\u305ftop\u30b3\u30de\u30f3\u30c9\u7d50\u679c\u306eCPU\u5229\u7528\u7387\u304c\u9ad8\u304f\u306a\u3063\u3066\u3044\u308b\u306e\u306f\u3001\u3053\u306e\u51e6\u7406\u3092\u5b9f\u884c\u4e2d\u306b\u53d6\u5f97\u3057\u305f\u305f\u3081\u3067\u3059\u3002<\/p>\n

CPU\u51e6\u7406\u3067\u6642\u9593\u304c\u304b\u304b\u3063\u3066\u3044\u308b\u5834\u5408\u3001\u51e6\u7406\u306e\u9032\u884c\u306e\u5fdc\u3058\u3066\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u304c\u5927\u304d\u304f\u5909\u5316\u3057\u3066\u3044\u304d\u307e\u3059\u306e\u3067\u3001\u4f55\u5ea6\u3082\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u3092\u53d6\u5f97\u3057\u3066\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3092\u5206\u6790\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u3092\u898b\u308b\u3068\u5206\u308a\u307e\u3059\u304c\u3001\u3053\u306e\u51e6\u7406\u3067\u306fString#replaceAll<\/a>\u5185\u3067\u6b63\u898f\u8868\u73fe\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u304c\u884c\u308f\u308c\u3066\u307e\u3059\u3002
\nString\u306b\u306f\u5f15\u6570\u306bString\u3067\u6b63\u898f\u8868\u73fe\u30d1\u30bf\u30fc\u30f3\u3092\u6307\u5b9a\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u304c\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u308c\u3089\u306f\u5185\u90e8\u3067\u6b63\u898f\u8868\u73fe\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u304c\u884c\u308f\u308c\u3066\u3044\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002
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