-
Notifications
You must be signed in to change notification settings - Fork 1
Expand file tree
/
Copy pathindex.html
More file actions
1204 lines (560 loc) · 29.8 KB
/
Copy pathindex.html
File metadata and controls
1204 lines (560 loc) · 29.8 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<!doctype html>
<html class="theme-next pisces use-motion" lang="zh-Hans">
<head>
<meta charset="UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"/>
<meta http-equiv="Cache-Control" content="no-transform" />
<meta http-equiv="Cache-Control" content="no-siteapp" />
<link href="/lib/fancybox/source/jquery.fancybox.css?v=2.1.5" rel="stylesheet" type="text/css" />
<link href="//fonts.googleapis.com/css?family=Lato:300,300italic,400,400italic,700,700italic&subset=latin,latin-ext" rel="stylesheet" type="text/css">
<link href="/lib/font-awesome/css/font-awesome.min.css?v=4.6.2" rel="stylesheet" type="text/css" />
<link href="/css/main.css?v=5.1.0" rel="stylesheet" type="text/css" />
<meta name="keywords" content="Hexo, Pisces" />
<link rel="alternate" href="/atom.xml" title="「十年饮冰」" type="application/atom+xml" />
<link rel="shortcut icon" type="image/x-icon" href="/images/touxiang.jpg?v=5.1.0" />
<meta name="description" content="我没有梦想,但是我有一个野心">
<meta property="og:type" content="website">
<meta property="og:title" content="「十年饮冰」">
<meta property="og:url" content="http://yaccc.gitchub.io/index.html">
<meta property="og:site_name" content="「十年饮冰」">
<meta property="og:description" content="我没有梦想,但是我有一个野心">
<meta name="twitter:card" content="summary">
<meta name="twitter:title" content="「十年饮冰」">
<meta name="twitter:description" content="我没有梦想,但是我有一个野心">
<script type="text/javascript" id="hexo.configurations">
var NexT = window.NexT || {};
var CONFIG = {
root: '/',
scheme: 'Pisces',
sidebar: {"position":"left","display":"post"},
fancybox: true,
motion: true,
duoshuo: {
userId: 'undefined',
author: '博主'
},
algolia: {
applicationID: '',
apiKey: '',
indexName: '',
hits: {"per_page":10},
labels: {"input_placeholder":"Search for Posts","hits_empty":"We didn't find any results for the search: ${query}","hits_stats":"${hits} results found in ${time} ms"}
}
};
</script>
<link rel="canonical" href="http://yaccc.gitchub.io/"/>
<title> 「十年饮冰」 </title>
</head>
<body itemscope itemtype="http://schema.org/WebPage" lang="zh-Hans">
<div class="container one-collumn sidebar-position-left
page-home
">
<div class="headband"></div>
<header id="header" class="header" itemscope itemtype="http://schema.org/WPHeader">
<div class="header-inner"><div class="site-meta ">
<div class="custom-logo-site-title">
<a href="/" class="brand" rel="start">
<span class="logo-line-before"><i></i></span>
<span class="site-title">「十年饮冰」</span>
<span class="logo-line-after"><i></i></span>
</a>
</div>
<p class="site-subtitle"></p>
</div>
<div class="site-nav-toggle">
<button>
<span class="btn-bar"></span>
<span class="btn-bar"></span>
<span class="btn-bar"></span>
</button>
</div>
<nav class="site-nav">
<ul id="menu" class="menu">
<li class="menu-item menu-item-home">
<a href="/" rel="section">
<i class="menu-item-icon fa fa-fw fa-home"></i> <br />
首页
</a>
</li>
<li class="menu-item menu-item-categories">
<a href="/categories" rel="section">
<i class="menu-item-icon fa fa-fw fa-th"></i> <br />
分类
</a>
</li>
<li class="menu-item menu-item-about">
<a href="/about" rel="section">
<i class="menu-item-icon fa fa-fw fa-user"></i> <br />
关于
</a>
</li>
<li class="menu-item menu-item-archives">
<a href="/archives" rel="section">
<i class="menu-item-icon fa fa-fw fa-archive"></i> <br />
归档
</a>
</li>
<li class="menu-item menu-item-tags">
<a href="/tags" rel="section">
<i class="menu-item-icon fa fa-fw fa-tags"></i> <br />
标签
</a>
</li>
</ul>
</nav>
</div>
</header>
<main id="main" class="main">
<div class="main-inner">
<div class="content-wrap">
<div id="content" class="content">
<section id="posts" class="posts-expand">
<article class="post post-type-normal " itemscope itemtype="http://schema.org/Article">
<link itemprop="mainEntityOfPage" href="http://yaccc.gitchub.io/2017/07/22/深入分析JDBC超时机制/">
<span style="display:none" itemprop="author" itemscope itemtype="http://schema.org/Person">
<meta itemprop="name" content="谢照东">
<meta itemprop="description" content="">
<meta itemprop="image" content="/images/touxiang.jpg">
</span>
<span style="display:none" itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
<meta itemprop="name" content="「十年饮冰」">
<span style="display:none" itemprop="logo" itemscope itemtype="http://schema.org/ImageObject">
<img style="display:none;" itemprop="url image" alt="「十年饮冰」" src="">
</span>
</span>
<header class="post-header">
<h1 class="post-title" itemprop="name headline">
<a class="post-title-link" href="/2017/07/22/深入分析JDBC超时机制/" itemprop="url">
深入分析JDBC超时机制
</a>
</h1>
<div class="post-meta">
<span class="post-time">
<span class="post-meta-item-icon">
<i class="fa fa-calendar-o"></i>
</span>
<span class="post-meta-item-text">发表于</span>
<time title="Дата создания записи" itemprop="dateCreated datePublished" datetime="2017-07-22T17:54:34+08:00">
2017-07-22
</time>
</span>
<span class="post-category" >
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-folder-o"></i>
</span>
<span class="post-meta-item-text">分类于</span>
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/java/" itemprop="url" rel="index">
<span itemprop="name">java</span>
</a>
</span>
,
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/java/jdbc/" itemprop="url" rel="index">
<span itemprop="name">jdbc</span>
</a>
</span>
,
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/java/jdbc/数据库/" itemprop="url" rel="index">
<span itemprop="name">数据库</span>
</a>
</span>
,
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/java/jdbc/数据库/MySQL/" itemprop="url" rel="index">
<span itemprop="name">MySQL</span>
</a>
</span>
,
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/java/jdbc/数据库/MySQL/超时/" itemprop="url" rel="index">
<span itemprop="name">超时</span>
</a>
</span>
</span>
<span class="post-comments-count">
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-comment-o"></i>
</span>
<a href="/2017/07/22/深入分析JDBC超时机制/#comments" itemprop="discussionUrl">
<span class="post-comments-count ds-thread-count" data-thread-key="2017/07/22/深入分析JDBC超时机制/" itemprop="commentCount"></span>
</a>
</span>
</div>
</header>
<div class="post-body" itemprop="articleBody">
前言上周在线上出现出现报警,ID号码一直无法获取,但是只有这一台机器报警,所以第一时间先在服务治理平台上禁用掉这台机器保证服务正常。停掉机器后要排查问题,思考分析步骤如下:
通过监控发现只有一个key的ID调用发生下降(第一张),这台机器上的其他key没有任何问题,从数据库更新号段正常。是不是数据库死锁了?
这个key在其他机器更新key是正常的,排除数据库的问题,那么就是这台机器的问题
查看log,发现这台机器确实没有更新数据库,两个号段的buffer都是空的。为什么更新数据库失败呢?难道是大量的超时?
仔细检查log日志,发现并没有超时的error。首先没有超时,但是号段是null的,是
...
<!--noindex-->
<div class="post-button text-center">
<a class="btn" href="/2017/07/22/深入分析JDBC超时机制/#more" rel="contents">
阅读全文 »
</a>
</div>
<!--/noindex-->
</div>
<div>
</div>
<div>
</div>
<footer class="post-footer">
<div class="post-eof"></div>
</footer>
</article>
<article class="post post-type-normal " itemscope itemtype="http://schema.org/Article">
<link itemprop="mainEntityOfPage" href="http://yaccc.gitchub.io/2017/07/22/一次堆外OOM问题的排查/">
<span style="display:none" itemprop="author" itemscope itemtype="http://schema.org/Person">
<meta itemprop="name" content="谢照东">
<meta itemprop="description" content="">
<meta itemprop="image" content="/images/touxiang.jpg">
</span>
<span style="display:none" itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
<meta itemprop="name" content="「十年饮冰」">
<span style="display:none" itemprop="logo" itemscope itemtype="http://schema.org/ImageObject">
<img style="display:none;" itemprop="url image" alt="「十年饮冰」" src="">
</span>
</span>
<header class="post-header">
<h1 class="post-title" itemprop="name headline">
<a class="post-title-link" href="/2017/07/22/一次堆外OOM问题的排查/" itemprop="url">
一次堆外OOM问题的排查
</a>
</h1>
<div class="post-meta">
<span class="post-time">
<span class="post-meta-item-icon">
<i class="fa fa-calendar-o"></i>
</span>
<span class="post-meta-item-text">发表于</span>
<time title="Дата создания записи" itemprop="dateCreated datePublished" datetime="2017-07-22T16:59:05+08:00">
2017-07-22
</time>
</span>
<span class="post-category" >
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-folder-o"></i>
</span>
<span class="post-meta-item-text">分类于</span>
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/java/" itemprop="url" rel="index">
<span itemprop="name">java</span>
</a>
</span>
,
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/java/OOM/" itemprop="url" rel="index">
<span itemprop="name">OOM</span>
</a>
</span>
,
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/java/OOM/堆外内存泄露/" itemprop="url" rel="index">
<span itemprop="name">堆外内存泄露</span>
</a>
</span>
,
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/java/OOM/堆外内存泄露/垃圾回收/" itemprop="url" rel="index">
<span itemprop="name">垃圾回收</span>
</a>
</span>
,
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/java/OOM/堆外内存泄露/垃圾回收/GC/" itemprop="url" rel="index">
<span itemprop="name">GC</span>
</a>
</span>
</span>
<span class="post-comments-count">
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-comment-o"></i>
</span>
<a href="/2017/07/22/一次堆外OOM问题的排查/#comments" itemprop="discussionUrl">
<span class="post-comments-count ds-thread-count" data-thread-key="2017/07/22/一次堆外OOM问题的排查/" itemprop="commentCount"></span>
</a>
</span>
</div>
</header>
<div class="post-body" itemprop="articleBody">
背景线上服务有一台机器访问不通(一个管理平台),在公司的服务治理平台上查看服务的状况是正常的,说明进程还在。进程并没有完全crash掉。去线上查看机器日志,发现了大量的OOM异常:
1234567891011121314151617181920212223242526272829303132333435363738017-03-15 00:00:00.041 [WARN] qtp1947699202-120772 nio handle failedjava.lang.OutOfMemoryError: Direct buffer memory at java.nio.Bits.r
...
<!--noindex-->
<div class="post-button text-center">
<a class="btn" href="/2017/07/22/一次堆外OOM问题的排查/#more" rel="contents">
阅读全文 »
</a>
</div>
<!--/noindex-->
</div>
<div>
</div>
<div>
</div>
<footer class="post-footer">
<div class="post-eof"></div>
</footer>
</article>
<article class="post post-type-normal " itemscope itemtype="http://schema.org/Article">
<link itemprop="mainEntityOfPage" href="http://yaccc.gitchub.io/2017/03/31/Java-JDK代理、CGLIB、AspectJ代理分析比较/">
<span style="display:none" itemprop="author" itemscope itemtype="http://schema.org/Person">
<meta itemprop="name" content="谢照东">
<meta itemprop="description" content="">
<meta itemprop="image" content="/images/touxiang.jpg">
</span>
<span style="display:none" itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
<meta itemprop="name" content="「十年饮冰」">
<span style="display:none" itemprop="logo" itemscope itemtype="http://schema.org/ImageObject">
<img style="display:none;" itemprop="url image" alt="「十年饮冰」" src="">
</span>
</span>
<header class="post-header">
<h1 class="post-title" itemprop="name headline">
<a class="post-title-link" href="/2017/03/31/Java-JDK代理、CGLIB、AspectJ代理分析比较/" itemprop="url">
Java JDK代理、CGLIB、AspectJ代理分析比较
</a>
</h1>
<div class="post-meta">
<span class="post-time">
<span class="post-meta-item-icon">
<i class="fa fa-calendar-o"></i>
</span>
<span class="post-meta-item-text">发表于</span>
<time title="Дата создания записи" itemprop="dateCreated datePublished" datetime="2017-03-31T19:53:24+08:00">
2017-03-31
</time>
</span>
<span class="post-category" >
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-folder-o"></i>
</span>
<span class="post-meta-item-text">分类于</span>
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/java/" itemprop="url" rel="index">
<span itemprop="name">java</span>
</a>
</span>
,
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/java/动态代理/" itemprop="url" rel="index">
<span itemprop="name">动态代理</span>
</a>
</span>
,
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/java/动态代理/AOP/" itemprop="url" rel="index">
<span itemprop="name">AOP</span>
</a>
</span>
,
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/java/动态代理/AOP/AspectJ/" itemprop="url" rel="index">
<span itemprop="name">AspectJ</span>
</a>
</span>
,
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/java/动态代理/AOP/AspectJ/CGLIB/" itemprop="url" rel="index">
<span itemprop="name">CGLIB</span>
</a>
</span>
</span>
<span class="post-comments-count">
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-comment-o"></i>
</span>
<a href="/2017/03/31/Java-JDK代理、CGLIB、AspectJ代理分析比较/#comments" itemprop="discussionUrl">
<span class="post-comments-count ds-thread-count" data-thread-key="2017/03/31/Java-JDK代理、CGLIB、AspectJ代理分析比较/" itemprop="commentCount"></span>
</a>
</span>
</div>
</header>
<div class="post-body" itemprop="articleBody">
前言什么是代理,在Design patterns In java这个本书中是这样描述的,简单的说就是为某个对象提供一个代理,以控制对这个对象的访问。在不修改源代码的基础上做方法增强,代理是一种设计模式,又简单的分为两种。
静态代理:代理类和委托类在代码运行前关系就确定了,也就是说在代理类的代码一开始就已经存在了。
动态代理:动态代理类的字节码在程序运行时的时候生成。
静态代理先来看一个静态代理的例子,Calculator是一个计算器的接口类,定义了一个加法的接口方法,由CalculatorImpl类实现真正的加法操作.现在如果我们想对这个方法做一层静态的代理,这儿实现了一个简单的代理类实现
...
<!--noindex-->
<div class="post-button text-center">
<a class="btn" href="/2017/03/31/Java-JDK代理、CGLIB、AspectJ代理分析比较/#more" rel="contents">
阅读全文 »
</a>
</div>
<!--/noindex-->
</div>
<div>
</div>
<div>
</div>
<footer class="post-footer">
<div class="post-eof"></div>
</footer>
</article>
</section>
<nav class="pagination">
<span class="page-number current">1</span><a class="page-number" href="/page/2/">2</a><span class="space">…</span><a class="page-number" href="/page/6/">6</a><a class="extend next" rel="next" href="/page/2/"><i class="fa fa-angle-right"></i></a>
</nav>
</div>
</div>
<div class="sidebar-toggle">
<div class="sidebar-toggle-line-wrap">
<span class="sidebar-toggle-line sidebar-toggle-line-first"></span>
<span class="sidebar-toggle-line sidebar-toggle-line-middle"></span>
<span class="sidebar-toggle-line sidebar-toggle-line-last"></span>
</div>
</div>
<aside id="sidebar" class="sidebar">
<div class="sidebar-inner">
<section class="site-overview sidebar-panel sidebar-panel-active">
<div class="site-author motion-element" itemprop="author" itemscope itemtype="http://schema.org/Person">
<img class="site-author-image" itemprop="image"
src="/images/touxiang.jpg"
alt="谢照东" />
<p class="site-author-name" itemprop="name">谢照东</p>
<p class="site-description motion-element" itemprop="description">我没有梦想,但是我有一个野心</p>
</div>
<nav class="site-state motion-element">
<div class="site-state-item site-state-posts">
<a href="/archives">
<span class="site-state-item-count">16</span>
<span class="site-state-item-name">日志</span>
</a>
</div>
<div class="site-state-item site-state-categories">
<a href="/categories">
<span class="site-state-item-count">51</span>
<span class="site-state-item-name">分类</span>
</a>
</div>
<div class="site-state-item site-state-tags">
<a href="/tags">
<span class="site-state-item-count">42</span>
<span class="site-state-item-name">标签</span>
</a>
</div>
</nav>
<div class="feed-link motion-element">
<a href="/atom.xml" rel="alternate">
<i class="fa fa-rss"></i>
RSS
</a>
</div>
<div class="links-of-author motion-element">
<span class="links-of-author-item">
<a href="https://github.com/Yaccc" target="_blank" title="GitHub">
<i class="fa fa-fw fa-github"></i>
GitHub
</a>
</span>
<span class="links-of-author-item">
<a href="http://weibo.com/u/2571066903" target="_blank" title="微博">
<i class="fa fa-fw fa-globe"></i>
微博
</a>
</span>
<span class="links-of-author-item">
<a href="http://www.zhihu.com/people/JAVAC" target="_blank" title="知乎">
<i class="fa fa-fw fa-globe"></i>
知乎
</a>
</span>
</div>