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解决Hadoop启动报错:File /opt/hadoop/tmp/mapred/system/jobtracker.info could only be replicated to 0 nodes, instead of 1
今天启动hadoop时,发现datanode启动不了,查看日志发现出现以下的错误: java.io.IOException: File /opt/hadoop/tmp/mapred/system/jobtracker.info could only be replicated to 0 nodes, ...
分类:其他好文   时间:2016-07-31 00:08:34    阅读次数:159
nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException
You should autowire interface AbstractManager instead of class MailManager. If you have different implemetations of AbstractManager you can write @Com ...
分类:编程语言   时间:2016-07-21 21:59:48    阅读次数:893
Codeforces#200 div.2
Description Mad scientist Mike entertains himself by arranging rows of dominoes. He doesn't need dominoes, though: he uses rectangular magnets instead. Each magnet has two poles, positive (a "plus"...
分类:其他好文   时间:2016-07-12 12:23:03    阅读次数:537
Visual Studio 常见错误
error C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. 项目 ...
分类:其他好文   时间:2016-07-09 22:18:10    阅读次数:222
初次使用VS2010基于C++开发项目碰到的问题及解决方法
1、将过去的工程用VS2010打开的时候。你有可能会遇到一大堆的警告:warning C4996。  比如:warning C4996: 'sprintf': This function or variable may be unsafe. Consider using sprintf_s instead. To disable deprecation, use _CRT_SECURE_NO_W...
分类:编程语言   时间:2016-07-06 15:09:36    阅读次数:316
2. creating and destroying objects
ref: book "Effective Java" 1. consider static factory methods instead of constructord 2. consider a builder when faced with many constructor parameter ...
分类:其他好文   时间:2016-07-05 22:28:43    阅读次数:117
Helpers\Assets
Helpers\Assets The assets helper is for loading CSS and JS files rather than writing out the full script/link tag for each and every item, instead add ...
分类:其他好文   时间:2016-07-05 13:45:36    阅读次数:120
cas no查询
<!-- BEGIN RESPONSIVE MENU TOGGLER --> <!-- END RESPONSIVE MENU TOGGLER --> <!-- BEGIN LOGO (you can use logo image instead of text)--> <!-- END LOGO ...
分类:其他好文   时间:2016-07-03 15:43:44    阅读次数:240
English - 英文写作中的最常见”十大句式“
英文写作中的最常见“十大句式” from 小木虫论坛 一、否定句 许多否定句不含not的否定结构。如果论文作者能正确使用他们,就会增加写作的闪光点,使文章显得生动活泼。 1、Instead of indulging in playing computer games, children should ...
分类:其他好文   时间:2016-06-17 12:49:45    阅读次数:223
linux sudo命令
sudo Instead of using the root user account, unprivileged users can be configured for using administrator permissions on specific tasks by using sudo. ...
分类:系统相关   时间:2016-06-16 17:45:08    阅读次数:244
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