最近在开发环境 oracle 启动侦听的时候,出现了 TNS:permission denied 的问题,通过网上和咨询朋友,最终找到了解决方案,现在共享出来给有需要的朋友. [oracle@oracle ~]$ lsnrctl start LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 27-MAR-2015 15:37:59 Copyright (c) 1991, 2009, Oracle. All rights reserved…
最近在学习传智播客吴超老师的Hadoop视频,里面他在讲解RPC通信原理的过程中给了一个RPC的小例子,但是自己编写的过程中遇到一个小错误,整理如下: log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).log4j:WARN Please initialize the log4j system properly.log4j:WARN See…
第 1章 数据库server监听错误 1.1.1数据库监听错误 1.1.1.1 问题及现象 server环境为ORACLE11G RAC环境,系统启动后,监听没起来. [oracle@RAC4 ~]$ lsnrctl status LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 29-JUN-2015 10:44:45 Copyright (c) 1991, 2011, Oracle. All rights reserved. C…
报错信息如下:PDOException: SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 3072 bytes: CREATE TABLE {start_zero_order} ( `id` INT unsigned NOT NULL auto_increment COMMENT 'The order id.', `username` VAR…