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原创【登录服务器经常自动断开怎么回事】

1.检查服务器的配置文件是否设置自动断开时间 export TMOUT参数。如果有建议延长时间或者删除该配置。如果冲突建议更换一个ip。2.检查ip是否冲突。

2023-11-13 16:36:26 174

原创 telnet ip 端口 Unable to connect to remote host: Connection refused

建议将应用的配置文件中的端口号改为此服务器的ip而非127.0.0.1。netstat -anp |grep 端口号。若显示：127.0.0.1：端口号。

2023-11-13 16:24:33 1104 1

原创使用Nginx实现公网访问Redis 4.0/5.0的单机/主备/Proxy集群实例

Ecs购买&Redis实例购买一.安装Nginx购买ECS后，需要在ECS上安装Nginx，本文以ECS操作系统为Centos7.x为例进行安装，不同操作系统命令稍有不同。执行以下命令，添加Nginx到yum源。sudo rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm添加完之后，执行以下命令，查看是否已经添加成功。yum search n

2022-03-09 15:26:23 1157

原创华为云服务

华为云服务1.华为云服务：基于公有云X86部署系统（X86架构）2.华为云鲲鹏云服务：基于公有云鲲鹏云服务部署系统（arm架构）3.华为云stack8.0（HCS）：基于混合云X86部署（HCS还是私有云产品，只是和公有云服务体验类似、应用类似、可以和公有云互通，部署在客户数据中心，自己运维）4.华为云stack8.0(鲲鹏)：基于混合云鲲鹏部署系统（HCS还是私有云产品，只是和公有云服务体验类似、应用类似、可以和公有云互通，部署在客户数据中心，自己运维）5.华为云Stack Online

2021-10-28 14:09:30 3253

原创 2020-10-30

Cannot find a valid baseurl for repo: base/7/aarch64解决方案vi /etc/resolv.conf添加nameserver 114.114.114.114后保存退出

2020-10-30 11:23:30 194

原创 error 2002: Can‘t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock‘ (2)

FATAL: unable to connect to MySQL server on host 'localhost', port 3333, aborting...FATAL: error 2002: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)FATAL: `prepare' function failed: /usr/share/sysbench/tests/include/o

2020-10-27 09:59:54 409

原创 mybatis操作查询数据正常，但增删改数据库无变化的问题处理

因为数据库中表-设计表-选项-引擎选择的是innodb支持事务，所以代码insert,delete,update后要提交事务mapper.update(product);sqlSession.commit();如果引擎默认选择的是MyISAM是不支持事务的，所以不提交事务，数据库也会改变...

2020-07-08 20:38:47 903

原创 com.alibaba.fastjson.JSONException: exepct[, but error, pos 1, json : redis调用失败

com.alibaba.fastjson.JSONException: exepct '[', but error, pos 1, json : redis调用失败我的原因是redis服务没有启动cmd 运行redis和它的配置文件

2020-06-26 23:38:25 2217

原创 You have an error in your SQL syntax check the manual that corresponds to your MySQL server versio

Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near null,10at line 5 at sun.reflect.NativeConstruct...

2020-05-22 22:31:19 571

原创 java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for wf.sour

java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for wf.source.crm.mapper.找不到这个映射器可能是编译出问题， idea中，delete target文件夹然后选中项目右键 rebuild module重新编译一下...

2020-05-21 14:38:40 300

原创 Cause: org.apache.ibatis.executor.ExecutorException:

A query was run and no Result Maps were found for the Mapped Statement 'cn.itsource.hello.mapper.ProductMapper.selectForList'. It's likely that neither a Result Type nor a Result Map was specified.原因是ProductMapper.xml中的selectForList方法里没有写resultMap...

2020-05-13 22:47:19 520

原创 Direct self-reference leading to cycle

HTTP Status 500 - Could not write content: Direct self-reference leading to cycle (through reference chain: java.util.ArrayList[6]->cn.itsource.domain.Producttype["parent"]); nested exception is co...

2020-05-03 23:29:09 12617 5

原创 com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'department0_.username' in

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException:Unknowncolumn'department0_.username'in'fieldlist'异常原因部门表中没有username这个字段看下部门类中的字段是否是username，如果是就改成name与页面字段匹配...

2020-04-22 19:15:28 360

原创 java.lang.IllegalArgumentException: Not an managed type: class java.lang.Object

java.lang.IllegalArgumentException: Not an managed type: class java.lang.Object由于IBaseRepository接口中不能确定泛型的类型，所以它就默认使用Object来代替那个泛型T解决方案IBaseRepository接口中添加@NoRepositoryBean...

2020-04-21 23:54:48 455

原创 Ambiguous mapping. Cannot map 'employeeController' method

Ambiguous mapping. Cannot map 'employeeController' method错误原因：controller层的方法名重复解决办法删除一个

2020-04-20 21:56:30 954

原创 NoUniqueBeanDefinitionException: No qualifying bean of type available

@Transactional(readOnly = true)public class BaseServiceImpl<T> implements IBaseService<T> { @Autowired private IBaseDao<T> baseDao;//一定要加泛型不然会报标题错误 @Override @Tra...

2020-04-20 17:07:34 484

原创 The following has evaluated to null or missing:遇到的异常处理

严重: Error executing FreeMarker templateFreeMarker template error:The following has evaluated to null or missing:==> title [in template “hello.ftl” at line 5, column 26]public class FreeMarkTes...

2020-03-31 14:05:31 1143

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