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jdk version: 1.8
mariadb version: 10.6.1
springboot version: 2.2.1
This exception will occur after the program runs for a period of time
here is my error message:
`org.springframework.jdbc.Un…
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Please help me!
1. it occurred `CommunicationsException`, when I use MySQL `enableStreamingResults` processing more than 1 million data.
2. about 8 minutes after occurs the exception, when processin…
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部署之后，首页访问正常。但是点击其他其他会出现错误，具体错误如下：
```java
2020-02-01 13:50:42.321 ERROR 9408 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in con…
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## Bug Report
### Which version of ShardingSphere did you use?
5.1.1 and 5.2.1
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-JDBC
### Expected b…
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温少你好，我们最近使用druid出现了connection holder is null 的异常，参考前面的 文章你说需要将druid提升到1.1.5,我们已经将druid的版本提升到了1.1.8版本了，但是程序跑了几天还是会出现这个错误。
druid的配置信息是
filters=stat,config
maxActive=20
initialSize=1
maxWait=60000
…
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- 1.按照作者说明，去掉官方mybatis-spring-boot-starter 依赖，如下是我们项目与mybatis相关的依赖：
```
tk.mybatis
mapper-spring-boot-starter
1.2.0
com.github.pagehelper
pageh…
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- [ ] 我已在 [issues](https://github.com/pagehelper/Mybatis-PageHelper/issues) 搜索类似问题，并且不存在相同的问题.
## 异常模板
### 使用环境
* PageHelper 版本: 6.1.0
* 数据库类型和版本: MySQL 8.0.20
### 完整异常信息
source file pat…
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public void saveBatch() {
Country country = new Country();
country.setId(500);
country.setCountryname("dd");
country.setCountrycode("677");
int insertSize = countryMapper.insertList(Arr…
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2018-02-01 12:53:20.190 ERROR 1120 --- [nio-8081-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request p…
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运行环境：
openjdk 11.0.4 2019-07-16
OpenJDK Runtime Environment (build 11.0.4+11-post-Debian-1deb10u1)
OpenJDK 64-Bit Server VM (build 11.0.4+11-post-Debian-1deb10u1, mixed mode, sharing)
tomcat 9…