报错信息
== Error configuring AutoCommit. Your driver may not support getAutoCommit() or setAutoCommit(). Requested setting: false. Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure==
15:59:07.225 [http-bio-8080-exec-5] DEBUG org.apache.ibatis.transaction.jdbc.JdbcTransaction - Opening JDBC Connection
15:59:07.228 [http-bio-8080-exec-5] DEBUG org.apache.ibatis.datasource.pooled.PooledDataSource - Checked out connection 769784976 from pool.
15:59:07.232 [http-bio-8080-exec-5] DEBUG org.apache.ibatis.transaction.jdbc.JdbcTransaction - Setting autocommit to false on JDBC Connection [com.mysql.jdbc.JDBC4Connection@2de1fc90]
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at edu.finance.web.servlet.BaseServlet.service(BaseServlet.java:43)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.ibatis.exceptions.PersistenceException:
### Error updating database. Cause: org.apache.ibatis.transaction.TransactionException: Error configuring AutoCommit. Your driver may not support getAutoCommit() or setAutoCommit(). Requested setting: false. Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 150,621 milliseconds ago. The last packet sent successfully to the server was 64 milliseconds ago.
### The error may exist in edu/finance/mapper/BrandMapper.xml
### The error may involve edu.finance.mapper.BrandMapper.deleteByIds
### The error occurred while executing an update
### Cause: org.apache.ibatis.transaction.TransactionException: Error configuring AutoCommit. Your driver may not support getAutoCommit() or setAutoCommit(). Requested setting: false. Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 150,621 milliseconds ago. The last packet sent successfully to the server was 64 milliseconds ago.
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:199)
at org.apache.ibatis.session.defaults.DefaultSqlSession.delete(DefaultSqlSession.java:212)
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:72)
at org.apache.ibatis.binding.MapperProxy$PlainMethodInvoker.invoke(MapperProxy.java:152)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:85)
at com.sun.proxy.$Proxy31.deleteByIds(Unknown Source)
at edu.finance.service.Impl.BrandServiceImpl.deleteByIds(BrandServiceImpl.java:59)
at edu.finance.web.servlet.BrandServlet.deleteByIds(BrandServlet.java:67)
... 25 more
Caused by: org.apache.ibatis.transaction.TransactionException: Error configuring AutoCommit. Your driver may not support getAutoCommit() or setAutoCommit(). Requested setting: false. Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 150,621 milliseconds ago. The last packet sent successfully to the server was 64 milliseconds ago.
at org.apache.ibatis.transaction.jdbc.JdbcTransaction.setDesiredAutoCommit(JdbcTransaction.java:108)
at org.apache.ibatis.transaction.jdbc.JdbcTransaction.openConnection(JdbcTransaction.java:143)
at org.apache.ibatis.transaction.jdbc.JdbcTransaction.getConnection(JdbcTransaction.java:61)
at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:337)
at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:86)
at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:49)
at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117)
at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76)
at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:197)
... 32 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
原因
根据博客 https://blog.csdn.net/weixin_42492886/article/details/112213743
应该是长时间不连接导致报错
解决
在配置文件mybatis-config.xml中加入如下配置：
<property name="poolPingQuery" value="SELECT NOW()" />
<property name="poolPingEnabled" value="true" />
完整版mybatis-config.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<typeAliases>
<package name="edu.finance.pojo"/>
</typeAliases>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql:///db1?useSSL=false"/>
<property name="username" value="xxx"/>
<property name="password" value="xxx"/>
<property name="poolPingQuery" value="SELECT NOW()" />
<property name="poolPingEnabled" value="true" />
</dataSource>
</environment>
</environments>
<mappers>
<!--扫描mapper-->
<package name="edu.finance.mapper"/>
</mappers>
</configuration>
两个配置项说明
链接: 在mybatis官网
说明如下：
poolPingQuery– 发送到数据库的侦测查询，用来检验连接是否正常工作并准备接受请求。默认是“NO PING QUERY SET”，这会导致多数数据库驱动出错时返回恰当的错误消息。poolPingEnabled– 是否启用侦测查询。若开启，需要设置poolPingQuery属性为一个可执行的 SQL 语句（最好是一个速度非常快的 SQL 语句），默认值：false。