druid原理梳理

org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping/getHandlerInternal
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org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is com.alibaba.druid.pool.DataSourceClosedException: dataSource already closed at Sat Dec 18 23:27:57 CST 2021
	at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:245)
	at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373)
	at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:463)
	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:276)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
	at com.sun.proxy.$Proxy113.updateItemStockByNumId(Unknown Source)
	at com.shopin.message.TmallMessageHandler.tmallItemStockChanged(TmallMessageHandler.java:306)
	at com.shopin.message.TmallMessageHandler.onMessage(TmallMessageHandler.java:126)
	at com.taobao.api.internal.tmc.TmcHandler$3.run(TmcHandler.java:125)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	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: com.alibaba.druid.pool.DataSourceClosedException: dataSource already closed at Sat Dec 18 23:27:57 CST 2021
	at com.alibaba.druid.pool.DruidDataSource.getConnectionInternal(DruidDataSource.java:1108)
	at com.alibaba.druid.pool.DruidDataSource.getConnectionDirect(DruidDataSource.java:1012)
	at com.alibaba.druid.filter.FilterChainImpl.dataSource_connect(FilterChainImpl.java:4544)
	at com.alibaba.druid.filter.stat.StatFilter.dataSource_getConnection(StatFilter.java:662)
	at com.alibaba.druid.filter.FilterChainImpl.dataSource_connect(FilterChainImpl.java:4540)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:990)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:982)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:102)
	at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:204)
	... 17 more