参考连接:druid连接池配置参数 druid回收连接导致statement is closed 附异常信息: java.sql.SQLException: statement is closed at com.alibaba.druid.pool.DruidPooledStatement.checkOpen(DruidPooledStatement.java:181) at com.alibaba.druid.pool.DruidPooledPreparedStatement.setString(DruidPooledPreparedStatement.java...
Druid一般的用处有两个: 替代C3P0、DBCP数据库连接池(因为它的性能更好) 自带监控页面,实时监控应用的连接池情况 所以本文主要是使用Druid作为数据库连接池并且使用一下实时监控应用,做个入门学习~ 二、搭建Druid环境 由于简化配置,我就直接实用SpringBoot和SpringData JPA的方式来搭建一个Druid的Demo了~~~ 2.1引入po...
【转】java.sql.SQLException: statement is closed语句被关闭 druid连接池报错 我之前在用druid 1.0.28版本也出现过这个问题, 现象就是: 报这个错的时候, 往往会出现在一条毫无错误的sql执行上报错, sql放到数据库上执行或者单独拎出来执行完全没问题, 但是为什么一直报错呢? 问题就出在druid连接池上, 连接池在...
java.sql.SQLException: statement is closed at com.alibaba.druid.pool.DruidPooledStatement.checkOpen(DruidPooledStatement.java:75) at com.alibaba.druid.pool.DruidPooledStatement.clearBatch(DruidPooledStatement.java:512) at org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl.releaseStatements(Abstra...
数据库是oracle,使用了poolPreparedStatements,maxPoolPreparedStatementPerConnectionSize=5, 在使用一段时间以后,使用的缓存的statement不可用,报 SQL state [99999]; error code [17009]; Closed Statement; nested exception is java.sql.SQLException: Closed Statem
java.sql.SQLException: statement is closed at com.alibaba.druid.pool.DruidPooledStatement.checkOpen(DruidPooledStatement.java:74) at com.alibaba.druid.pool.DruidPooledStatement.clearBatch(DruidPooledStatement.java:529) at org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl.releaseStatements(Abstra...
<bean id="filter-log4j2" class="com.alibaba.druid.filter.logging.Log4j2Filter"> <property name="connectionLogEnabled" value="true" /> <property name="statementLogEnabled" value="true" /> <property name="statementExecutableSqlLogEnable" value="true" /> <property name="resultSet...
isClosed()) { lock.lock(); try { if (holder.active) { activeCount--; holder.active = false; } closeCount++; } finally { lock.unlock(); } return; } testOnReturn处理: 如果开启了testOnReturn,则发送测试数据,如果测试失败,则关闭连接。 代码语言:javascript 复制 if (testOnReturn) { ...
}}if(valid&&onFatalError){lock.lock();try{if(onFatalError){onFatalError=false;}}finally{lock.unlock();}}returnvalid;}if(conn.isClosed()){returnfalse;}if(null==validationQuery){returntrue;}Statementstmt=null;ResultSetrset=null;try{stmt=conn.createStatement();if(getValidationQueryTimeout()>0...
1. 在dbcp中PoolingDataSource(实现DataSource接口)调用 PoolableConnection(dbcp connnection 相关的pool delegate操作)进行相应关闭时,会检查_conn.isClosed(),针对DataSource如果isClosed返回为 true的则不调用returnObject,直接丢弃了链接。 2. _conn.isClosed()是否保险,从jdk的api描述中: A connection is closed...