hikaricp

We have Spring-boot/Hibernate/PostgreSQL application in our project and use Hikari as the connection pool. We keep running into the following problem: after few hours active connections number grows to the limit and we get the errors like this (full stack trace is at the end of the question): Caused by: java.sql.SQLTransientConnectionException: HikariPool-0 - Connection is not available, request timed out after 30000ms. at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:213) ~[HikariCP-2.4.1.jar:na] at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:163) ~

In the documentation for HikariCP, it is mentioned that We strongly recommend setting this value, and it should be at least 30 seconds less than any database-level connection timeout. What are those database-level connection timeouts that should be taken into account for Oracle11.2 database? And how could I find those timeouts (queries to execute)? Short answer: none (by default). For the record (to include details here in case the link changes), we're talking about property maxLifetime of HikariCP : This property controls the maximum lifetime of a connection in the pool. An in-use connection

第2节（ 跟我学Spring Cloud（Finchley版）-02-构建分布式应用 ）说过： 应用没有监控，没有画板，一切指标都没有。在这个Growth Hack逐渐成为主流的时代，不弄个Dashboard把系统压力、QPS、CPU、内存、日活啥的可视化，你好意思出来混吗…… 本节我们来解决该问题。 Spring Boot Actuator是Spring Boot官方提供的监控组件。只需为项目添加以下依赖，即可就整合Spring Boot Actuator。 <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> 监控端点 Actuator为我们提供了很多监控端点，如下表所示。 端点（Spring Boot 2.x） 描述 HTTP方法 是否敏感 端点（Spring Boot 1.x） conditions 显示自动配置的信息 GET 是 autoconfig beans 显示应用程序上下文所有的Spring bean GET 是 beans configprops 显示所有@ConfigurationProperties的配置属性列表 GET 是 configprops dump

Hi I'm trying to use HikariCP with Spring for connection pool. I'm using jdbcTempLate and JdbcdaoSupport. This is my spring configuration file for datasource: <bean id="dataSource" class="com.zaxxer.hikari.HikariDataSource"> <property name="dataSourceClassName" value="oracle.jdbc.driver.OracleDriver"/> <property name="dataSource.url" value="jdbc:oracle:thin:@localhost:1521:XE"/> <property name="dataSource.user" value="username"/> <property name="dataSource.password" value="password"/> </bean> But unfortunately the following error message is generating: Cannot resolve reference to bean