hikaricp

问题 Why does Spring Batch use 1 database connection for each thread? Stack: Java 8 Spring Boot 1.5 Spring Batch 3.0.7 HikariCP 2.7.6 DataSource config: batcdb (postgres) readdb (oracle) writedb (postgres) Each datasource is using HikariCP with default 10 connections each. Spring Batch config: ThreadExecutor-1: core-pool-size: 10 max-pool-size: 10 throttle-limit: 10 Job-1 Config / ThreadPoolTaskExecutor: (pool sizes and throttle limit set via application.yml) @Bean public Step job1Step() { return

问题 I'm writing a Spring Boot application which connects with Snowflake Data Warehouse and execute SQL queries on it. I have written a Configuration class for configuring Datasource for connecting to Snowflake Data Warehouse as follows: @Configuration @EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class}) public class DBConfig { Logger logger = LoggerFactory.getLogger(DBConfig.class); @Bean JdbcTemplate jdbcTemplate() throws IllegalAccessException, InvocationTargetException,

问题 I have an application that uses HikariCP for connection pooling against an SQL Server DB using JTDS. If I leave the app running overnight, in the morning the first query will hang with the stack trace below. If I request again then new queries will work OK. Is there a timeout I'm missing that will stop the first query from hanging? It seems to hang for about 10->20 minutes and then it starts working. So after 10->20 minutes the sockRead and hung thread disappears. I think the hung query then

问题 I've successfully integrated hibernate in my web app. I was happy with my persistence.xml configuration <persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0"> <persistence-unit name="PU"> <provider>org.hibernate.ejb.HibernatePersistence</provider> <properties> <property name="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider" /> <property name="hibernate.hbm2ddl.auto" value="validate" /> <property name="hibernate.dialect" value="org.hibernate

问题 I've successfully integrated hibernate in my web app. I was happy with my persistence.xml configuration <persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0"> <persistence-unit name="PU"> <provider>org.hibernate.ejb.HibernatePersistence</provider> <properties> <property name="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider" /> <property name="hibernate.hbm2ddl.auto" value="validate" /> <property name="hibernate.dialect" value="org.hibernate

问题 I've successfully integrated hibernate in my web app. I was happy with my persistence.xml configuration <persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0"> <persistence-unit name="PU"> <provider>org.hibernate.ejb.HibernatePersistence</provider> <properties> <property name="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider" /> <property name="hibernate.hbm2ddl.auto" value="validate" /> <property name="hibernate.dialect" value="org.hibernate

问题 I'm facing an error integrating HikariCP with Spring's JdbcTemplate. I'm using Spring 3.2.2, HikariCP 2.3.8 and sybase jconn4 version 7.0.0 Spring configuration : <bean id="hikariConfig" class="com.zaxxer.hikari.HikariConfig"> <property name="dataSourceClassName" value="com.sybase.jdbc4.jdbc.SybDataSource" /> <property name="connectionTestQuery" value="SELECT 1" /> <property name="maximumPoolSize" value="100" /> <property name="idleTimeout" value="60000" /> <property name="jdbcUrl" value=

问题 Hikari CP Version : 2.7.4 This is actually not an issue but some doubts. a) maxLifetime : retires the connection after 30 mins. Will it also create a new connection automatically at the time of killing it or it waits for a new request and then creates a new connectios? considering pool has more than minIdle. b) idleTimeout : it will drop after 10 mins of inactivity? but 10mins is too high. is it ok if i mark it as 10s(10 is min as seen from code) as otherwise there will always be connections

问题 I want to use HikariCP as JDBC connection pool in my Spring boot application. I have two datasources (MySQL database as the primary database and accessing those data through Hibernate and additionally an Oracle database for reading some other data through JDBCTemplate). I set the MySQL datasource as primary bean: @Bean @Primary @ConfigurationProperties("spring.datasource") public DataSourceProperties mySQLDataSourceProperties() { return new DataSourceProperties(); } @Bean @Primary

问题 I use jpa+hibernate+hikariCP. Today I got connection closed error. I setted connectionTimeout and ideleTimeout properties(hikari). If in meantime use does not do any operition hikari close the pool connections auto. So that I got closed connection problem. My question how can I set properly hiker(jpa,hibernate) properties so if user comes back after 3-4 hours and try to do some operation hikari auto reconnect to db? is it possible? I use hikari v2.6.1 and hibernate v5.2.8.Final 回答1: This