客户端尝试检出连接已超时

时间：2019-01-07 22:43:02

标签： spring spring-boot gradle build.gradle liquibase

请，有人可以帮忙吗？我正在尝试运行该应用程序，但始终出现此错误。有人有类似的问题吗？正在运行gradle应用

2019-01-07 23:29:19.827  WARN 4450 --- [           main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'liquibase' defined in class path resource [com/wikbit/configuration/LiquibaseConfiguration.class]: Invocation of init method failed; nested exception is liquibase.exception.DatabaseException: java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.
2019-01-07 23:29:19.844  INFO 4450 --- [           main] o.e.jetty.server.handler.ContextHandler  : Stopped o.s.b.c.e.j.JettyEmbeddedWebAppContext@864d4d{/,file:/tmp/jetty-docbase.1621285029316441126.8080/,UNAVAILABLE}
2019-01-07 23:29:19.856 ERROR 4450 --- [           main] o.s.boot.SpringApplication               : Application startup failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'liquibase' defined in class path resource [com/wikbit/configuration/LiquibaseConfiguration.class]: Invocation of init method failed; nested exception is liquibase.exception.DatabaseException: java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1191) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1180) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at com.wikbit.BachelorThesisApplication.main(BachelorThesisApplication.java:16) [classes/:na]
Caused by: liquibase.exception.DatabaseException: java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.
    at liquibase.integration.spring.SpringLiquibase.afterPropertiesSet(SpringLiquibase.java:390) ~[liquibase-core-3.5.3.jar:na]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    ... 16 common frames omitted
Caused by: java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.
    at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:118) ~[mchange-commons-java-0.2.3.4.jar:na]
    at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:77) ~[mchange-commons-java-0.2.3.4.jar:na]
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:687) ~[c3p0-0.9.2.1.jar:0.9.2.1]
    at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140) ~[c3p0-0.9.2.1.jar:0.9.2.1]
    at liquibase.integration.spring.SpringLiquibase.afterPropertiesSet(SpringLiquibase.java:385) ~[liquibase-core-3.5.3.jar:na]
    ... 18 common frames omitted
Caused by: com.mchange.v2.resourcepool.TimeoutException: A client timed out while waiting to acquire a resource from com.mchange.v2.resourcepool.BasicResourcePool@1d389f2 -- timeout at awaitAvailable()
    at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1416) ~[c3p0-0.9.2.1.jar:0.9.2.1]
    at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:606) ~[c3p0-0.9.2.1.jar:0.9.2.1]
    at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:526) ~[c3p0-0.9.2.1.jar:0.9.2.1]
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:755) ~[c3p0-0.9.2.1.jar:0.9.2.1]
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:682) ~[c3p0-0.9.2.1.jar:0.9.2.1]
    ... 20 common frames omitted

我下载了应用，需要将其用于一些研究。我为别人工作，而不是为我工作

1 个答案:

答案 0 :(得分：0)

超时错误通常是不是由您的应用程序本身引起的错误-这是与SQL数据库的连接问题。

如果您在本地处理DB，则可以检查超时设置并进行修改，以应对请求调用中的延迟。

如果您正在使用远程数据库m / c，则需要保持一致的连接。如果不确定如何使与计算机的连接与数据库机器保持一致，请编写一个简单的批处理脚本，该脚本对数据库服务器执行ping操作，并使连接保持活动状态，以供您的应用程序发送请求。

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