Question

过一会儿，我一遍又一遍地在控制台中收到这些错误，在Hibernate和Sqlite中使用Spring Boot应用程序。服务器需要重新启动才能恢复，因为它无法获取与数据库的新连接。

从我的日志中，我怀疑这是在有2个线程的情况下发生的，一个线程写入一个表，另一个线程从该表中读取。这种情况很难重现，大约5个小时后就会发生。

我考虑过使用脏读，因为一致性不是那么重要。

在浏览类似问题时，我已将最大池大小设置为1，因为否则，我会得到Getting [SQLITE_BUSY] database file is locked with select statements

错误

2020-07-30 20:47:57.250  WARN 6 --- [pool-2-thread-2] o.h.engine.jdbc.spi.SqlExceptionHelper   : SQL Error: 0, SQLState: null
2020-07-30 20:47:57.251 ERROR 6 --- [pool-2-thread-2] o.h.engine.jdbc.spi.SqlExceptionHelper   : HikariPool-1 - Connection is not available, request timed out after 1500ms.
2020-07-30 20:47:57.366 ERROR 6 --- [pool-2-thread-2] o.s.s.s.TaskUtils$LoggingErrorHandler    : Unexpected error occurred in scheduled task

org.springframework.transaction.CannotCreateTransactionException: Could not open JPA EntityManager for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection
    at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JaTransactionManager.java:448)
    ...
Caused by: org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection
    at org.hibernate.dialect.SQLiteSQLExceptionConversionDelegate.convert(SQLiteSQLExceptionConversionDelegate.java:48) ~[sqlite-dialect-1.0.jar!/:5.4.17.Final]
    at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42) ~[hibernate-core-5.4.17.Final.jar!/:5.4.17.Final]
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113) ~[hibernate-core-5.4.17.Final.jar!/:5.4.17.Final]
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:99) ~[hibernate-core-5.4.17.Final.jar!/:5.4.17.Final]
    at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:107) ~[hibernate-core-5.4.17.Final.jar!/:5.4.17.Final]
    at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getPhysicalConnection(LogicalConnectionManagedImpl.java:134) ~[hibernate-core-5.4.17.Final.jar!/:5.4.17.Final]
    at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getConnectionForTransactionManagement(LogicalConnectionManagedImpl.java:259) ~[hibernate-core-5.4.17.Final.jar!/:5.4.17.Final]
    at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.begin(LogicalConnectionManagedImpl.java:267) ~[hibernate-core-5.4.17.Final.jar!/:5.4.17.Final]
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.begin(JdbcResourceLocalTransactionCoordinatorImpl.java:246) ~[hibernate-core-5.4.17.Final.jar!/:5.4.17.Final]
    at org.hibernate.engine.transaction.internal.TransactionImpl.begin(TransactionImpl.java:83) ~[hibernate-core-5.4.17.Final.jar!/:5.4.17.Final]
    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.beginTransaction(HibernateJpaDialect.java:184) ~[spring-orm-5.2.7.RELEASE.jar!/:5.2.7.RELEASE]
    at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:402) ~[spring-orm-5.2.7.RELEASE.jar!/:5.2.7.RELEASE]
    ... 22 common frames omitted
Caused by: java.sql.SQLTransientConnectionException: HikariPool-1 - Connection is not available, request timed out after 1500ms.

application.properties

spring.datasource.driverClassName=org.sqlite.JDBC
spring.datasource.max-active=1
spring.datasource.initialSize=1
spring.datasource.tomcat.initial-size=1
spring.datasource.maxIdle=1
spring.datasource.hikari.minimumIdle=1
spring.datasource.hikari.maximumPoolSize=1
spring.datasource.hikari.connectionTimeout=2500
spring.datasource.hikari.idleTimeout=1500
spring.datasource.tomcat.testOnBorrow=true
spring.datasource.tomcat.validationQuery=SELECT 1

春季启动，Hibernate，Hikari，SQLite无法从连接池获取JDBC连接

0 个答案: