本文介绍了JDBCConnectionException&无法使用Spring Boot获取JDBC连接的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
当我使用JAPSER报告生成报告时，我的Spring Boot工作正常。
我面临的问题是应用程序引发休眠异常：
我在多次生成报告后收到此错误。
1 running delayed actions on {type: MASTER, group: null, band: 0}
2018-09-20 14:27:55.536 DEBUG 46148 --- [ XNIO-2 task-27]
n.s.j.engine.fill.JRBaseFiller : Fill 1: ended
2018-09-20 14:27:55.536 DEBUG 46148 --- [ XNIO-2 task-27]
n.s.j.engine.fill.JRFillDataset : Fill 1: closing query executer
2018-09-20 14:27:55.539 DEBUG 46148 --- [ XNIO-2 task-27]
n.s.j.engine.export.JRPdfExporter : glyph renderer block DEVANAGARI
2018-09-20 14:27:55.539 DEBUG 46148 --- [ XNIO-2 task-27]
n.s.j.engine.export.JRPdfExporter : glyph renderer block BENGALI
2018-09-20 14:27:55.539 DEBUG 46148 --- [ XNIO-2 task-27]
n.s.j.engine.export.JRPdfExporter : glyph renderer block TELUGU
2018-09-20 14:27:55.539 DEBUG 46148 --- [ XNIO-2 task-27]
n.s.j.engine.export.JRPdfExporter : glyph renderer block TAMIL
2018-09-20 14:27:55.539 DEBUG 46148 --- [ XNIO-2 task-27]
n.s.j.engine.export.JRPdfExporter : glyph renderer block GUJARATI
2018-09-20 14:27:55.539 DEBUG 46148 --- [ XNIO-2 task-27]
n.s.j.engine.export.JRPdfExporter : glyph renderer block KANNADA
2018-09-20 14:27:55.539 DEBUG 46148 --- [ XNIO-2 task-27]
n.s.j.engine.export.JRPdfExporter : glyph renderer block MALAYALAM
2018-09-20 14:27:55.539 DEBUG 46148 --- [ XNIO-2 task-27]
n.s.j.engine.export.JRPdfExporter : glyph renderer block ORIYA
2018-09-20 14:27:55.539 DEBUG 46148 --- [ XNIO-2 task-27]
n.s.j.engine.export.JRPdfExporter : glyph renderer block GURMUKHI
2018-09-20 14:27:55.539 DEBUG 46148 --- [ XNIO-2 task-27]
n.s.j.engine.export.JRPdfExporter : glyph renderer block SINHALA
2018-09-20 14:27:55.539 DEBUG 46148 --- [ XNIO-2 task-27]
n.s.j.engine.export.JRPdfExporter : glyph renderer block TIBETAN
2018-09-20 14:27:55.539 DEBUG 46148 --- [ XNIO-2 task-27]
n.s.j.engine.export.JRPdfExporter : glyph renderer block KHMER
2018-09-20 14:28:25.549 WARN 46148 --- [ XNIO-2 task-27]
o.h.engine.jdbc.spi.SqlExceptionHelper : SQL Error: 0, SQLState: null
2018-09-20 14:28:25.550 ERROR 46148 --- [ XNIO-2 task-27]
o.h.engine.jdbc.spi.SqlExceptionHelper : HikariPool-1 - Connection is not
available, request timed out after 30000ms.
2018-09-20 14:28:25.556 ERROR 46148 --- [ XNIO-2 task-27]
c.n.xx.aop.logging.LoggingAspect : Exception in
com.xx.xx.web.rest.GrueResource.generateRapportGrue() with cause =
'org.hibernate.exception.JDBCConnectionException: Unable to acquire JDBC
Connection' and exception = 'Could not open JPA EntityManager for
transaction; nested exception is
org.hibernate.exception.JDBCConnectionException: Unable to acquire JDBC
Connection'
org.springframework.transaction.CannotCreateTransactionException: Could not
open JPA EntityManager for transaction; nested exception is
org.hibernate.exception.JDBCConnectionException: Unable to acquire JDBC
Connection
推荐答案
您的连接数不足。
尝试将Hikari连接池设置为更大的数字：
spring.datasource.hikari.maximum-pool-size=10
这篇关于JDBCConnectionException&无法使用Spring Boot获取JDBC连接的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！