Question

在Spring Boot应用程序中执行过程时遇到异常。

import random
from PyQt5 import QtCore, QtGui, QtWidgets

if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication(sys.argv)
    pixmap = QtGui.QPixmap(640, 480)
    h_alignments = (QtCore.Qt.AlignLeft, QtCore.Qt.AlignRight, QtCore.Qt.AlignHCenter, QtCore.Qt.AlignJustify)
    v_alignments = (QtCore.Qt.AlignTop, QtCore.Qt.AlignBottom, QtCore.Qt.AlignVCenter, QtCore.Qt.AlignBaseline)
    pixmap.fill(QtGui.QColor("green"))
    w  = QtWidgets.QSplashScreen(pixmap)

    def on_timeout():
        a = random.choice(h_alignments) | random.choice(v_alignments)
        w.showMessage("Stack Overflow", alignment=a)

    timer = QtCore.QTimer(interval=100, timeout=on_timeout)
    timer.start()
    QtCore.QTimer.singleShot(10*1000, QtWidgets.QApplication.quit)
    w.show()
    sys.exit(app.exec_())

我在数据源中提供了以下属性。

org.springframework.dao.DataAccessResourceFailureException: Error retrieving database metadata; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is java.sql.SQLRecoverableException: Closed Connection
at org.springframework.jdbc.core.metadata.CallMetaDataProviderFactory.createMetaDataProvider(CallMetaDataProviderFactory.java:141) ~[spring-jdbc-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at org.springframework.jdbc.core.metadata.CallMetaDataContext.initializeMetaData(CallMetaDataContext.java:286) ~[spring-jdbc-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at org.springframework.jdbc.core.simple.AbstractJdbcCall.compileInternal(AbstractJdbcCall.java:303) ~[spring-jdbc-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at org.springframework.jdbc.core.simple.AbstractJdbcCall.compile(AbstractJdbcCall.java:288) ~[spring-jdbc-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at org.springframework.jdbc.core.simple.AbstractJdbcCall.checkCompiled(AbstractJdbcCall.java:348) ~[spring-jdbc-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at org.springframework.jdbc.core.simple.AbstractJdbcCall.doExecute(AbstractJdbcCall.java:386) ~[spring-jdbc-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at org.springframework.jdbc.core.simple.SimpleJdbcCall.execute(SimpleJdbcCall.java:193) ~[spring-jdbc-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) [spring-core-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:738) [spring-aop-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) [spring-aop-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136) [spring-tx-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) [spring-aop-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:673) [spring-aop-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at sun.reflect.GeneratedMethodAccessor119.invoke(Unknown Source) ~[?:?]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_191]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_191]
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333) [spring-aop-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) [spring-aop-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) [spring-aop-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at org.springframework.aop.interceptor.AsyncExecutionInterceptor$1.call(AsyncExecutionInterceptor.java:115) [spring-aop-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_191]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_191]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_191]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_191]
 Caused by: java.sql.SQLRecoverableException: Closed Connection
at oracle.jdbc.driver.PhysicalConnection.getMetaData(PhysicalConnection.java:4508) ~[ojdbc6-11.2.0.3.jar!/:11.2.0.3.0]
at sun.reflect.GeneratedMethodAccessor123.invoke(Unknown Source) ~[?:?]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_191]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_191]
at org.apache.tomcat.jdbc.pool.ProxyConnection.invoke(ProxyConnection.java:126) ~[tomcat-jdbc-8.5.15.jar!/:?]
at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:108) ~[tomcat-jdbc-8.5.15.jar!/:?]
at org.apache.tomcat.jdbc.pool.interceptor.AbstractCreateStatementInterceptor.invoke(AbstractCreateStatementInterceptor.java:79) ~[tomcat-jdbc-8.5.15.jar!/:?]
at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:108) ~[tomcat-jdbc-8.5.15.jar!/:?]
at org.apache.tomcat.jdbc.pool.DisposableConnectionFacade.invoke(DisposableConnectionFacade.java:81) ~[tomcat-jdbc-8.5.15.jar!/:?]
at com.sun.proxy.$Proxy78.getMetaData(Unknown Source) ~[?:?]
at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:331) ~[spring-jdbc-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]
at org.springframework.jdbc.core.metadata.CallMetaDataProviderFactory.createMetaDataProvider(CallMetaDataProviderFactory.java:73) ~[spring-jdbc-4.3.9.RELEASE.jar!/:4.3.9.RELEASE]

我用来执行其他一些过程的相同连接池及其正常运行。请在这里建议我所缺少的。

Answer 1

我已使用Hikari连接池解决了此问题。选中此link，了解如何用Hikari连接池替换默认的Tomcat连接池。

获取java.sql.SQLRecoverableException：Spring Boot应用程序中的Closed Connection

1 个答案: