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com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed.	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)	at java.lang.reflect.Constructor.newInstance(Unknown Source)	at com.mysql.jdbc.Util.handleNewInstance(Util.java:389)	at com.mysql.jdbc.Util.getInstance(Util.java:372)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:958)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:937)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:872)	at com.mysql.jdbc.ConnectionImpl.throwConnectionClosedException(ConnectionImpl.java:1236)	at com.mysql.jdbc.ConnectionImpl.checkClosed(ConnectionImpl.java:1231)	at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:4811)	at com.mchange.v2.c3p0.impl.NewProxyConnection.setAutoCommit(NewProxyConnection.java:881)	at com.atlassian.confluence.upgrade.recovery.DefaultRecoveryFileGenerator.generate(DefaultRecoveryFileGenerator.java:91)	at com.atlassian.confluence.upgrade.impl.DefaultUpgradeManager.entireUpgradeFinished(DefaultUpgradeManager.java:307)	at com.atlassian.confluence.upgrade.PluginFrameworkDependentUpgrader.startup(PluginFrameworkDependentUpgrader.java:29)	at com.atlassian.config.lifecycle.DefaultLifecycleManager.startUp(DefaultLifecycleManager.java:40)	at com.atlassian.config.lifecycle.LifecycleServletContextListener.contextInitialized(LifecycleServletContextListener.java:17)	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4973)	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467)	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)	at java.util.concurrent.FutureTask.run(Unknown Source)	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)	at java.lang.Thread.run(Unknown Source)