MaxOpenPreparedStatements exception in ExplicitWatchAoUpgradeTask

com.atlassian.activeobjects.internal.ActiveObjectsInitException: bundle [com.atlassian.confluence.plugins.confluence-questions]
	at com.atlassian.activeobjects.osgi.TenantAwareActiveObjects$1$1$1.call(TenantAwareActiveObjects.java:105)
	at com.atlassian.activeobjects.osgi.TenantAwareActiveObjects$1$1$1.call(TenantAwareActiveObjects.java:92)
	at com.atlassian.sal.core.executor.ThreadLocalDelegateCallable.call(ThreadLocalDelegateCallable.java:42)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)
Caused by: com.mysema.query.QueryException: Caught SQLException for insert into "notifications" ("notificationid", "contentid", "username", "digest", "network")
values (1507359, 492085, 'ff80808148d41a4d0148d431709b0008', false, false)
	at com.mysema.query.sql.DefaultSQLExceptionTranslator.translate(DefaultSQLExceptionTranslator.java:38)
	at com.mysema.query.sql.Configuration.translate(Configuration.java:451)
	at com.mysema.query.sql.dml.SQLInsertClause.execute(SQLInsertClause.java:342)
	at com.atlassian.confluence.plugins.questions.internal.upgrade.ExplicitWatchAoUpgradeTask$ExplicitWatchBatchInserter.batchInsert(ExplicitWatchAoUpgradeTask.java:179)
	at com.atlassian.confluence.plugins.questions.internal.upgrade.ExplicitWatchAoUpgradeTask$ExplicitWatchBatchInserter.processRow(ExplicitWatchAoUpgradeTask.java:163)
	at org.springframework.jdbc.core.JdbcTemplate$RowCallbackHandlerResultSetExtractor.extractData(JdbcTemplate.java:1368)
	at org.springframework.jdbc.core.JdbcTemplate$1QueryStatementCallback.doInStatement(JdbcTemplate.java:448)
	at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:396)
	at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:458)
	at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:462)
	at com.atlassian.confluence.plugins.questions.internal.upgrade.ExplicitWatchAoUpgradeTask.upgrade(ExplicitWatchAoUpgradeTask.java:109)
	at com.atlassian.activeobjects.internal.ActiveObjectUpgradeManagerImpl$1.doInTransaction(ActiveObjectUpgradeManagerImpl.java:81)
	at com.atlassian.activeobjects.internal.ActiveObjectUpgradeManagerImpl$1.doInTransaction(ActiveObjectUpgradeManagerImpl.java:76)
	at com.atlassian.sal.core.transaction.HostContextTransactionTemplate$1.doInTransaction(HostContextTransactionTemplate.java:25)
	at com.atlassian.sal.spring.component.SpringHostContextAccessor$1.doInTransaction(SpringHostContextAccessor.java:88)
	at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:128)
	at com.atlassian.sal.spring.component.SpringHostContextAccessor.doInTransaction(SpringHostContextAccessor.java:82)
	at sun.reflect.GeneratedMethodAccessor186.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.atlassian.plugin.osgi.hostcomponents.impl.DefaultComponentRegistrar$ContextClassLoaderSettingInvocationHandler.invoke(DefaultComponentRegistrar.java:129)
	at $Proxy246.doInTransaction(Unknown Source)
	at sun.reflect.GeneratedMethodAccessor186.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.atlassian.plugin.osgi.bridge.external.HostComponentFactoryBean$DynamicServiceInvocationHandler.invoke(HostComponentFactoryBean.java:154)
	at $Proxy246.doInTransaction(Unknown Source)
	at com.atlassian.sal.core.transaction.HostContextTransactionTemplate.execute(HostContextTransactionTemplate.java:21)
	at sun.reflect.GeneratedMethodAccessor240.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
	at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.doInvoke(ServiceInvoker.java:58)
	at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.invoke(ServiceInvoker.java:62)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
	at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invokeUnprivileged(ServiceTCCLInterceptor.java:56)
	at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invoke(ServiceTCCLInterceptor.java:39)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.osgi.service.importer.support.LocalBundleContextAdvice.invoke(LocalBundleContextAdvice.java:59)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
	at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
	at $Proxy1263.execute(Unknown Source)
	at com.atlassian.activeobjects.internal.SalTransactionManager.inTransaction(SalTransactionManager.java:48)
	at com.atlassian.activeobjects.internal.AbstractLoggingTransactionManager.doInTransaction(AbstractLoggingTransactionManager.java:19)
	at com.atlassian.activeobjects.internal.EntityManagedActiveObjects.executeInTransaction(EntityManagedActiveObjects.java:276)
	at com.atlassian.activeobjects.internal.ActiveObjectUpgradeManagerImpl.upgrade(ActiveObjectUpgradeManagerImpl.java:75)
	at com.atlassian.activeobjects.internal.ActiveObjectUpgradeManagerImpl.upgrade(ActiveObjectUpgradeManagerImpl.java:41)
	at com.atlassian.activeobjects.internal.AbstractActiveObjectsFactory.upgrade(AbstractActiveObjectsFactory.java:104)
	at com.atlassian.activeobjects.internal.AbstractActiveObjectsFactory.create(AbstractActiveObjectsFactory.java:79)
	at com.atlassian.activeobjects.internal.DelegatingActiveObjectsFactory.create(DelegatingActiveObjectsFactory.java:40)
	at com.atlassian.activeobjects.osgi.TenantAwareActiveObjects$1$1$1.call(TenantAwareActiveObjects.java:99)
	... 7 more
Caused by: java.sql.SQLException: MaxOpenPreparedStatements limit reached
	at org.apache.tomcat.dbcp.dbcp.PoolingConnection.prepareStatement(PoolingConnection.java:109)
	at org.apache.tomcat.dbcp.dbcp.DelegatingConnection.prepareStatement(DelegatingConnection.java:281)
	at org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.prepareStatement(PoolingDataSource.java:313)
	at com.mysema.query.sql.dml.SQLInsertClause.prepareStatementAndSetParameters(SQLInsertClause.java:282)
	at com.mysema.query.sql.dml.SQLInsertClause.createStatements(SQLInsertClause.java:251)
	at com.mysema.query.sql.dml.SQLInsertClause.execute(SQLInsertClause.java:337)
	... 61 more
Caused by: java.util.NoSuchElementException: Pool exhausted
	at org.apache.tomcat.dbcp.pool.impl.GenericKeyedObjectPool.borrowObject(GenericKeyedObjectPool.java:1130)
	at org.apache.tomcat.dbcp.dbcp.PoolingConnection.prepareStatement(PoolingConnection.java:107)
	... 66 more