Added two builds to the queue, canceled the 2nd one, got a hibernate exception

org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is net.sf.hibernate.exception.GenericJDBCException: Cannot open connection
net.sf.hibernate.exception.GenericJDBCException: Cannot open connection
at net.sf.hibernate.exception.ErrorCodeConverter.handledNonSpecificException(ErrorCodeConverter.java:90)
at net.sf.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter.java:79)
at net.sf.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
at net.sf.hibernate.impl.BatcherImpl.convert(BatcherImpl.java:328)
at net.sf.hibernate.impl.BatcherImpl.openConnection(BatcherImpl.java:295)
at net.sf.hibernate.impl.SessionImpl.connect(SessionImpl.java:3373)
at net.sf.hibernate.impl.SessionImpl.connection(SessionImpl.java:3333)
at org.springframework.orm.hibernate.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:407)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:283)
at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:226)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:89)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:176)
at $Proxy7.addBuildResults(Unknown Source)
at com.atlassian.bamboo.builder.DefaultBuildExecutor.recordTheBuildCompletion(DefaultBuildExecutor.java:265)
at com.atlassian.bamboo.builder.DefaultBuildExecutor.doTask(DefaultBuildExecutor.java:104)
at com.atlassian.bamboo.container.BambooTask.run(BambooTask.java:33)
at java.lang.Thread.run(Unknown Source)
Caused by: java.sql.SQLException: An SQLException was provoked by the following failure: java.lang.InterruptedException
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:104)
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:65)
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:62)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:266)
at com.mchange.v2.c3p0.PoolBackedDataSource.getConnection(PoolBackedDataSource.java:94)
at net.sf.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:33)
at net.sf.hibernate.impl.BatcherImpl.openConnection(BatcherImpl.java:292)
... 13 more
Caused by: java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at com.mchange.v2.resourcepool.BasicResourcePool.awaitAcquire(BasicResourcePool.java:968)
at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:208)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:260)
... 16 more