Upgrade failed - Cannot load repository. Plugins may have been disabled.

2011-10-14 08:38:32 	fatal 	bootstrap 	Bamboo has encountered errors while upgrading. Please resolve these errors and restart Bamboo. 	Upgrade task for build 2703 failed with exception: java.lang.IllegalStateException: Cannot load repository. Plugins may have been disabled. 

2011-10-14 08:38:32,478 ERROR [2-UpgradeTaskBackgroundThread:pool-8-thread-1] [DefaultRepositoryManager] Could not find repository plugin with key 'fr.calitech.bamboo.plugins.repository.dummy:dummy'. This build will be unable to build.
2011-10-14 08:38:32,479 ERROR [2-UpgradeTaskBackgroundThread:pool-8-thread-1] [AbstractUpgradeManager] com.atlassian.util.concurrent.LazyReference$InitializationException: java.lang.IllegalStateException: Cannot load repository. Plugins may have been disabled.
com.atlassian.util.concurrent.LazyReference$InitializationException: java.lang.IllegalStateException: Cannot load repository. Plugins may have been disabled.
	at com.atlassian.util.concurrent.LazyReference.getInterruptibly(LazyReference.java:152)
	at com.atlassian.util.concurrent.LazyReference.get(LazyReference.java:115)
	at com.atlassian.bamboo.repository.RepositoryDefinitionImpl.getRepository(RepositoryDefinitionImpl.java:121)
	at com.atlassian.bamboo.repository.migration.RepositoryConfigurationConverter.stripAndSaveRepositoryConfiguration(RepositoryConfigurationConverter.java:107)
	at com.atlassian.bamboo.upgrade.tasks.UpgradeTask2703MoveRepositoryConfigIntoTable$2.doInHibernate(UpgradeTask2703MoveRepositoryConfigIntoTable.java:105)
	at org.springframework.orm.hibernate.HibernateTemplate.execute(HibernateTemplate.java:370)
	at com.atlassian.bamboo.persistence.BambooTransactionHibernateTemplate$2.doInTransactionWithoutResult(BambooTransactionHibernateTemplate.java:51)
	at org.springframework.transaction.support.TransactionCallbackWithoutResult.doInTransaction(TransactionCallbackWithoutResult.java:33)
	at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:127)
	at com.atlassian.bamboo.persistence.BambooTransactionHibernateTemplate.execute(BambooTransactionHibernateTemplate.java:46)
	at com.atlassian.bamboo.upgrade.tasks.UpgradeTask2703MoveRepositoryConfigIntoTable.doUpgrade(UpgradeTask2703MoveRepositoryConfigIntoTable.java:89)
	at com.atlassian.bamboo.upgrade.AbstractUpgradeManager.runUpgradeTask(AbstractUpgradeManager.java:200)
	at com.atlassian.bamboo.upgrade.UpgradeManagerImpl.doUpgrade(UpgradeManagerImpl.java:91)
	at com.atlassian.bamboo.upgrade.UpgradeLauncher$1.call(UpgradeLauncher.java:115)
	at com.atlassian.bamboo.upgrade.UpgradeLauncher$1.call(UpgradeLauncher.java:112)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
	at java.util.concurrent.FutureTask$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 com.atlassian.bamboo.build.pipeline.concurrent.NamedThreadFactory$2.run(NamedThreadFactory.java:50)
	at java.lang.Thread.run(Thread.java:680)
Caused by: java.lang.IllegalStateException: Cannot load repository. Plugins may have been disabled.
	at com.atlassian.bamboo.repository.RepositoryReference.create(RepositoryReference.java:31)
	at com.atlassian.bamboo.repository.RepositoryReference.create(RepositoryReference.java:8)
	at com.atlassian.util.concurrent.LazyReference$Sync.run(LazyReference.java:326)
	at com.atlassian.util.concurrent.LazyReference.getInterruptibly(LazyReference.java:146)
	... 23 more
2011-10-14 08:38:32,480 INFO [2-UpgradeTaskBackgroundThread:pool-8-thread-1] [AbstractUpgradeManager] Completed upgrade task 2703 with errors.
2011-10-14 08:38:32,481 FATAL [main] [UpgradeLauncher] Upgrade task error: Upgrade task for build 2703 failed with exception: java.lang.IllegalStateException: Cannot load repository. Plugins may have been disabled.
2011-10-14 08:38:32,567 INFO [main] [AccessLogFilter] AccessLogFilter initialized. Format is: <user> <url> <starting memory free (kb)> +- <difference in free mem (kb)> <query time (ms)>