A Bamboo build will be triggered twice. The build will run once, complete, and then will add itself to the queue again using the same revision number as the previous build.

2010-03-18 14:26:11,424 INFO [BAM::Events:pool-1-thread-4] [SvnRepository] Collecting changes for 'BMI2-DEF' on path 'http://svn/svn/biomedical/trunk' from version 24206 to 24206
2010-03-18 14:26:11,468 INFO [BAM::Events:pool-1-thread-9] [BuildQueueManagerImpl] Attempting to queue BMI2-DEF with BMI2-DEF-11.
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... // build execution
...
2010-03-18 14:41:30,935 INFO [bambooAgentMessageListenerConnector-1] [SaveBuildTask] Saving build results to disk...
2010-03-18 14:41:30,998 INFO [bambooAgentMessageListenerConnector-1] [SaveBuildTask] Generating build results summary...
2010-03-18 14:41:31,023 INFO [bambooAgentMessageListenerConnector-1] [SaveBuildTask] Indexing build results...
2010-03-18 14:41:31,196 INFO [bambooAgentMessageListenerConnector-1] [DefaultBuildResultsIndexer] Indexed BMI2-DEF-11, took: < 1 second
2010-03-18 14:41:31,197 INFO [bambooAgentMessageListenerConnector-1] [SaveBuildTask] Finished build: BMI2-DEF-11
2010-03-18 14:41:31,197 INFO [bambooAgentMessageListenerConnector-1] [SaveBuildTask] Finished building BMI2-DEF-11.
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... //build results are saved
...
2010-03-18 14:41:32,038 INFO [BAM::Events:pool-1-thread-3] [SvnRepository] Collecting changes for 'BMI2-DEF' on path 'http://svn/svn/biomedical/trunk' from version 24206 to 24206
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... // the plan is built to the same revision again.
...
2010-03-18 14:41:32,056 INFO [BAM::Events:pool-1-thread-3] [ChangeDetectionListenerAction] Change detection found 1 changes
2010-03-18 14:41:32,077 INFO [BAM::Events:pool-1-thread-5] [BuildQueueManagerImpl] Attempting to queue BMI2-DEF with BMI2-DEF-12.
2010-03-18 14:41:32,077 INFO [BAM::Events:pool-1-thread-5] [BuildQueueManagerImpl] Attempting to add to build queue...
2010-03-18 14:41:32,077 INFO [BAM::Events:pool-1-thread-5] [BuildQueueManagerImpl] Obtained write lock to add to build queue
2010-03-18 14:41:32,094 INFO [BAM::Events:pool-1-thread-5] [BuildQueueManagerImpl] Setting allowableAgents: [18219009],[21921805]
2010-03-18 14:41:32,095 INFO [BAM::Events:pool-1-thread-5] [BuildQueueManagerImpl] BMI2-DEF-12 added to queue.