Running under IDEA Bamboo doesn't start after adding Maven builder

2008-04-02 15:55:27,591 FATAL [main] [UpgradeLauncher] Failed to initialise Bamboo container
java.lang.IllegalStateException: @NotNull method com/atlassian/bamboo/builder/MavenBuilder.getPath must not return null
	at com.atlassian.bamboo.builder.MavenBuilder.getPath(MavenBuilder.java)
	at com.atlassian.bamboo.builder.AbstractBuilder.validate(AbstractBuilder.java:691)
	at com.atlassian.bamboo.container.BambooContainer.reportBuilderConfigurationProblems(BambooContainer.java:345)
	at com.atlassian.bamboo.container.BambooContainer.reportBuildConfigurationProblems(BambooContainer.java:337)
	at com.atlassian.bamboo.container.BambooContainer.start(BambooContainer.java:229)
	at com.atlassian.bamboo.upgrade.UpgradeLauncher.upgradeAndStartBamboo(UpgradeLauncher.java:123)
	at com.atlassian.bamboo.upgrade.UpgradeLauncher.contextInitialized(UpgradeLauncher.java:37)
	at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:530)
	at org.mortbay.jetty.servlet.Context.startContext(Context.java:135)
	at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1218)
	at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:500)
	at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
	at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:117)
	at org.mortbay.jetty.Server.doStart(Server.java:217)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
	at com.atlassian.bamboo.server.Server.main(Server.java:60)
2008-04-02 15:55:27.129::WARN:  Failed startup of context org.mortbay.jetty.webapp.WebAppContext@1d1b16{/,/Users/asridhar/Bamboo/code/trunk_new/bamboo-web-app/src/main/webapp}
java.lang.RuntimeException: Failed to upgrade
	at com.atlassian.bamboo.upgrade.UpgradeLauncher.upgradeAndStartBamboo(UpgradeLauncher.java:138)
	at com.atlassian.bamboo.upgrade.UpgradeLauncher.contextInitialized(UpgradeLauncher.java:37)
	at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:530)
	at org.mortbay.jetty.servlet.Context.startContext(Context.java:135)
	at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1218)
	at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:500)
	at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
	at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:117)
	at org.mortbay.jetty.Server.doStart(Server.java:217)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
	at com.atlassian.bamboo.server.Server.main(Server.java:60)
Caused by: java.lang.IllegalStateException: @NotNull method com/atlassian/bamboo/builder/MavenBuilder.getPath must not return null
	at com.atlassian.bamboo.builder.MavenBuilder.getPath(MavenBuilder.java)
	at com.atlassian.bamboo.builder.AbstractBuilder.validate(AbstractBuilder.java:691)
	at com.atlassian.bamboo.container.BambooContainer.reportBuilderConfigurationProblems(BambooContainer.java:345)
	at com.atlassian.bamboo.container.BambooContainer.reportBuildConfigurationProblems(BambooContainer.java:337)
	at com.atlassian.bamboo.container.BambooContainer.start(BambooContainer.java:229)
	at com.atlassian.bamboo.upgrade.UpgradeLauncher.upgradeAndStartBamboo(UpgradeLauncher.java:123)
	... 11 more