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java.lang.IllegalArgumentException: at least one goal must be specified	at org.apache.commons.lang3.Validate.notEmpty(Validate.java:251)	at org.springframework.roo.project.Execution.(Execution.java:48)	at org.springframework.roo.project.Plugin.getExecutions(Plugin.java:137)	at org.springframework.roo.project.Plugin.(Plugin.java:182)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)	at org.springframework.roo.project.maven.PomFactoryImpl.parseElements(PomFactoryImpl.java:164)	at org.springframework.roo.project.maven.PomFactoryImpl.getInstance(PomFactoryImpl.java:90)	at org.springframework.roo.project.PomManagementServiceImpl.parseUnparsedPoms(PomManagementServiceImpl.java:206)	at org.springframework.roo.project.PomManagementServiceImpl.updatePomCache(PomManagementServiceImpl.java:336)	at org.springframework.roo.project.PomManagementServiceImpl.getModuleForFileIdentifier(PomManagementServiceImpl.java:123)	at org.springframework.roo.project.AbstractProjectOperations.getModuleForFileIdentifier(AbstractProjectOperations.java:510)	at org.springframework.roo.classpath.TypeLocationServiceImpl.getProposedJavaType(TypeLocationServiceImpl.java:342)	at org.springframework.roo.classpath.TypeLocationServiceImpl.doesPathIndicateJavaType(TypeLocationServiceImpl.java:112)	at org.springframework.roo.classpath.TypeLocationServiceImpl.getPhysicalTypeIdentifier(TypeLocationServiceImpl.java:248)	at org.springframework.roo.classpath.DefaultPhysicalTypeMetadataProvider.onFileEvent(DefaultPhysicalTypeMetadataProvider.java:176)	at org.springframework.roo.file.monitor.polling.PollingFileMonitorService.publish(PollingFileMonitorService.java:429)	at org.springframework.roo.file.monitor.polling.PollingFileMonitorService.scanAll(PollingFileMonitorService.java:642)	at org.springframework.roo.process.manager.internal.MonitoringRequestCommand.callback(MonitoringRequestCommand.java:39)	at org.springframework.roo.process.manager.internal.MonitoringRequestCommand.callback(MonitoringRequestCommand.java:15)	at org.springframework.roo.process.manager.internal.DefaultProcessManager.doTransactionally(DefaultProcessManager.java:169)	at org.springframework.roo.process.manager.internal.DefaultProcessManager.completeStartup(DefaultProcessManager.java:139)	at org.springframework.roo.process.manager.internal.DefaultProcessManager.access$100(DefaultProcessManager.java:35)	at org.springframework.roo.process.manager.internal.DefaultProcessManager$1.frameworkEvent(DefaultProcessManager.java:68)	at org.apache.felix.framework.util.EventDispatcher.invokeFrameworkListenerCallback(EventDispatcher.java:774)	at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:725)	at org.apache.felix.framework.util.EventDispatcher.run(EventDispatcher.java:949)	at org.apache.felix.framework.util.EventDispatcher.access$000(EventDispatcher.java:54)	at org.apache.felix.framework.util.EventDispatcher$1.run(EventDispatcher.java:106)	at java.lang.Thread.run(Thread.java:662)