This may be a duplicate
I had filed another bug today using the auto report but I didn't
see it in Jira so I am filing this manually.
Here is the stack trace.

No message
java.lang.NullPointerException
	at org.jetbrains.idea.maven.state.MavenProjectsManager.synchronize(MavenProjectsManager.java:163)
	at org.jetbrains.idea.maven.state.MavenProjectsManager$4.run(MavenProjectsManager.java:127)
	at com.intellij.ide.startup.impl.StartupManagerImpl.a(StartupManagerImpl.java:19)
	at com.intellij.ide.startup.impl.StartupManagerImpl.access$100(StartupManagerImpl.java:40)
	at com.intellij.ide.startup.impl.StartupManagerImpl$1.run(StartupManagerImpl.java:2)
	at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:262)
	at com.intellij.ide.startup.impl.StartupManagerImpl.runProjectConfigurationActivities(StartupManagerImpl.java:34)
	at com.intellij.openapi.project.impl.ProjectManagerImpl.openProject(ProjectManagerImpl.java:208)
	at com.intellij.openapi.project.impl.ProjectManagerImpl.loadAndOpenProject(ProjectManagerImpl.java:149)
	at com.intellij.openapi.project.impl.ProjectManagerImpl.loadAndOpenProject(ProjectManagerImpl.java:274)
	at com.intellij.ide.impl.ProjectUtil.openProject(ProjectUtil.java:182)
	at com.intellij.ide.RecentProjectsManager$ReopenProjectAction.actionPerformed(RecentProjectsManager.java:6)
	at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.actionPerformed(ActionMenuItem.java:11)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
	at com.intellij.openapi.actionSystem.impl.ActionMenuItem.fireActionPerformed(ActionMenuItem.java:32)
	at com.intellij.ui.plaf.beg.BegMenuItemUI.a(BegMenuItemUI.java:105)
	at com.intellij.ui.plaf.beg.BegMenuItemUI.access$300(BegMenuItemUI.java:66)
	at com.intellij.ui.plaf.beg.BegMenuItemUI$MyMouseInputHandler.mouseReleased(BegMenuItemUI.java:4)
	at java.awt.Component.processMouseEvent(Component.java:6041)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
	at java.awt.Component.processEvent(Component.java:5806)
	at java.awt.Container.processEvent(Container.java:2058)
	at java.awt.Component.dispatchEventImpl(Component.java:4413)
	at java.awt.Container.dispatchEventImpl(Container.java:2116)
	at java.awt.Component.dispatchEvent(Component.java:4243)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
	at java.awt.Container.dispatchEventImpl(Container.java:2102)
	at java.awt.Window.dispatchEventImpl(Window.java:2440)
	at java.awt.Component.dispatchEvent(Component.java:4243)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
	at com.intellij.ide.IdeEventQueue.c(IdeEventQueue.java:179)
	at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:62)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:119)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

This is for a project created from a clean SVN checkout using Build #7821.
I imported the Maven project (composite of 3 projects + parent project).
Worked with the project then exited IntelliJ.
Then next time I started up IntelliJ a stack trace happened !
I filed a bug report then shutdown.
I then tried cleaning the system/cache,jar.compiler etc... files out. to try and fix the problem.
When I started up I received *this exception*,which may be teh same as the original exception.


Environment: Vista, JDK 1.6.0_5, 4GB RAM:

• Xms64m
  
• Xmx512m
  
• XX:MaxPermSize=120m
  
• XX:+UseConcMarkSweepGC -XX:+UseParNewGC
  
• ea
  
• agentlib:yjpagent=disablej2ee,sessionname=IntelliJIDEA

Issue was closed