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After using NB for about 30 minutes. It appears that the IDE has some sort of internal crash that it can't recover from. I have line numbers enabled, and after 30 minutes of normal work, these line numbers disappear and the IDE does not recognize keystrokes like the backspace, delete, and copy/paste stops working. I have to either close out all open files and reopen them, or close the entire application down. This happens with version 6.5 and 6.5.1. I have the full NB package installed with the Python package. I am not sure if it is the IDE itself suffering from a partial crash or if java is crashing. I tried poking around the system logs and I can not find anything help. This issue occurs when it sits idle or while being used. I am willing to supply further information regarding this issue in the hope of discovering the cause of this defect.
Thanks for your report .. please look at your userdir : http://wiki.netbeans.org/FaqWhatIsUserdir and attach messages.log file.
Created attachment 83994 [details] Requested messages.log file
I'm not sure if this is related, but I just noticed this error: java.lang.NullPointerException at com.sun.java.swing.plaf.windows.WindowsTreeUI.ensureRowsAreVisible(WindowsTreeUI.java:74) at javax.swing.plaf.basic.BasicTreeUI.toggleExpandState(BasicTreeUI.java:2213) at javax.swing.plaf.basic.BasicTreeUI.handleExpandControlClick(BasicTreeUI.java:2196) at javax.swing.plaf.basic.BasicTreeUI.checkForClickInExpandControl(BasicTreeUI.java:2154) at javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(BasicTreeUI.java:3508) at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressedDND(BasicTreeUI.java:3494) at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressed(BasicTreeUI.java:3453) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:263) at java.awt.Component.processMouseEvent(Component.java:6038) 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:3983) 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) [catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104) 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)
I'm not sure what's wrong. The log file shows nothing. This could be one of the mysterious focus problems we have been hunting for years now. See for example issue #119617.
*** This issue has been marked as a duplicate of 119617 ***