[NETBEANS-963] java.lang.AssertionError: Debugger lock taken in AWT Event Queue!

• Type: Bug
• Status: Reopened
• Priority: Critical
• Resolution: Unresolved
• Affects Version/s: 9.0
• Fix Version/s: 9.0
• Component/s: debugger - Java

Environment

Linux; Release Build 316

• Assignee: Unassigned
• Reporter: Peter Nabbefeld
• Created: 16/Jun/18 12:13
• Updated: 08/Jun/20 01:28

Description

When I've selected the "String Value" column in Variables view of the Java debugger, the following exception is thrown even if I just move the cursor over the string value.

This does only happen for object values; primitive values do not seem to be affected.

Probably it's related to tooltips, as those are shown for primitive values, while object values throw an exception.

As this makes it impossible to show and review large strings and thus makes debugging harder, I've set the status to "Blocker".

 

java.lang.AssertionError: Debugger lock taken in AWT Event Queue!
    at org.netbeans.modules.debugger.jpda.JPDADebuggerImpl$DebuggerReentrantReadWriteLock$DebuggerReadLock.lock(JPDADebuggerImpl.java:2675)
    at org.netbeans.modules.debugger.jpda.models.JPDAThreadImpl$ThreadReentrantReadWriteLock$ThreadWriteLock.lock(JPDAThreadImpl.java:2555)
    at org.netbeans.modules.debugger.jpda.JPDADebuggerImpl.invokeMethod(JPDADebuggerImpl.java:1066)
    at org.netbeans.modules.debugger.jpda.JPDADebuggerImpl.invokeMethod(JPDADebuggerImpl.java:1008)
    at org.netbeans.modules.debugger.jpda.models.AbstractObjectVariable.getToStringValue(AbstractObjectVariable.java:496)
    at org.netbeans.modules.debugger.jpda.models.AbstractObjectVariable.getToStringValue(AbstractObjectVariable.java:460)
    at org.netbeans.modules.debugger.jpda.models.AbstractObjectVariable.getToStringValue(AbstractObjectVariable.java:424)
    at org.netbeans.modules.debugger.jpda.ui.models.VariablesTableModel.getValueAt(VariablesTableModel.java:108)
    at org.netbeans.spi.viewmodel.Models$DelegatingTableModel.getValueAt(Models.java:2249)
    at org.netbeans.modules.debugger.jpda.ui.models.NumericDisplayFilter.getValueAt(NumericDisplayFilter.java:112)
    at org.netbeans.spi.viewmodel.Models$CompoundTableModel.getValueAt(Models.java:1439)
    at org.netbeans.modules.debugger.jpda.ui.models.VariablesTreeModelFilter.getValueAt(VariablesTreeModelFilter.java:530)
    at org.netbeans.spi.viewmodel.Models$CompoundTableModel.getValueAt(Models.java:1439)
    at org.netbeans.modules.debugger.jpda.ui.models.PendingActionsFilter.getValueAt(PendingActionsFilter.java:108)
    at org.netbeans.spi.viewmodel.Models$CompoundTableModel.getValueAt(Models.java:1439)
    at org.netbeans.spi.viewmodel.Models$CompoundTableModel.getValueAt(Models.java:1441)
    at org.netbeans.spi.viewmodel.Models$CompoundTableModel.getValueAt(Models.java:1441)
    at org.netbeans.spi.viewmodel.Models$CompoundModel.getValueAt(Models.java:4566)
    at org.netbeans.modules.viewmodel.TreeModelNode$MyProperty.updateShortDescription(TreeModelNode.java:2102)
    at org.netbeans.modules.viewmodel.TreeModelNode$MyProperty.getShortDescription(TreeModelNode.java:2084)
    at org.openide.explorer.view.SheetCell.getTableCellRendererComponent(SheetCell.java:276)
    at org.openide.explorer.view.SheetCell$OutlineSheetCell.getTableCellRendererComponent(SheetCell.java:737)
    at org.netbeans.modules.viewmodel.DelegatingCellRenderer.getTableCellRendererComponent(DelegatingCellRenderer.java:66)
    at java.desktop/javax.swing.JTable.prepareRenderer(JTable.java:5758)
    at org.netbeans.swing.outline.Outline.getToolTipText(Outline.java:393)
    at java.desktop/javax.swing.ToolTipManager$insideTimerAction.actionPerformed(ToolTipManager.java:675)
    at java.desktop/javax.swing.Timer.fireActionPerformed(Timer.java:317)
    at java.desktop/javax.swing.Timer$DoPostEvent.run(Timer.java:249)
    at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
    at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:764)
    at java.desktop/java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:717)
    at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:711)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:89)
    at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:734)
    at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
[catch] at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:199)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

Issue Links

• is related to: NETBEANS-974 Viewing variable in debugger caused AWT Event Queue exception