NullPointerException at javax.swing.ToolTipManager.initiateToolTip

[pmouawad]

Describe the bug

Getting stacktrace in logs

2020-09-15 09:40:28,430 ERROR o.a.j.JMeter: Uncaught exception in thread Thread[AWT-EventQueue-0,6,main]
java.lang.NullPointerException: null
at javax.swing.ToolTipManager.initiateToolTip(ToolTipManager.java:478) ~[?:1.8.0_212]
at javax.swing.ToolTipManager.mouseEntered(ToolTipManager.java:435) ~[?:1.8.0_212]
at java.awt.AWTEventMulticaster.mouseEntered(AWTEventMulticaster.java:300) ~[?:1.8.0_212]
at java.awt.AWTEventMulticaster.mouseEntered(AWTEventMulticaster.java:299) ~[?:1.8.0_212]
at java.awt.AWTEventMulticaster.mouseEntered(AWTEventMulticaster.java:299) ~[?:1.8.0_212]
at java.awt.AWTEventMulticaster.mouseEntered(AWTEventMulticaster.java:299) ~[?:1.8.0_212]
at java.awt.AWTEventMulticaster.mouseEntered(AWTEventMulticaster.java:299) ~[?:1.8.0_212]
at java.awt.AWTEventMulticaster.mouseEntered(AWTEventMulticaster.java:299) ~[?:1.8.0_212]
at java.awt.AWTEventMulticaster.mouseEntered(AWTEventMulticaster.java:299) ~[?:1.8.0_212]
at java.awt.AWTEventMulticaster.mouseEntered(AWTEventMulticaster.java:299) ~[?:1.8.0_212]
at java.awt.AWTEventMulticaster.mouseEntered(AWTEventMulticaster.java:299) ~[?:1.8.0_212]
at java.awt.AWTEventMulticaster.mouseEntered(AWTEventMulticaster.java:299) ~[?:1.8.0_212]
at java.awt.Component.processMouseEvent(Component.java:6548) ~[?:1.8.0_212]
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324) ~[?:1.8.0_212]
at java.awt.Component.processEvent(Component.java:6304) ~[?:1.8.0_212]
at java.awt.Container.processEvent(Container.java:2239) ~[?:1.8.0_212]
at java.awt.Component.dispatchEventImpl(Component.java:4889) ~[?:1.8.0_212]
at java.awt.Container.dispatchEventImpl(Container.java:2297) ~[?:1.8.0_212]
at java.awt.Component.dispatchEvent(Component.java:4711) ~[?:1.8.0_212]
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904) ~[?:1.8.0_212]
at java.awt.LightweightDispatcher.retargetMouseEnterExit(Container.java:4686) ~[?:1.8.0_212]
at java.awt.LightweightDispatcher.trackMouseEnterExit(Container.java:4664) ~[?:1.8.0_212]
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4515) ~[?:1.8.0_212]
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476) ~[?:1.8.0_212]
at java.awt.Container.dispatchEventImpl(Container.java:2283) ~[?:1.8.0_212]
at java.awt.Window.dispatchEventImpl(Window.java:2746) ~[?:1.8.0_212]
at java.awt.Component.dispatchEvent(Component.java:4711) ~[?:1.8.0_212]
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760) ~[?:1.8.0_212]
at java.awt.EventQueue.access$500(EventQueue.java:97) ~[?:1.8.0_212]
at java.awt.EventQueue$3.run(EventQueue.java:709) ~[?:1.8.0_212]
at java.awt.EventQueue$3.run(EventQueue.java:703) ~[?:1.8.0_212]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_212]
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74) ~[?:1.8.0_212]
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84) ~[?:1.8.0_212]
at java.awt.EventQueue$4.run(EventQueue.java:733) ~[?:1.8.0_212]
at java.awt.EventQueue$4.run(EventQueue.java:731) ~[?:1.8.0_212]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_212]
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74) ~[?:1.8.0_212]
at java.awt.EventQueue.dispatchEvent(EventQueue.java:730) ~[?:1.8.0_212]
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205) [?:1.8.0_212]
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) [?:1.8.0_212]
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) [?:1.8.0_212]
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) [?:1.8.0_212]
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) [?:1.8.0_212]
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82) [?:1.8.0_212]

To Reproduce

No reproducer

Screenshots

No visible impact

Additional Information:

• OS: macOS & Windows
• OS Version: Windows 10
  • For issues with frame decorations on Windows please provide the explicit Windows build number.
• Darklaf Version: latest.integration and latest version

[weisJ]

Hi @pmouawa,
is this related to #183?

[pmouawad]

Hi @weisJ ,
The #183 was supposed to be fixed.
This one is happening in latest version of Darklaf.

Thanks

[weisJ]

Which component of JMeter is affected? From the stacktrace alone I can't make out what is causing the tooltip text to be null.

This is a result of JDK-6219960 as previously stated in #183. In JDK8 returning null from JComponent#getTooltipText(MouseEvent) is actually not well defined because the TooltipManager assumes that it will always return a non-null value. This is because it thinks its only installed on a component if JComponent#setTooltipText(String) was called with a non-null value (Which obviously isn't the use case of JMeter). Again I would suggest to return an empty string instead as it has the same effect and complies with the assumptions of JDK TooltipManager.

[weisJ]

@pmouawad did apache/jmeter#621 solve the issue for you?

[pmouawad]

Hello @weisJ ,
Yes it solved it.
Thanks