Research Academy
My account Customers About Blog Careers Legal Contact Resellers
The Burp Suite User Forum was discontinued on the 1st November 2024.

Burp Suite User Forum

For support requests, go to the Support Center. To discuss with other Burp users, head to our Discord page.

SUPPORT CENTER DISCORD

Cannot close Burp Sequencer [manual load analysis] window

Paul | Last updated: Jun 25, 2021 02:58AM UTC

Burp Suite Pro v2021.6.2-8352 (Early Adopter) -- Checking for updates indicates Burp is up to date. I opened a manual load sequencer window to analyze previously collected session tokens. When I attempted to close the window it would not close and I found the following stack trace in the console window: java.lang.NullPointerException: Cannot enter synchronized block because "this.u" is null at burp.dn_.i(Unknown Source) at burp.dn_.c(Unknown Source) at burp.dn_.a(Unknown Source) at burp.dn_.a(Unknown Source) at burp.apo.windowClosing(Unknown Source) at java.desktop/java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:357) at java.desktop/java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:357) at java.desktop/java.awt.Window.processWindowEvent(Window.java:2075) at java.desktop/javax.swing.JFrame.processWindowEvent(JFrame.java:298) at java.desktop/java.awt.Window.processEvent(Window.java:2034) at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4990) at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321) at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2769) at java.desktop/java.awt.Component.dispatchEvent(Component.java:4822) at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:772) at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721) at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715) at java.base/java.security.AccessController.doPrivileged(AccessController.java:391) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95) at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745) at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:743) at java.base/java.security.AccessController.doPrivileged(AccessController.java:391) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85) at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742) at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203) 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)

Ben, PortSwigger Agent | Last updated: Jun 25, 2021 01:32PM UTC

Hi Paul, Thank you for this. I have been able to replicate this issue and have raised a bug report so that our developers can investigate. We will update this forum thread if and when a fix is implemented in a future version of Burp.

Michelle, PortSwigger Agent | Last updated: Jul 23, 2021 01:43PM UTC