This Bugzilla instance is a read-only archive of historic NetBeans bug reports. To report a bug in NetBeans please follow the project's instructions for reporting issues.
Steps to reproduce: Open http://java.sun.com/xml/ns/javacard/applet-app_3_0.xsd in a browser In a NB module project, Go to New File > Other > Empty File and make the filename applet-app_3_0.xsd Copy the content from the browser into the file Immediately right click and select validate XML IDE hangs The culprit is a RequestProcessor thread manipulating the AWT hierarchy. This work needs to be done in the AWT thread. at java.awt.Container.addImpl(Container.java:1039) - locked <0x1c88a700> (a java.awt.Component$AWTTreeLock) at java.awt.Container.add(Container.java:896) at org.netbeans.modules.xml.schema.multiview.SchemaColumnViewMultiViewElement.recreateUI(Sch emaColumnViewMultiViewElement.java:357) See attached thread dump.
Created attachment 77386 [details] Thread dump
There is the issue #160206, which has the same deadlock in thread dump. The scenarios are a bit different, but I'm sure it is the same deadlock. I tried reproduce it, but failed. So I'm going to close it like duplicate. *** This issue has been marked as a duplicate of 160206 ***
Honestly, I wasn't able to reproduce the deadlock in trunk when I was fixing the 160206. So I suppose here can be mistake with NetBeans version. It is set to 6.7. See my comments in the issue #160206.