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Created attachment 102462 [details] stack traces from dump during hang Build ID: M20080221-1800 Steps To Reproduce: 1. Load up a very large workspace with autobuild off 2. Launch an ANT task. 3. Notice it's building before launching 4. Open the external tools launch config dialog. 5. The UI hangs until the build is complete. I will attach a dump of the active stack traces. More information:
It looks like LaunchConfigurationWorkingCopy is attempting to write a file in the "main" thread while the lock on the resources is taken by the Java builder. Moving to Platform/Debug
*** This bug has been marked as a duplicate of bug 230403 ***