Re: Eclipse failed to launch an app [was Re: New error about er.javamail ..]
Re: Eclipse failed to launch an app [was Re: New error about er.javamail ..]
- Subject: Re: Eclipse failed to launch an app [was Re: New error about er.javamail ..]
- From: Mark Ritchie <email@hidden>
- Date: Mon, 22 Nov 2010 10:00:02 -0500
- Sun-java-system-smtp-warning: Lines longer than SMTP allows found and wrapped.
On 22/Nov/2010, at 9:42 AM, James Cicenia wrote:
> How did you debug the conflict with language extensions? Where did you see that?
Well, I worked for 1 day messing about with svn versions of the code base and was able to isolate the check in which broke Eclipse. However I was unable to figure out why it would not compile. For me, the symptom was an Eclipse internal null pointer exception on a Java file which would otherwise compile using a command line ant build. When that file was removed from the build, another file showed the same null pointer exception when the incremental builder ran. I gave up at this point in less then mild frustration. A colleague of mine looked at it and noticed that whenever the eclipse hit the internal exception, the first java file in the project was blamed for the problem. Using a combination of google foo and eclipse debugging skills, he determined that it was a bug with the Eclipse implementation of annotations that was masking the real problem. He removed all annotations from all new java files and was then able to see the real problem, a classpath was out of date. Once the classpath was fixed, the annotations could be put back and Eclipse was working again. 2 days lost but at least we were back in business. This was a very specific problem and I certainly hope that you are not facing something this nasty. ;-) One thing was clear though, more then one developer's installation of Eclipse (similar version, similar configuration) would break the same way. That at least let me know early on that it was not the configuration of a single machine which was causing the problem. YMMV.
Good luck!
M.
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