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Editorial Team
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Asked: 2026-05-20T15:32:39+00:00

Dunno if this is weird or if I´ve just missunderstood how Eclipse works for

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Dunno if this is weird or if I´ve just missunderstood how Eclipse works for the past five years or so 🙂

I have a Google App engine project, where I´ve put some 3rd party libs in my build path. Whenever I try to run my webapp however, I get a ClassNotFound-exception. I struggled with this for a while, until I eventually just copied my jars directly into the WEB-INF/lib direcory for the project in my workspace. Now everything works like a charm.

I´ve always been under the impression that Eclipse automatically puts my 3rd party libs in the WEB-INF/lib directory whenever I add them to my build path, but that does seem to be the case here. Could this be an issue with the Google App Engine plugin, or have I just missunderstood it all?

Can someone please clarify 🙂

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1 Answer

  1. Editorial Team

    I don’t think the App Engine plugin automatically puts your libs into WEB-INF/lib. It may do that for its own SDK libs, but not for 3rd party stuff. You have to put them there yourself in order for them to be uploaded.

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