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Editorial Team
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Asked: 2026-06-12T15:39:01+00:00

I use GWT and a lot of classes from apache commons in a project.

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I use GWT and a lot of classes from apache commons in a project. After changing ant to maven the conflicts with apache commons and gwt-dev appeared. Without gwt-dev lib dependency (but with manual set to classpath in order to use GWT Dev Mode) the following errors appear:

[ERROR] /project/branches/maven/server/project-server/target/generated-sources/gwt/com/project/client/Service_TypeSerializer.java:[20,3] cannot find symbol

[ERROR] symbol : class GwtScriptOnly

[ERROR] location: class com.project.client.Service_TypeSerializer

There are no /gwt/com/project/client folders in /project/branches/maven/server/project-server/target/generated-sources/.

With gwt-dev dependencies project doesn’t build at all.

Are there any solution on how to resolve apache commons and gwt conflicts?

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1 Answer

  1. Editorial Team

    This is a known issue, but actually I believe you should put your client and server code in separate Maven modules.
    It’s cleaner: separation of concerns, also separates client dependencies from server dependencies –which would fix your issue–, and doesn’t unnecessarily package your client classes into the WEB-INF/classes.

    Have a look at https://github.com/tbroyer/gwt-maven-archetypes for one way to do it (see also the announcement which has a bit of background).

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