Wildfly war deployment fails

[Thomas Schwade]

Hello -

I hope someone with more experience with Wildfly 27 has an idea: The most simple war file (https://tomcat.apache.org/tomcat-7.0-doc/appdev/sample/) fails to deploy in Wildfly 27 with the error

WFLYSRV0021: Deploy of deployment "sample.war" was rolled back with the following failure message:
{"WFLYCTL0080: Failed services" => {"jboss.deployment.unit.\"sample.war\".undertow-deployment.UndertowDeploymentInfoService" => "Failed to start service
    Caused by: java.lang.NoClassDefFoundError: Failed to link mypackage/Hello (Module \"deployment.sample.war\" from Service Module Loader): javax/servlet/http/HttpServlet"}}

even though the class is definitely available in the package. It seems I am missing something very basic.

Thanks for any hint,
Thomas

[Jean Francois Denise]

Hi,

WildFly 27 supports Jakarta EE 10 version. You are using javax.servlet although you should use jakarta.servlet.

JF

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[Thomas Schwade]

Thanks  for the hint. I changed the web.xml accordingy:

<web-app
        xmlns = "https://jakarta.ee/xml/ns/jakartaee"
        xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation = "https://jakarta.ee/xml/ns/jakartaee https://jakarta.ee/xml/ns/jakartaee/web-app_5_0.xsd"
        version = "5.0"
        metadata-complete = "false"
>

but still receive the same error. Is there some special configuration required for the class loader? The documentation says that all classes in a war file should be loaded without any  special dependency configuration.

Kind regards, Thomas

[Jean Francois Denise]

Hi,

you need to change the java import in the Hello class. You could have a look to the WildFly quickstart: https://github.com/wildfly/quickstart/tree/27.0.1.Final/helloworld

JF

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[Thomas Schwade]

Thanks a lot. I did not realize that even the application code has to be rewritten, if an application is intended to run both in Tomcat and in Wildfly. In former times it was sufficient to add a platform dependent deployment descriptor...

[Paul Ferraro]

This code change issue not unique to WildFly.  Applications migrating from Tomcat 9 -> Tomcat 10 require the same code changes.

This was due to a trademark dispute over the javax package namespace, see: https://eclipse-foundation.blog/2019/05/03/jakarta-ee-java-trademarks/