Bad request when updating Appengine with mvn appengine:update

Question

i\'m getting the following error, when I try to update a appengine-application with the appengine-maven-plugin:

400 Bad Request
Error when loading application co         


        

Answer 1

If you generated the project with the archetype skeleton, like I did, and you have a block similar to

    MY-GAE-PROJECT-ID
    1
    1.9.20
    0.9.58.v20150505
    UTF-8

in your pom.xml and your appengine-web.xml looked like

${app.id}
1
etc....

when it got made, then, modify appengine-web.xml to be ${app.version} because they so helpfully already added that property with the archetype but never used it anywhere. Then, update your pom.xml's app.version to be your appropriate version (if you don't use "1"). Then, scroll down in the pom.xml to where you see

            com.google.appengine
            appengine-maven-plugin
            ${appengine.version}
            
                false

and inside the configuration block there add

                ${app.version}