title: Maven App Engine DevServer: java.util.zip.ZipException: error in opening zip file
body: <p>I'm trying to run <code>mvn appengine:run</code> goal from <a href="https://cloud.google.com/appengine/docs/standard/java/tools/using-maven" rel="nofollow noreferrer">Maven App Engine Plugin Google Cloud SDK based</a>. When the App Engine Server (DevServer) starts, I notice the error:</p>
  <pre><code>ebAppContext:main: Failed startup of context c.g.a.t.d.j.DevAppEngineWebAppContext@4b14c583{/,file:///path/to/my/project/target/Project-1.0-SNAPSHOT/,null}
  </code></pre>
  <p>The error is caused by: <code>[INFO] GCLOUD: java.util.zip.ZipException: error in opening zip file</code>.</p>
  <p>What is the cause of <code>java.util.zip.ZipException</code> at this context?
  Thanks!</p>