title: How to deploy my code to App Engine behind proxy
body: <p>I am using Eclipse Neon 6.4.3 and i am trying to deploy my project to App Engine using the Google Cloud Platform plugin for Eclipse. <a href="https://cloud.google.com/eclipse/docs/quickstart" rel="nofollow noreferrer">https://cloud.google.com/eclipse/docs/quickstart</a></p>
  
  <p>Until the 1st of April i could deploy projects using this plugin. But after that date, i get the following error:</p>
  
  <blockquote>
    <p>Failed to retrieve projects; An error occurred while retrieving projects:javax.net.ssl.SSLHandshakeException:  sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuiderException: unable to find valid certification path to requested target.</p>
    
    <p>Reason:  Failed to retrieve projects.</p>
    
    <p>Details:  Failed to retrieve projects<br>
    javax.net.ssl.SSLHandshakeException:<br>
    sun.security.validator.ValidatorException: PKIX path building failed:
    sun.security.provider.certpath.SunCertPathBuilderException: unable to
    find valid certification path to requested target</p>
  </blockquote>
  
  <p>After I press OK, I get the same message again. Then I get the "Deploy to App Engine Standard" menu with my account but my project list is blank. </p>
  
  <p>I am working in a company that uses proxies and it's doing a SSL Inspection. I imported these 2 certificates used for SSL Inspection in my Eclipse cacerts file but i get the same error. These two certificates are issued by our internal certificate authority. </p>