google-app-engine


Google Identiy Toolkit Random OAuth Error


I am successfully implementing Google Identity Toolkit on a Google App Engine Java server using the Google Identity Toolkit Java client.
I would say I have no issues upwards of 99% of the time. On some rare instances however, possibly after rapid successive calls. I get the following error.
com.google.appengine.api.oauth.OAuthRequestException:
java.security.SignatureException: Invalid signature for token: <some-lengthy-token-string-here>
Tec Stack: AngularJS ngResource --> Google Cloud Endpoints (App Engine Java) --> Google Identity Toolkit Java client.
I simply retry the call and no problem, but this still needs to be figured out. I am willing to post more information, but not sure where to start. My best guess is that the service won't authenticate the same token twice in a very short span of time. Anyone with more understanding of how the service works please give me some ideas.

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