Migrating from Endpoints v1 to v2 for AppEngine

Paul Mazzuca

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Feb 20, 2017, 9:22:49 PM2/20/17

to Google App Engine

In trying to migrate to Endpoints V2 for GAE, I have been unable to get the example located at java-docs-samples/appengine/endpoints-frameworks-v2/backend (git clone https://github.com/GoogleCloudPlatform/java-docs-samples) to work. Does anyone know where the documentation for localhost testing is? Has anyone gotten this example to work locally? The README does include instructions as to how to deploy the project, but nothing on how to test locally.

The process that I have used thus far is:

1. mvn exec:java -DGetSwaggerDoc

2. mvn appengine:run

Then to test:

curl \

-H "Content-Type: application/json" \

-X POST \

-d '{"message":"echo"}' \

http://localhost:8080/_ah/api/echo/v1/echo

The response is a 404.

Les Vogel

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Feb 21, 2017, 2:59:53 PM2/21/17

to google-a...@googlegroups.com, Frank Natividad

+frank

Frank - could you reply to this?

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Paul Mazzuca

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Feb 21, 2017, 4:51:47 PM2/21/17

to Google App Engine

After doing a gcloud update, and mvn clean package, and running mvn appengine:run with Java 7, I receive the following error in the client response to the curl request:

<html>

<head>

<title>Error 500 usingExperimentalRuntime</title>

</head>

<body><h2>HTTP ERROR 500</h2>

<p>Problem accessing /_ah/api/echo/v1/echo. Reason:

<pre> usingExperimentalRuntime</pre></p><h3>Caused by:</h3><pre>java.lang.NoSuchFieldError: usingExperimentalRuntime

at com.google.appengine.api.urlfetch.URLFetchServicePb$URLFetchRequest.writeTo(URLFetchServicePb.java:1928)

at com.google.appengine.repackaged.com.google.protobuf.AbstractMessageLite.toByteArray(AbstractMessageLite.java:41)

at com.google.appengine.api.urlfetch.URLFetchServiceImpl.fetch(URLFetchServiceImpl.java:40)

at com.google.api.client.extensions.appengine.http.UrlFetchRequest.execute(UrlFetchRequest.java:74)

at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:972)

at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:419)

at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:352)

at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:469)

at com.google.api.control.Client.check(Client.java:188)

at com.google.api.control.ControlFilter.doFilter(ControlFilter.java:249)