Vision API broken: Google App Engine does not support Runtime.addShutdownHook

[ramramanathan1]

@apimethod(name = "analyzeImage")
public Message analyzeImage(@nAmed("imgURL") String imgURL) {
try {
GoogleCredential credential = GoogleCredential.getApplicationDefault();

         ImageAnnotatorClient vision = ImageAnnotatorClient.create();

     // Performs label detection on the image file
        BatchAnnotateImagesResponse response = vision.batchAnnotateImages(requests);
        List<AnnotateImageResponse> responses = response.getResponsesList();

        for (AnnotateImageResponse res : responses) {
          if (res.hasError()) {
            System.out.printf("Error: %s\n", res.getError().getMessage());
            return new Message("Something broke");
          }

          for (EntityAnnotation annotation : res.getLabelAnnotationsList()) {
            Map<FieldDescriptor, Object> m = annotation.getAllFields();
            Set<FieldDescriptor> s = m.keySet();
            for(FieldDescriptor key : s){
                System.out.printf("%s : %s\n", key, m.get(key).toString());
            }
          }
        }
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return new Message("Hello:" + imgURL);
  } 

However, the line

ImageAnnotatorClient vision = ImageAnnotatorClient.create();

ends up throwing:
java.lang.SecurityException: Google App Engine does not support Runtime.addShutdownHook
at com.google.appengine.runtime.Request.process-75407a6647252b61(Request.java)
at java.lang.Runtime.addShutdownHook(Runtime.java:45)
at com.google.common.util.concurrent.MoreExecutors$Application.addShutdownHook(MoreExecutors.java:232)
at com.google.common.util.concurrent.MoreExecutors$Application.addDelayedShutdownHook(MoreExecutors.java:204)
at com.google.common.util.concurrent.MoreExecutors$Application.getExitingScheduledExecutorService(MoreExecutors.java:196)
at com.google.common.util.concurrent.MoreExecutors$Application.getExitingScheduledExecutorService(MoreExecutors.java:228)
at com.google.common.util.concurrent.MoreExecutors.getExitingScheduledExecutorService(MoreExecutors.java:176)
at com.google.api.gax.grpc.InstantiatingExecutorProvider.getExecutor(InstantiatingExecutorProvider.java:51)
at com.google.api.gax.grpc.ChannelAndExecutor.create(ChannelAndExecutor.java:62)
at com.google.api.gax.grpc.ClientSettings.getChannelAndExecutor(ClientSettings.java:81)
at com.google.cloud.vision.spi.v1.ImageAnnotatorClient.(ImageAnnotatorClient.java:120)
at com.google.cloud.vision.spi.v1.ImageAnnotatorClient.create(ImageAnnotatorClient.java:111)
at com.google.cloud.vision.spi.v1.ImageAnnotatorClient.create(ImageAnnotatorClient.java:102)
at photography.viks.ig.api.InstaSmartSvc.analyzeImage(InstaSmartSvc.java:93)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:42)
at com.google.api.server.spi.SystemService.invokeServiceMethod(SystemService.java:351)
at com.google.api.server.spi.handlers.EndpointsMethodHandler$RestHandler.handle(EndpointsMethodHandler.java:114)
at com.google.api.server.spi.handlers.EndpointsMethodHandler$RestHandler.handle(EndpointsMethodHandler.java:102)
at com.google.api.server.spi.dispatcher.PathDispatcher.dispatch(PathDispatcher.java:49)
at com.google.api.server.spi.EndpointsServlet.service(EndpointsServlet.java:71)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.api.control.ControlFilter.doFilter(ControlFilter.java:220)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.api.control.ConfigFilter.doFilter(ConfigFilter.java:120)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)

[garrettjonesgoogle]

Development since this issue was filed: Java 8 on App Engine Standard will support gRPC, so Vision should work in that environment. Unfortunately, it won't work on Java 7 and there are no plans to support that. The work to get open issues fixed for Java 8 on App Engine Standard is being tracked in #1918 . I am going to close out the present issue - follow along in #1918 for progress.