Quickstart for Cloud Endpoints Frameworks on App Engine is not working

[mouli1382]

In which file did you encounter the issue?

Could not run the endpoints framework quick start
https://cloud.google.com/endpoints/docs/frameworks/java/quickstart-frameworks-java

I have tried with maven 3.0 as well as 3.3.9 as there was a log pointing to the minimum version of maven but the issue still persists.

Apache Maven 3.0 (r1004208; 2010-10-04 17:20:56+0530)
Java version: 1.8.0_66
Java home: /Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "mac os x" version: "10.12.3" arch: "x86_64" Family: "mac"

Did you change the file? If so, how?

No.

Describe the issue

Not able to generate openApi config spec using
mvn exec:java -DGetSwaggerDoc

[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.4.0:java (default-cli) on project echo: An exception occured while executing the Java class. null: InvocationTargetException: org/slf4j/helpers/NOPLoggerFactory: org.slf4j.helpers.NOPLoggerFactory -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.4.0:java (default-cli) on project echo: An exception occured while executing the Java class. null
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:203)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:140)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:314)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:151)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:445)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:168)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:132)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.MojoExecutionException: An exception occured while executing the Java class. null
at org.codehaus.mojo.exec.ExecJavaMojo.execute(ExecJavaMojo.java:345)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:107)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:195)
... 19 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:293)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NoClassDefFoundError: org/slf4j/helpers/NOPLoggerFactory
at org.slf4j.impl.StaticLoggerBinder.(StaticLoggerBinder.java:70)
at org.slf4j.impl.StaticLoggerBinder.(StaticLoggerBinder.java:44)
at org.slf4j.LoggerFactory.getSingleton(LoggerFactory.java:189)
at org.slf4j.LoggerFactory.bind(LoggerFactory.java:112)
at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:105)
at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:235)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:208)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:221)
at io.swagger.models.parameters.AbstractSerializableParameter.(AbstractSerializableParameter.java:23)
at com.google.api.server.spi.swagger.SwaggerGenerator.writeApiMethod(SwaggerGenerator.java:234)
at com.google.api.server.spi.swagger.SwaggerGenerator.writeApiClass(SwaggerGenerator.java:216)
at com.google.api.server.spi.swagger.SwaggerGenerator.writeApi(SwaggerGenerator.java:199)
at com.google.api.server.spi.swagger.SwaggerGenerator.writeSwagger(SwaggerGenerator.java:179)
at com.google.api.server.spi.swagger.SwaggerGenerator.writeSwagger(SwaggerGenerator.java:158)
at com.google.api.server.spi.tools.GetOpenApiDocAction.genOpenApiDoc(GetOpenApiDocAction.java:123)
at com.google.api.server.spi.tools.GetOpenApiDocAction.execute(GetOpenApiDocAction.java:82)
at com.google.api.server.spi.tools.EndpointsTool.execute(EndpointsTool.java:84)
at com.google.api.server.spi.tools.EndpointsTool.main(EndpointsTool.java:116)
... 6 more
Caused by: java.lang.ClassNotFoundException: org.slf4j.helpers.NOPLoggerFactory
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 24 more
[ERROR]
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

[frankyn]

Hi @mouli1382 ,

Thanks for raising this issue.

There's a PR in review that will help resolve this issue.

For now you can modify the pom.xml by changing endpoints-framework-all to endpoints-framework on Line: 53.

[mouli1382]

Thanks @frankyn. I could test the API when deployed to app engine but facing some issues with locally running server.

[INFO] GCLOUD: INFO 2017-02-22 09:03:17,301 api_server.py:268] Starting API server at: http://localhost:52862
[INFO] GCLOUD: INFO 2017-02-22 09:03:17,311 dispatcher.py:199] Starting module "default" running at: http://localhost:8080
[INFO] GCLOUD: INFO 2017-02-22 09:03:17,313 admin_server.py:116] Starting admin server at: http://localhost:8000

curl -H "Content-Type: application/json" -X POST -d '{"message":"echo"}' http://localhost:52862/_ah/api/echo/v1/echo

Tcexceptions
[INFO] GCLOUD: File "../Downloads/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/api_server.py", line 301, in _handle_POST
[INFO] GCLOUD: request.ParseFromString(wsgi_input)
[INFO] GCLOUD: File "../Downloads/google-cloud-sdk/platform/google_appengine/google/net/proto/ProtocolBuffer.py", line 140, in ParseFromString
[INFO] GCLOUD: self.MergeFromString(s)
[INFO] GCLOUD: File "../Downloads/google-cloud-sdk/platform/google_appengine/google/net/proto/ProtocolBuffer.py", line 152, in MergeFromString
[INFO] GCLOUD: self.MergePartialFromString(s)
[INFO] GCLOUD: File "../Downloads/google-cloud-sdk/platform/google_appengine/google/net/proto/ProtocolBuffer.py", line 168, in MergePartialFromString
[INFO] GCLOUD: self.TryMerge(d)
[INFO] GCLOUD: File "../Downloads/google-cloud-sdk/platform/google_appengine/google/appengine/ext/remote_api/remote_api_pb.py", line 210, in TryMerge
[INFO] GCLOUD: d.skipData(tt)
[INFO] GCLOUD: File "../Downloads/google-cloud-sdk/platform/google_appengine/google/net/proto/ProtocolBuffer.py", line 669, in skipData
[INFO] GCLOUD: self.skipData(t)
[INFO] GCLOUD: File "../Downloads/google-cloud-sdk/platform/google_appengine/google/net/proto/ProtocolBuffer.py", line 662, in skipData
[INFO] GCLOUD: self.skip(n)
[INFO] GCLOUD: File "../Downloads/google-cloud-sdk/platform/google_appengine/google/net/proto/ProtocolBuffer.py", line 650, in skip
[INFO] GCLOUD: if self.idx + n > self.limit: raise ProtocolBufferDecodeError, "truncated"
[INFO] GCLOUD: ProtocolBufferDecodeError: truncated

Could you help me fix this?

[frankyn]

I'm still looking into this, and you may wish to try the following. Let me know how it works. I'll reply here as soon as I find a better answer.

1. git pull # the PR was merged from my first response.
2. In pom.xml substitute YOUR_PROJECT_ID for your Google Cloud Platform project id
3. mvn exec:java -DGetSwaggerDoc
4. gcloud service-management deploy openapi.json
5. mvn appengine:run
6. curl -X POST -H "Content-Type: application/json" -d '{"message":"echo"}' \
   http://localhost:8080/_ah/api/echo/v1/echo

[lukegeor]

Hi,

I see the original author didn't reply, but I'm seeing the same problem he saw when running locally. I'm on Windows 10, and I ran through the quickstart, which has the exact same steps you listed in your last comment except for the curl command. Question, though. Are you supposed to connect to port 8080, or the port that's listed in your console as the API server? I've tried both. The API server port responds with the protobuf error, and port 8080 responds with a 500 error and "bad runtime process port['']"

Thanks.

[frankyn]

Hi @lukegeor,

The sample should be using port 8080 for local tests. I have a few follow up questions.

1. Which version of the Cloud SDK are you using? gcloud -v.

• You can update the Cloud SDK using gcloud components update

2. Did you recently clone this repository? We update dependencies often.
3. Could you add the console output containing the error?
4. Can you add the pom.xml you're using?

Thank you!

[lukegeor]

Thanks for the response, Frank. I'm going to try one more time. I do notice, however, that the line in the quickstart that says: export ENDPOINTS_SERVICE_NAME=echo-api-flex.endpoints.[YOUR_PROJECT_ID].cloud.goog should not have the "-flex" in it as the service name that gets deployed is named echo-api.endpoints.[YOUR_PROJECT_ID].cloud.goog. I'm going to change this when I try again.

…

On Wed, Mar 22, 2017 at 10:20 AM, Frank Natividad ***@***.***> wrote: Reopened #533 <#533>. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#533 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AHqLfkQO9t8XU7-sBUAJSUKJpHYS6J4Eks5roVh6gaJpZM4MIRaC> .

[lukegeor]

Also, you need to make sure to have users install the app-engine-python and app-engine-java components.

…

On Wed, Mar 22, 2017 at 2:02 PM, Luke Georgalas ***@***.***> wrote: Thanks for the response, Frank. I'm going to try one more time. I do notice, however, that the line in the quickstart that says: export ENDPOINTS_SERVICE_NAME=echo-api-flex.endpoints.[YOUR_PROJECT_ID].cloud.goog should not have the "-flex" in it as the service name that gets deployed is named echo-api.endpoints.[YOUR_PROJECT_ID].cloud.goog. I'm going to change this when I try again. On Wed, Mar 22, 2017 at 10:20 AM, Frank Natividad < ***@***.***> wrote: > Reopened #533 > <#533>. > > — > You are receiving this because you were mentioned. > Reply to this email directly, view it on GitHub > <#533 (comment)>, > or mute the thread > <https://github.com/notifications/unsubscribe-auth/AHqLfkQO9t8XU7-sBUAJSUKJpHYS6J4Eks5roVh6gaJpZM4MIRaC> > . >

[frankyn]

Thanks for your feedback, @lukegeor ! Please keep me posted.

[lukegeor]

Frank, After re-running through the quickstart, I'm still having trouble. Last time, even if everything was working properly, I was connecting to the wrong port. Now, I'm connecting to port 8080. When running my curl command (which I've pasted below), I get a 503 error (timeout). curl -H "Content-Type: application/json" -X POST -d '{"message": "echo1"}' http://localhost:8080/_ah/api/echo/v1/echo The pastebin url below is what I'm seeing on the server. http://pastebin.com/PDGjCysE Starting at line 65, I'm getting an error where it can't get information about the endpoints service. When I run gcloud service-management list, I get the following output: <my username>@dev:~/java-docs-samples/appengine/endpoints-frameworks-v2/backend$ gcloud service-management list NAME TITLEbigquery-json.googleapis.com BigQuery APIclouddebugger.googleapis.com Stackdriver Debugger APIdatastore.googleapis.com Google Cloud Datastore APIstorage-component.googleapis.com Google Cloud Storagecontainer.googleapis.com Google Container Engine APIstorage-api.googleapis.com Google Cloud Storage JSON APIdataproc-control.googleapis.com Google Cloud Dataproc Control APIlogging.googleapis.com Stackdriver Logging APIresourceviews.googleapis.com Google Compute Engine Instance Groups APIreplicapool.googleapis.com Google Compute Engine Instance Group Manager APIcloudapis.googleapis.com Google Cloud APIsdeploymentmanager.googleapis.com Google Cloud Deployment Manager V2 APIendpoints.googleapis.com Google Cloud Endpointsmonitoring.googleapis.com Stackdriver Monitoring APIservicecontrol.googleapis.com Google Service Control APIsql-component.googleapis.com Google Cloud SQLcloudtrace.googleapis.com Stackdriver Trace APIdataproc.googleapis.com Google Cloud Dataproc APIservicemanagement.googleapis.com Google Service Management API*echo-api.endpoints.<project id>.cloud.goog echo-api.endpoints.<project id>.cloud.goog*compute-component.googleapis.com Google Compute Engine APIreplicapoolupdater.googleapis.com Google Compute Engine Instance Group Updater API So the endpoints service is definitely registered. I have my cloud sdk set to authenticate using my gmail account, which is the same gmail account I used to set up my project. I do have the ENDPOINTS_SERVICE_NAME environment variable set to the service name above. I can't think of anything else I might be doing wrong. Any ideas? I think the person who wrote the following on stackoverflow is having the same problem. http://stackoverflow.com/questions/42421042/com-google-api-config-serviceconfigsupplier-failed-to-fetch-default-config-ver Thanks, Luke

…

On Wed, Mar 22, 2017 at 2:32 PM, Frank Natividad ***@***.***> wrote: Thanks for your feedback, @lukegeor <https://github.com/lukegeor> ! Please keep me posted. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#533 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AHqLflxbWOyVnMj_trL_7_lggIFFkx2Eks5roZNUgaJpZM4MIRaC> .

[frankyn]

Luke,

Thanks for bringing up the stackoverflow question. I'll make sure to Can you send me your current pom.xml? Have you updated the gcloud tool, I wasn't sure if you did.

The extra -flex was fixed yesterday, thanks for pointing that out.

Thanks!

[lukegeor]

Yes, I have the latest gcloud tool. Google Cloud SDK 148.0.0 app-engine-java 1.9.50 app-engine-python 1.9.50 bq 2.0.24 bq-nix 2.0.24 core 2017.03.17 core-nix 2016.11.07 gcloud gcloud-deps 2017.03.17 gcloud-deps-linux-x86_64 2017.02.21 gsutil 4.23 gsutil-nix 4.18 Thanks, Luke

…

On Thu, Mar 23, 2017 at 4:49 PM, Frank Natividad ***@***.***> wrote: Luke, Thanks for bringing up the stackoverflow question. I'll make sure to Can you send me your current pom.xml? Have you updated the gcloud tool, I wasn't sure if you did. The extra -flex was fixed yesterday, thanks for pointing that out. Thanks! — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#533 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AHqLfnlpFoPrz0g-fRwTMu1xTDfBJV9bks5rowUDgaJpZM4MIRaC> .

[frankyn]

Could you add your Maven pom.xml? Unless it's the exact same version we currently have.