How do I deploy Scala PlayFramework Project to IBM Bluemix

Question

I've build a RESTFul Service with Play 2.4 Scala2.11, now I want to deploy this to IBM Bluemix.

play2-war-plugin was used to package the project to a war package since Bluemix use Liberty as container.

But when I pushed the war package to Bluemix, I got error logs

[ERROR ] SRVE0918E: The attempted blocking write is not allowed because the non-blocking I/O has already been started by the application registering the WriteListener [play.core.server.servlet31.Play2Servlet31RequestHandler$ResultWriteListener@d2487ee8].

I was wondering if there are some better ways to package Play project to a war package.

Can I deploy Scala based PlayFramework project to IBM Bluemix. What are the possible steps I can take to confirm whether this ERROR caused by my codes or caused by the play2-war-plugin? Anyone know how to resolve all the query.

Thanks.

Answer 1

First of all, you don't have the need to package your Play Framework application in a war file if you want to deploy it to Bluemix.

Just build your application using play dist or activator dist and then use the java_buildpack to deploy it. For example:

$ cf push play-application -p target/universal/play-application-1.0-SNAPSHOT.zip -b java_buildpack

You can find Java buildpack documentation for Play Framework here:

https://github.com/cloudfoundry/java-buildpack/blob/master/docs/example-play_framework.md

I hope that this will resolve your query.

Answer 2

Follow these steps:

1. Use a play template to create a Scala play application.
2. Implement the REST interface using a Play controller.
3. Deploy the application on IBM Bluemix.
4. Access the REST interface using a browser.

Answer 3

It seems that they are more than one application deployed in the container.
One application is the play app, using async IO, and the other app is using blocking IO.