podTemplate(label: 'test-example-build', containers: [
        containerTemplate(name: 'protobuf', image: 'nanoservice/protobuf', command: 'sleep 3600'),
        containerTemplate(name: 'jnlp', image: 'jenkinsci/jnlp-slave', args: '${computer.jnlpmac} ${computer.name}'),
]) {
    node('test-example-build') {
        stage('checkout') {
            checkout scm
        }

        container('protobuf') {
            stage('build') {
                sh "./gradlew assemble --continue"
            }
        }
    }
}

[Pipeline] container
[Pipeline] {
[Pipeline] stage
[Pipeline] { (build)

[Pipeline] sh
[test_example_protobuf-4ZLX5YPVONGXNKQ5U6U3PXZSHY5ZOEH767OMBGDGDKUGOHXLRBOA] Running shell script
Executing shell script inside container [protobuf] of pod [kubernetes-bad0aa993add416e80bdc1e66d1b30fc-536045ac8bbe]
java.net.ProtocolException: Expected HTTP 101 response but was '500 Internal Server Error'
	at com.squareup.okhttp.ws.WebSocketCall.createWebSocket(WebSocketCall.java:123)
	at com.squareup.okhttp.ws.WebSocketCall.access$000(WebSocketCall.java:40)
	at com.squareup.okhttp.ws.WebSocketCall$1.onResponse(WebSocketCall.java:98)
	at com.squareup.okhttp.Call$AsyncCall.execute(Call.java:177)
	at com.squareup.okhttp.internal.NamedRunnable.run(NamedRunnable.java:33)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // container