TimeoutException: Futures timed out after [0 milliseconds] using onReady Chunks.out

Play Framework
1

I want to use an object Result that return a chunk. But when I’m using the example of Play User Guide in my Get Request :

Chunks<String> chunks = new StringChunks() {

    // Called when the stream is ready
    public void onReady(Chunks.Out<String> out) {
        out.write("kiki");
        out.write("foo");
        out.write("bar");
        out.close();
    }

};
return ok(chunks);

I see in my log this error:

Execution exception[[TimeoutException: Futures timed out after [0 milliseconds]]]"

I do not figure out why the timeout is 0 and where is set and how can avoid this mistake. Can anyone help me?