I am executing the bluelist-push demo following this tutorial:
http://www.ibm.com/developerworks/library/mo-android-push-app/index.html
Everything is working fine except that the other devices are not getting notified if list changes in one device.
Following is the error in logcat:
09-01 18:39:10.415 17896-18359/com.ibm.bluelist I/MainActivity﹕ Response Body: Cannot POST /eta-chat/v1/apps/3ab78df7-3b35-402e-b45e-2fccf39ad3bc/notifyOtherDevices
09-01 18:39:10.416 17896-18359/com.ibm.bluelist I/MainActivity﹕ Response Status from notifyOtherDevices: 404
My app is running at: http://eta-chat.mybluemix.net/
The request is 404ing when attempting to send the POST request to your Node.js app. Most likely because the endpoint does not exist.
Please ensure you have configured your app.js to include your appID and appRoute along with the notifyOtherDevices endpoint implementation.
Once you have confirmed the above, cf push the app to your Bluemix runtime and you should not run into this problem anymore.
Lastly make sure you have registered a device to the Push service. Attempting to notify an empty list of devices may cause a 404 as well.