When trying to publish a collection from AEM Mobile portal (aemmobile.adobe.com/index.html), an error shows up after sometime saying: The publication is currently locked. Please try again later.
AEM Mobile on-demand services portal (http://aemmobile.adobe.com/signin/index.html).
There are some automated background processes which are taking longer than expected, or have stalled.
The problem typically resolves itself by waiting for background processes to complete. The time needed depends on the number of processes that are running. For example, initiating the publishing of 1000 articles takes 10x as long as 100 articles.