I have been running some basic HTML parsing queries using YQL for many months now during a dev project.  However, at seemingly random times throughout the day or evening, YQL will not return anything when calling the query from my mobile app.  It will work fine 10 - 15 times in a row, then all of the sudden it won't work many times in a row, or for a period of 15 - 30 mins - even when it works in the YQL console, and the HTML web site is up.  There is no way that I could be approaching the limits and I am not changing anything in my code around this.

I really need to be confident that it can be depended upon.  Any thoughts or suggestions on this?

I e-mailed YQL support several days ago and haven't received a response.

Thank you.