I am new to developer.yahoo and tried to fetch some QA pairs.

I suddenly received an error 999 when I perform java crawler to send request to the URL http://answers.yahooapis.com/AnswersService/V1/getQuestion****

I am sure I haven't go beyond the daily or hour limit since the total request I execute per hour is no more than 10,000 while total in a day is less than 50,000.

I also have created a project and append my project name and YQL sentences after the URL above to maintain a relax limit.

And about half a day after the error posts, I tried to connect the host again but still failed. Similar case in YQL console now.

Why I could receive this kind of error and how to solve this problem. Thanks a lot.