Thread problem with GRWS queries

We came across some problems when issuing GRWS queries with multiple threads. Some thread gets no input for the stations they query about, while the input for these stations are actually available when only one thread is used. Paul explained that this is because of current problems with the GRWS services about threading support. When a thread queries after another one, but the query time is nearly the same, the late thread may get no input.

To solve this problem we temporarily use only one thread, which just runs for less than an hour to do evaluations for all stations, and which is acceptable. Paul will try to improve the threading support of their services. He also mentioned that we can query input for all stations at one time, and get the result in one single file. This will be very helpful to improve the performance of the daily RDAHMM service, and we'll try it later.