1. A server system configured to respond to client requests using stream processing, comprising: at least one hardware processor configured to perform the following executable operations: assigning, responsive to a client request, a processing thread for handling the client request; sending, responsive to the client request and to a stream server configured to interact with a plurality of stream processing nodes, a server request; maintaining, in an idle state, the processing thread pending a write response message from the stream server; returning, to an active state, the processing thread responsive to receiving the write response message including a stream processing result from the stream server; and sending a client response including the stream processing result to the client.