How do Servlets handle concurrent HTTP requests?

        As Servlets support multi-threading by default, so whenever an HTTP client request comes in, the servlet immediately initiates an independent thread to handle the request. This is how a servlet handles all concurrent requests.
       However, if the request count at a given moment exceeds the maximum number of allowed threads per servlet, the server running the servlet can either deny further requests, or start a new instance of the same servlet to handle the extra load - it only depends on the specific settings.