Does JSP support multi-threading?
JSP documents are ultimately compiled to servlets, which are multi-threaded by default and are assumed to be thread-safe. If the code in your JSP is not thread-safe, you can request the container uses a single threaded execution of the resulting servlet using the page directive <%@ page isThreadSafe="false" %>. In this case the container may create multiple instances of the JSP servlet to handle concurrent requests or use synchronization to control access to a single instance. Both approaches are likely to reduce the performance of the page because of the overheads of instantiation and locking respectively, so this directive should be used with caution. Actions: Follow-up, clarify or correct this answer. Submit a new question.
