Remote debugging of server side code without blocking or high-level privileges

A server exposes debugger services to a plurality of debugger clients. One or more debugger clients can select a debug operation and establish a debug session in a thread of a server process for debugging user code. A two-way debug communication pipeline can be established between a debugger client and the server using standard encoding protocols and standard network transport protocols. A two-way debug communication pipeline can be established using HTTP where the server can initiate a communication with the debugger client using a long polling technique. When one of the threads of the server process is suspended, the other threads in the server process continue to execute.