When writing a test case with ServerRule or ServerExtension, a user sometimes wants to capture the ServiceRequestContexts:

class MyJUnit5Test {
  static final var serviceContexts =
      new LinkedBlockingQueue<ServiceRequestContext>();

  @RegisterExtension
  static final var server = new ServerExtension() {
    @Override
    protected void configure(ServerBuilder sb) thr

Is your feature request related to a problem? Please describe.

As observed during #261, users can accidentally set timeouts inconsistently. A concrete example is that one can set a User facing timeout lower than any backend timeout, such that requests may fail early.

Describe the solution you'd like

We should provide some sanity checking to prevent unintended timeout behavior.

I have encountered the scenario that federated services may not be up yet when the gateway has initialized. In this case, the gateway will not retry polling those services in question. It's a different behavior as opposed to when everything (all services, the gateway) is up and running and, say, one of the federated services goes down. In this case, the gateway will retry polling that service acco

Is there a plan to build kernelspec with pytorch support? If not, what's the right way to contribute?
The contribution instruction page seems to be not available: https://jupyter.readthedocs.io/en/latest/contributor/content-contributor.html