Describe the bug

Issuing a HTTP GET request on a REST plugin where there are more than 256 local replies to the GET hangs. Local replies are replies that are answered by the local router, typically the local router admin space.

To reproduce

1. Start Zenoh router:
   ./zenohd
2. Start 257 z_queryable examples:
   for i in $(seq 0 256); do ./z_queryable -k test/$i -m client -e tcp/localhost:7447 & sleep 0.1; done
3. Get queryables from admin space through REST:
   curl http://localhost:8000/@/**/queryable/**

System info

• Platform: MacBook Air
• CPU: M2
• Zenoh commit: 869ace6