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[web_server] Double socket allocation to prevent connection exhaustion

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Browsers open multiple concurrent connections for page resources, SSE
event streams, and POST requests for entity control. POST connections
may linger before closing, causing httpd_accept_conn errors (ENFILE)
when the socket pool is too small.
This commit is contained in:
J. Nick Koston
2026-02-18 18:18:59 -06:00
parent bd055e75b9
commit 3db34b4029
1 changed files with 4 additions and 3 deletions
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7
esphome/components/web_server/__init__.py
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@@ -144,9 +144,10 @@ def _consume_web_server_sockets(config: ConfigType) -> ConfigType:
"""Register socket needs for web_server component."""
from esphome.components import socket
# Web server needs 1 listening socket + typically 2 concurrent client connections
# (browser makes 2 connections for page + event stream)
sockets_needed = 3
# Web server needs 1 listening socket + typically 5 concurrent client connections
# (browser opens connections for page resources, SSE event stream, and POST
# requests for entity control which may linger before closing)
sockets_needed = 6
socket.consume_sockets(sockets_needed, "web_server")(config)
return config