Retry on more Plex connection failures during startup (#69822)

homeassistant/components/plex/__init__.py

@@ -159,7 +159,8 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
             entry.data[CONF_SERVER],
             error,
         )
-        return False
+        # Retry as setups behind a proxy can return transient 404 or 502 errors
+        raise ConfigEntryNotReady from error
 
     _LOGGER.debug(
         "Connected to: %s (%s)", plex_server.friendly_name, plex_server.url_in_use

tests/components/plex/test_init.py

@@ -63,7 +63,7 @@ async def test_setup_config_entry_with_error(hass, entry):
         await hass.async_block_till_done()
 
     assert len(hass.config_entries.async_entries(const.DOMAIN)) == 1
-    assert entry.state is ConfigEntryState.SETUP_ERROR
+    assert entry.state is ConfigEntryState.SETUP_RETRY
 
 
 async def test_setup_with_insecure_config_entry(hass, entry, setup_plex_server):