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authorErik Johnston <erikj@element.io>2024-02-09 10:51:11 +0000
committerGitHub <noreply@github.com>2024-02-09 10:51:11 +0000
commitbfa93d1d3ba880244cbb8e8420832db1563bf6c3 (patch)
tree83601f94c213ed223c9d5344f2110a3f8c8896e6 /synapse/crypto
parent1.101.0rc1 (diff)
downloadsynapse-bfa93d1d3ba880244cbb8e8420832db1563bf6c3.tar.xz
Only do one concurrent fetch per server in keyring (#16894)
Otherwise if we've stacked a bunch of requests for the keys of a server,
we'll end up sending lots of concurrent requests for its keys,
needlessly.
Diffstat (limited to 'synapse/crypto')
-rw-r--r--synapse/crypto/keyring.py9
1 files changed, 5 insertions, 4 deletions
diff --git a/synapse/crypto/keyring.py b/synapse/crypto/keyring.py
index 1e7e5f70fe..8c301e077c 100644
--- a/synapse/crypto/keyring.py
+++ b/synapse/crypto/keyring.py
@@ -839,11 +839,12 @@ class ServerKeyFetcher(BaseV2KeyFetcher):
             Map from server_name -> key_id -> FetchKeyResult
         """
 
-        results = {}
+        # We only need to do one request per server.
+        servers_to_fetch = {k.server_name for k in keys_to_fetch}
 
-        async def get_keys(key_to_fetch_item: _FetchKeyRequest) -> None:
-            server_name = key_to_fetch_item.server_name
+        results = {}
 
+        async def get_keys(server_name: str) -> None:
             try:
                 keys = await self.get_server_verify_keys_v2_direct(server_name)
                 results[server_name] = keys
@@ -852,7 +853,7 @@ class ServerKeyFetcher(BaseV2KeyFetcher):
             except Exception:
                 logger.exception("Error getting keys from %s", server_name)
 
-        await yieldable_gather_results(get_keys, keys_to_fetch)
+        await yieldable_gather_results(get_keys, servers_to_fetch)
         return results
 
     async def get_server_verify_keys_v2_direct(