Enable automatic retry on redis errors (#4595)

* Enable automatic retry on redis errors

ExponentialBackoff 3x retry for BusyLoadingError, ConnectionError, and TimeoutError

* retry on any redis error

* Use default single-retry for any RedisError

Using the default Retry means that async and sync clients get the appropriate type of Retry

reflex/utils/prerequisites.py

@@ -28,8 +28,8 @@ import typer
 from alembic.util.exc import CommandError
 from packaging import version
 from redis import Redis as RedisSync
-from redis import exceptions
 from redis.asyncio import Redis
+from redis.exceptions import RedisError
 
 from reflex import constants, model
 from reflex.compiler import templates
@@ -333,10 +333,11 @@ def get_redis() -> Redis | None:
     Returns:
         The asynchronous redis client.
     """
-    if isinstance((redis_url_or_options := parse_redis_url()), str):
+    if (redis_url := parse_redis_url()) is not None:
-        return Redis.from_url(redis_url_or_options)
+        return Redis.from_url(
-    elif isinstance(redis_url_or_options, dict):
+            redis_url,
-        return Redis(**redis_url_or_options)
+            retry_on_error=[RedisError],
+        )
     return None
 
 
@@ -346,14 +347,15 @@ def get_redis_sync() -> RedisSync | None:
     Returns:
         The synchronous redis client.
     """
-    if isinstance((redis_url_or_options := parse_redis_url()), str):
+    if (redis_url := parse_redis_url()) is not None:
-        return RedisSync.from_url(redis_url_or_options)
+        return RedisSync.from_url(
-    elif isinstance(redis_url_or_options, dict):
+            redis_url,
-        return RedisSync(**redis_url_or_options)
+            retry_on_error=[RedisError],
+        )
     return None
 
 
-def parse_redis_url() -> str | dict | None:
+def parse_redis_url() -> str | None:
     """Parse the REDIS_URL in config if applicable.
 
     Returns:
@@ -387,7 +389,7 @@ async def get_redis_status() -> dict[str, bool | None]:
             redis_client.ping()
         else:
             status = None
-    except exceptions.RedisError:
+    except RedisError:
         status = False
 
     return {"redis": status}