From 2082ad09a09f4b559711b390e360345dfd01981d Mon Sep 17 00:00:00 2001
From: Dima Tisnek <dima.tisnek@canonical.com>
Date: Fri, 6 Dec 2024 15:05:03 +0900
Subject: [PATCH] feat: larger default websockets frame size

---
 juju/client/connection.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/juju/client/connection.py b/juju/client/connection.py
index 03eb50961..b06c81cbc 100644
--- a/juju/client/connection.py
+++ b/juju/client/connection.py
@@ -108,8 +108,10 @@ class Connection:
 
     """
 
-    MAX_FRAME_SIZE = 2**22
-    "Maximum size for a single frame.  Defaults to 4MB."
+    # Juju 3.6 is limited by MongoDB transaction size limit, 16MB of BSON.
+    # Set the jRPC receive limit to 64MB of JSON to account for formatting differences.
+    MAX_FRAME_SIZE = 0x4_000_000
+    "Maximum size for a single frame, 64MB."
     facades: dict[str, int]
     _specified_facades: dict[str, Sequence[int]]
     bakery_client: Any