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-rw-r--r--include/rabbit.hrl7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/rabbit.hrl b/include/rabbit.hrl
index bd7a0eedf5..0f1b7a506b 100644
--- a/include/rabbit.hrl
+++ b/include/rabbit.hrl
@@ -111,3 +111,10 @@
-define(INVALID_HEADERS_KEY, <<"x-invalid-headers">>).
-define(ROUTING_HEADERS, [<<"CC">>, <<"BCC">>]).
-define(DELETED_HEADER, <<"BCC">>).
+
+%% Trying to send a term across a cluster larger than 2^31 bytes will
+%% cause the VM to exit with "Absurdly large distribution output data
+%% buffer". So we limit the max message size to 2^31 - 10^6 bytes (1MB
+%% to allow plenty of leeway for the #basic_message{} and #content{}
+%% wrapping the message body).
+-define(MAX_MSG_SIZE, 2147383648).