From ca05bbd652ad7436eae697a37175d9d2bc0c66c2 Mon Sep 17 00:00:00 2001
From: Pawel Chmielowski <pawel@process-one.net>
Date: Wed, 22 Oct 2025 14:59:39 +0200
Subject: [PATCH] Don't catch exit:{aborted, _} inside mnesia transactions

This is used by mnesia internally to retry deadlocked transaction,
so we should allow it to propagate.

This could be triggered by calling create_node concurrently from
multiple processes and did lead to {cyclic, ...} errors.
---
 src/mod_pubsub.erl | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/mod_pubsub.erl b/src/mod_pubsub.erl
index bd0aff20f..7204210bb 100644
--- a/src/mod_pubsub.erl
+++ b/src/mod_pubsub.erl
@@ -3920,6 +3920,8 @@ do_transaction(ServerHost, Fun, Trans, DBType) ->
     F = fun() ->
 		try Fun()
                 catch
+					exit:{aborted, _} = Err when DBType == mnesia ->
+						exit(Err);
                     Class:Reason:StackTrace when (DBType == mnesia andalso
                                                   Trans == transaction) orelse
                                                  DBType == sql ->