[Tarantool-patches] [PATCH 1/2] replication: make anon replicas iteration safe

[Ilya Kosarev <i.kosarev@tarantool.org>]

In replicaset_follow we iterate anon replicas list: list of replicas
that haven't received an UUID. In case of successful connect replica
link is being removed from anon list. If it happens immediately,
without yield in applier, iteration breaks. Now it is fixed by
rlist_foreach_entry_safe instead of common rlist_foreach_entry.

Part of #4586
---
 src/box/replication.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/box/replication.cc b/src/box/replication.cc
index 509187cd3..495a01c4f 100644
--- a/src/box/replication.cc
+++ b/src/box/replication.cc
@@ -800,7 +800,8 @@ replicaset_follow(void)
 		if (replica->applier != NULL)
 			applier_resume(replica->applier);
 	}
-	rlist_foreach_entry(replica, &replicaset.anon, in_anon) {
+	struct replica *tmp;
+	rlist_foreach_entry_safe(replica, &replicaset.anon, in_anon, tmp) {
 		/* Restart appliers that failed to connect. */
 		applier_start(replica->applier);
 	}
-- 
2.17.1