[PATCH] replication: fix exit with ER_NO_SUCH_USER during bootstrap

[Serge Petrenko <sergepetrenko@tarantool.org>]

When replication is configured via some user created in box.once()
function and box.once() takes more than replication_timeout seconds
to execute, appliers recieve ER_NO_SUCH_USER error, which they don't
handle. This leads to occasional test failures in replication suite.
Fix this by handling the aforementioned case in applier_f().

Closes #3637
---
https://github.com/tarantool/tarantool/issues/3637
https://github.com/tarantool/tarantool/tree/sp/gh-3637-replication-tests-fix

 src/box/applier.cc | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/box/applier.cc b/src/box/applier.cc
index dbb4d05f9..740778e80 100644
--- a/src/box/applier.cc
+++ b/src/box/applier.cc
@@ -607,6 +607,14 @@ applier_f(va_list ap)
 				applier_log_error(applier, e);
 				applier_disconnect(applier, APPLIER_DISCONNECTED);
 				goto reconnect;
+			} else if (e->errcode() == ER_NO_SUCH_USER) {
+				/*
+				 * Probably box.once() hasn't finished
+				 * on bootstrap leader yet.
+				 */
+				applier_log_error(applier, e);
+				applier_disconnect(applier, APPLIER_DISCONNECTED);
+				goto reconnect;
 			} else if (e->errcode() == ER_SYSTEM) {
 				/* System error from master instance. */
 				applier_log_error(applier, e);
-- 
2.15.2 (Apple Git-101.1)