From ee7e63a6111ec8bf5961c0a0b3349bfc4e958224 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Markus=20M=C3=A4kel=C3=A4?= <markus.makela@mariadb.com>
Date: Wed, 29 May 2019 18:20:45 +0300
Subject: [PATCH] MXS-2464: Assert that responses are expected

A query should not be queued if no responses are expected. The code that
executes queued queries should be dead code and this assertion would catch
it.
---
 server/modules/routing/readwritesplit/rwsplitsession.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/server/modules/routing/readwritesplit/rwsplitsession.cc b/server/modules/routing/readwritesplit/rwsplitsession.cc
index 013bd9489..905952ca4 100644
--- a/server/modules/routing/readwritesplit/rwsplitsession.cc
+++ b/server/modules/routing/readwritesplit/rwsplitsession.cc
@@ -187,6 +187,7 @@ int32_t RWSplitSession::routeQuery(GWBUF* querybuf)
         m_query_queue.emplace_back(querybuf);
         querybuf = NULL;
         rval = 1;
+        mxb_assert(m_expected_responses != 0);
 
         if (m_expected_responses == 0 && !route_stored_query())
         {