From 75ac99385e05d8e1629248ec30ce48b967c15aa9 Mon Sep 17 00:00:00 2001
From: Heinz-Peter Liechtenecker <heinz-peter.liechtenecker@k-ai.at>
Date: Fri, 8 Apr 2022 09:35:03 +0200
Subject: [PATCH] Only call disconnect when Client is connected to a broker

---
 mqtt-plugin/src/Service.cpp | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/mqtt-plugin/src/Service.cpp b/mqtt-plugin/src/Service.cpp
index 63d035a..5fca2bf 100644
--- a/mqtt-plugin/src/Service.cpp
+++ b/mqtt-plugin/src/Service.cpp
@@ -39,9 +39,12 @@ void Service::disconnect()
     std::lock_guard<std::mutex> lock(m_mtx);
     if (m_client)
     {
-        m_client->disconnect(100)->wait();
-        m_client->disable_callbacks();
-        m_client.reset();
+        if (m_client->is_connected())
+        {
+            m_client->disconnect(100)->wait();
+            m_client->disable_callbacks();
+            m_client.reset();
+        }
     }
 }