From 4f0a71d7b49aa9a4d082d58a1ede4f27219b73ad Mon Sep 17 00:00:00 2001
From: Dhia Ayachi <dhia@hashicorp.com>
Date: Thu, 10 Feb 2022 13:30:49 -0500
Subject: [PATCH] =?UTF-8?q?fix=20race=20when=20starting=20a=20service=20wh?=
 =?UTF-8?q?ile=20the=20agent=20`serviceManager`=20is=20=E2=80=A6=20(#12302?=
 =?UTF-8?q?)?=
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* fix race when starting a service while the agent `serviceManager` is stopping

* add changelog
---
 .changelog/12302.txt | 3 +++
 agent/agent.go       | 4 ++--
 2 files changed, 5 insertions(+), 2 deletions(-)
 create mode 100644 .changelog/12302.txt

diff --git a/.changelog/12302.txt b/.changelog/12302.txt
new file mode 100644
index 0000000000..8609318a0d
--- /dev/null
+++ b/.changelog/12302.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+Fix a data race when a service is added while the agent is shutting down..
+```
diff --git a/agent/agent.go b/agent/agent.go
index 7e2a7f110a..dd981a459e 100644
--- a/agent/agent.go
+++ b/agent/agent.go
@@ -1368,14 +1368,14 @@ func (a *Agent) ShutdownAgent() error {
 	// this should help them to be stopped more quickly
 	a.baseDeps.AutoConfig.Stop()
 
+	a.stateLock.Lock()
+	defer a.stateLock.Unlock()
 	// Stop the service manager (must happen before we take the stateLock to avoid deadlock)
 	if a.serviceManager != nil {
 		a.serviceManager.Stop()
 	}
 
 	// Stop all the checks
-	a.stateLock.Lock()
-	defer a.stateLock.Unlock()
 	for _, chk := range a.checkMonitors {
 		chk.Stop()
 	}