From fecb02ef87ce4499ea2c93d51789d1834c016bea Mon Sep 17 00:00:00 2001
From: nexustar <wangkang@pingcap.com>
Date: Mon, 21 Nov 2022 10:35:57 +0800
Subject: [PATCH] playground: fix panic (#2076)

---
 components/playground/playground.go | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/components/playground/playground.go b/components/playground/playground.go
index d14985b7f5..c2bd30afcb 100644
--- a/components/playground/playground.go
+++ b/components/playground/playground.go
@@ -1012,55 +1012,55 @@ func (p *Playground) terminate(sig syscall.Signal) {
 		timer.Stop()
 	}
 
-	if p.monitor != nil {
+	if p.monitor != nil && p.monitor.cmd != nil && p.monitor.cmd.Process != nil {
 		go kill("prometheus", p.monitor.cmd.Process.Pid, p.monitor.wait)
 	}
 
-	if p.ngmonitoring != nil {
+	if p.ngmonitoring != nil && p.ngmonitoring.cmd != nil && p.ngmonitoring.cmd.Process != nil {
 		go kill("ng-monitoring", p.ngmonitoring.cmd.Process.Pid, p.ngmonitoring.wait)
 	}
 
-	if p.grafana != nil {
+	if p.grafana != nil && p.grafana.cmd != nil && p.grafana.cmd.Process != nil {
 		go kill("grafana", p.grafana.cmd.Process.Pid, p.grafana.wait)
 	}
 	for _, inst := range p.tiflashs {
-		if inst.Process != nil {
+		if inst.Process != nil && inst.Process.Cmd() != nil && inst.Process.Cmd().Process != nil {
 			kill(inst.Component(), inst.Pid(), inst.Wait)
 		}
 	}
 	for _, inst := range p.ticdcs {
-		if inst.Process != nil {
+		if inst.Process != nil && inst.Process.Cmd() != nil && inst.Process.Cmd().Process != nil {
 			kill(inst.Component(), inst.Pid(), inst.Wait)
 		}
 	}
 	for _, inst := range p.tikvCdcs {
-		if inst.Process != nil {
+		if inst.Process != nil && inst.Process.Cmd() != nil && inst.Process.Cmd().Process != nil {
 			kill(inst.Component(), inst.Pid(), inst.Wait)
 		}
 	}
 	for _, inst := range p.drainers {
-		if inst.Process != nil {
+		if inst.Process != nil && inst.Process.Cmd() != nil && inst.Process.Cmd().Process != nil {
 			kill(inst.Component(), inst.Pid(), inst.Wait)
 		}
 	}
 	// tidb must exit earlier then pd
 	for _, inst := range p.tidbs {
-		if inst.Process != nil {
+		if inst.Process != nil && inst.Process.Cmd() != nil && inst.Process.Cmd().Process != nil {
 			kill(inst.Component(), inst.Pid(), inst.Wait)
 		}
 	}
 	for _, inst := range p.pumps {
-		if inst.Process != nil {
+		if inst.Process != nil && inst.Process.Cmd() != nil && inst.Process.Cmd().Process != nil {
 			kill(inst.Component(), inst.Pid(), inst.Wait)
 		}
 	}
 	for _, inst := range p.tikvs {
-		if inst.Process != nil {
+		if inst.Process != nil && inst.Process.Cmd() != nil && inst.Process.Cmd().Process != nil {
 			kill(inst.Component(), inst.Pid(), inst.Wait)
 		}
 	}
 	for _, inst := range p.pds {
-		if inst.Process != nil {
+		if inst.Process != nil && inst.Process.Cmd() != nil && inst.Process.Cmd().Process != nil {
 			kill(inst.Component(), inst.Pid(), inst.Wait)
 		}
 	}