fix: sqlite3 and concurrent write requests caused database locked error some times, depending on how many concurrent requests and speed of disk drive. Fixed by reducign the number of concurrent db connections to 1 for sqlite3, fixes #7992

pkg/services/sqlstore/sqlstore.go

@@ -198,6 +198,9 @@ func LoadConfig() {
 
 	if DbCfg.Type == "sqlite3" {
 		UseSQLite3 = true
+		// only allow one connection as sqlite3 has multi threading issues that casue table locks
+		DbCfg.MaxIdleConn = 1
+		DbCfg.MaxOpenConn = 1
 	}
 	DbCfg.SslMode = sec.Key("ssl_mode").String()
 	DbCfg.CaCertPath = sec.Key("ca_cert_path").String()