提问参考模版：
- nebula 版本：v3.1.0
- 部署方式： 单机
- 安装方式： RPM
- 是否为线上版本： N
单机部署的nebula。先创建一个space，插入一些点/边，执行match命令，返回正常；
再创建一个空的space，然后执行任何查询，如match (v) return v limit 3; graphd进程直接退出！！！
必现问题。
相关日志 ERROR日志：
[root@localhost logs]# tail -f nebula-graphd.ERROR
Log file created at: 2022/05/23 08:26:16
Running on machine: localhost.localdomain
Running duration (h:mm:ss): 0:00:00
Log line format: [IWEF]yyyymmdd hh:mm:ss.uuuuuu threadid file:line] msg
E20220523 08:26:16.417160 9202 QueryInstance.cpp:137] SyntaxError: syntax error near ` '
E20220523 08:26:48.876263 9219 GraphSessionManager.cpp:260] Update sessions failed: Session not existed!
E20220523 08:26:48.876415 9227 GraphSessionManager.cpp:284] Update sessions failed: Update sessions failed: Session not existed!
INFO日志：
[root@localhost logs]# tail -f nebula-graphd.INFO
I20220523 08:30:21.626762 9203 GraphService.cpp:68] Authenticating user root from [::ffff:192.168.101.138]:53444
I20220523 08:30:29.507275 9203 SwitchSpaceExecutor.cpp:37] Graph switched to `sp_10219769125f453ebcb6d62a95503179', space id: 11
I20220523 08:30:55.001055 9199 GraphService.cpp:68] Authenticating user root from [::ffff:192.168.101.138]:53354
I20220523 08:30:55.063608 9209 GraphService.cpp:68] Authenticating user root from [::ffff:192.168.101.138]:53354
I20220523 08:30:55.066550 9203 GraphService.cpp:68] Authenticating user root from [::ffff:192.168.101.138]:53354
I20220523 08:31:01.709585 9203 GraphService.cpp:68] Authenticating user root from [::ffff:192.168.101.138]:53354
I20220523 08:31:02.855854 9209 GraphService.cpp:68] Authenticating user root from [::ffff:192.168.101.138]:53354
I20220523 08:31:11.459897 9208 GraphService.cpp:68] Authenticating user root from [::ffff:192.168.101.138]:53354
I20220523 08:31:25.321976 9203 GraphService.cpp:68] Authenticating user root from [::ffff:192.168.200.150]:64640
I20220523 08:31:25.333889 9203 SwitchSpaceExecutor.cpp:37] Graph switched to `sp_10219769125f453ebcb6d62a95503179', space id: 11
在nebua目录下，发现有core文件生成，大小约400MB。 如有需要，可以上传。