failed to connect Unknown:7654

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欧拉系统默认安装的opengauss，过一段时间后就会出现failed to connect Unknown:7654，昨天还是可以，今天就这样

使用 gs_ctl restart 重启失败

```
[opengauss@localhost ~]$ gs_ctl restart
[2023-07-13 17:46:05.045][2078][][gs_ctl]: gs_ctl restarted ,datadir is /var/lib/opengauss/data 
waiting for server to shut down... failed
[2023-07-13 17:47:05.157][2078][][gs_ctl]:  server does not shut down
[2023-07-13 17:47:05.157][2078][][gs_ctl]: port:7654 already in use. /proc/net/tcp:
  sl  local_address rem_address   st tx_queue rx_queue tr tm->when retrnsmt   uid  timeout inode  
   0: 0100007F:1DE6 00000000:0000 0A 00000000:00000000 00:00000000 00000000  1000        0 28520 1 00000000d429b396 100 0 0 10 0                     
[2023-07-13 17:47:05.157][2078][][gs_ctl]: CheckPort: popen(command:lsof -i:7654 | grep -E 'COMMAND|LISTEN').
COMMAND  PID      USER   FD   TYPE DEVICE SIZE/OFF NODE NAME

gaussdb 1738 opengauss    4u  IPv4  28520      0t0  TCP localhost:7654 (LISTEN)

[2023-07-13 17:47:05.208][2078][][gs_ctl]: port conflict when start server
[2023-07-13 17:47:05.208][2078][][gs_ctl]: waiting for server to start...
.0 LOG:  [Alarm Module]can not read GAUSS_WARNING_TYPE env.
	
0 LOG:  [Alarm Module]Host Name: localhost.localdomain 
	
0 LOG:  [Alarm Module]Host IP: 127.0.0.1 
	
0 LOG:  [Alarm Module]Get ENV GS_CLUSTER_NAME failed!
	
0 LOG:  [Alarm Module]Invalid data in AlarmItem file! Read alarm English name failed! line: 55
	
0 WARNING:  failed to open feature control file, please check whether it exists: FileName=gaussdb.version, Errno=2, Errmessage=No such file or directory.
0 WARNING:  failed to parse feature control file: gaussdb.version.
0 WARNING:  Failed to load the product control file, so gaussdb cannot distinguish product version.
The core dump path is an invalid directory
2023-07-13 09:47:05.259 [unknown] [unknown] localhost 140358634632768 0[0:0#0]  0 [BACKEND] LOG:  when starting as multi_standby mode, we couldn't support data replicaton.
2023-07-13 09:47:05.260 [unknown] [unknown] localhost 140358634632768 0[0:0#0]  0 [BACKEND] LOG:  [Alarm Module]can not read GAUSS_WARNING_TYPE env.
	
2023-07-13 09:47:05.260 [unknown] [unknown] localhost 140358634632768 0[0:0#0]  0 [BACKEND] LOG:  [Alarm Module]Host Name: localhost.localdomain 
	
2023-07-13 09:47:05.260 [unknown] [unknown] localhost 140358634632768 0[0:0#0]  0 [BACKEND] LOG:  [Alarm Module]Host IP: 127.0.0.1 
	
2023-07-13 09:47:05.260 [unknown] [unknown] localhost 140358634632768 0[0:0#0]  0 [BACKEND] LOG:  [Alarm Module]Get ENV GS_CLUSTER_NAME failed!
	
2023-07-13 09:47:05.260 [unknown] [unknown] localhost 140358634632768 0[0:0#0]  0 [BACKEND] LOG:  [Alarm Module]Invalid data in AlarmItem file! Read alarm English name failed! line: 55
	
2023-07-13 09:47:05.265 [unknown] [unknown] localhost 140358634632768 0[0:0#0]  0 [BACKEND] FATAL:  lock file "postmaster.pid" already exists
2023-07-13 09:47:05.265 [unknown] [unknown] localhost 140358634632768 0[0:0#0]  0 [BACKEND] HINT:  Is another postmaster (PID 1738) running in data directory "/var/lib/opengauss/data"?
[2023-07-13 17:47:06.209][2078][][gs_ctl]: waitpid 2085 failed, exitstatus is 256, ret is 2

[2023-07-13 17:47:06.209][2078][][gs_ctl]: stopped waiting
[2023-07-13 17:47:06.209][2078][][gs_ctl]: could not start server
Examine the log output.
[opengauss@localhost ~]$ ^C

```
现在要怎么办

openGauss/openGauss-server

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