# PBS daemons are running but connection refused **URL:** \ **Category:** Users/Site Administrators\ **Created:** [April 8, 2021, 11:55am UTC](https://community.openpbs.org/t/pbs-daemons-are-running-but-connection-refused/2564 "2021-04-08T11:55:38Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![geonhong](https://avatars.discourse-cdn.com/v4/letter/g/b3f665/32.png) [@geonhong](https://community.openpbs.org/u/geonhong)\ **Post date:** [April 8, 2021, 11:55am UTC](https://community.openpbs.org/t/pbs-daemons-are-running-but-connection-refused/2564/1 "2021-04-08T11:55:38Z")
Hi, I installed the OpenPBS on my Centos 8 and did the following additional things. - Disabled SELinux and firewall - Access SSH to pbshost without password - Add proper address to /etc/hosts file as 192.168.0.229 pbshost And I can see that all the PBS daemons are running as following > pbs\_server is pid 29477 > pbs\_mom is pid 2531 > pbs\_sched is pid 2545 > pbs\_comm is 2520 But when I run the `qmgr` command, it refuses the connection. > Connection refused > qmgr: cannot connect to server I have no idea how to deal with this problem. I need your help. Thank you and have a nice day. Geon-Hong ---
**Author:** ![adarsh](https://avatars.discourse-cdn.com/v4/letter/a/f07891/32.png) [@adarsh](https://community.openpbs.org/u/adarsh)\ **Post date:** [April 8, 2021, 9:28pm UTC](https://community.openpbs.org/t/pbs-daemons-are-running-but-connection-refused/2564/2 "2021-04-08T21:28:13Z")
> [@geonhong](#): > > - Disabled SELinux and firewall 1. After disabling the SELinux did you reboot the system ? 2. Please also run these command systemctl stop firewalld systemctl mask firewalld 3. Please check these ports are accessible 15001-15009 and 17001 4. you can install the strace on the system and run ` strace qmgr` # this might give lot of information and finally might tell you where it got stuck > [@geonhong](#): > > But when I run the `qmgr` command, it refuses the connection. Please open two terminals Terminal1 as root user, run the : `qmgr` command Terminal2 as root user : `source /etc/pbs.conf ; tail -f $PBS_HOME/server_logs/YYYYDDMM` You can capture the error that is captured and find out the reason 1. Please share the output of cat /etc/pbs.conf cat /etc/hosts Hope this helps ---
**Author:** ![geonhong](https://avatars.discourse-cdn.com/v4/letter/g/b3f665/32.png) [@geonhong](https://community.openpbs.org/u/geonhong)\ **Post date:** [April 9, 2021, 9:50am UTC](https://community.openpbs.org/t/pbs-daemons-are-running-but-connection-refused/2564/3 "2021-04-09T09:50:09Z")
Hi adarsh, I read your previous posts and followed the instructions. It really helped me to resolve this problem. > 1. After disabling the SELinux did you reboot the system ? Yes. But it didn’t work. > 1. Please also run these command > systemctl stop firewalld Done. > systemctl mask firewalld Done. > 1. Please check these ports are accessible > 15001-15009 and 17001 How can I open those ports without using the firewalld, since the firewalld is disabled already? How can I get to know if the port is accessible or not? (I am using nc or netstat for checking but is it correct way to check?) > 1. you can install the strace on the system and run > `strace qmgr` # this might give lot of information and finally might tell you where it got stuck I ran the `strace qmgr` but I cannot catch the reason of the problem. ======== I found something was wrong with my postgresql thing so I installed the postgresql-server again. So the error regarding pg\_ctl thing has been resolved but still has some problem. > 04/09/2021 15:51:41;0d80;Server@pbshost;TPP;Server@pbshost(Main Thread);Initializing TPP transport Layer > 04/09/2021 15:51:41;0d80;Server@pbshost;TPP;Server@pbshost(Main Thread);Max files allowed = 16384 > 04/09/2021 15:51:41;0d80;Server@pbshost;TPP;Server@pbshost(Main Thread);TPP initialization done > 04/09/2021 15:51:41;0d80;Server@pbshost;TPP;Server@pbshost(Main Thread);Connecting to pbs\_comm pbshost:17001 > 04/09/2021 15:51:41;0c06;Server@pbshost;TPP;Server@pbshost(Thread 0);Thread ready > 04/09/2021 15:51:41;0c06;Server@pbshost;TPP;Server@pbshost(Thread 0);Registering address 192.168.0.229:15001 to pbs\_comm pbshost:17001 > 04/09/2021 15:51:41;0c06;Server@pbshost;TPP;Server@pbshost(Thread 0);Registering address 192.168.122.1:15001 to pbs\_comm pbshost:17001 > 04/09/2021 15:51:41;0c06;Server@pbshost;TPP;Server@pbshost(Thread 0);Connected to pbs\_comm pbshost:17001 > 04/09/2021 15:51:41;0002;Server@pbshost;n/a;setup\_env;read environment from /var/spool/pbs/pbs\_environment > 04/09/2021 15:51:41;0000;Server@pbshost;Svr;Server@pbshost;Supported authentication method: resvport > 04/09/2021 15:51:41;0002;Server@pbshost;Svr;Server@pbshost;Stopping PBS dataservice This is the tail of my server log. I’m not sure why the PBS dataservice was stopped. Here’s my pbs.conf and hosts files. /etc/pbs.conf > ``` > PBS_SERVER=pbshost > PBS_START_SERVER=1 > PBS_START_SCHED=1 > PBS_START_COMM=1 > PBS_START_MOM=1 > PBS_EXEC=/opt/pbs > PBS_HOME=/var/spool/pbs > PBS_CORE_LIMIT=unlimited > PBS_SCP=/bin/scp > > ``` /etc/hosts > ``` > 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 > ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 > > 192.168.0.229 pbshost > > ``` Thank you. ---
**Author:** ![adarsh](https://avatars.discourse-cdn.com/v4/letter/a/f07891/32.png) [@adarsh](https://community.openpbs.org/u/adarsh)\ **Post date:** [April 10, 2021, 7:09pm UTC](https://community.openpbs.org/t/pbs-daemons-are-running-but-connection-refused/2564/4 "2021-04-10T19:09:37Z")
> [@geonhong](#): > > How can I open those ports without using the firewalld, since the firewalld is disabled already? > How can I get to know if the port is accessible or not? (I am using nc or netstat for checking but is it correct way to check?) Once the firewalld services are stopped and disabled , then the ports should be opened. You can try to check if port are open or not using telnet command telnet hostname ``` example for open connection: root@pbspro:~# telnet pbspro 6200 Trying 204.235.30.17... Connected to pbspro. Escape character is '^]'. to quit example of closed port: root@pbspro:~# telnet pbspro 6201 Trying 192.168.30.17... telnet: connect to address 92.168.30.17: Connection refused ``` The logs shared does not tell us about any issues. If there is an issue, please try to un-install PBS Pro and install it again .