PBS scheduler logs - Access from host not allowed

Users/Site Administrators
1

Hello,

We are experiencing jobs perpetually stuck in a “Q” state. Our sched_logs are below. It seems to be a communication issue between the scheduler and the server, but everything in our /etc/hosts is resolvable. This problem arose after a reboot.
Can we can some advice as to what is going on here?

Also, here is our /etc/pbs.conf

PBS_EXEC=/opt/pbs
PBS_SERVER=wwadm01
PBS_START_SERVER=1
PBS_START_SCHED=1
PBS_START_COMM=1
PBS_START_MOM=0
PBS_SCHED_HOST=wwadm01
PBS_HOME=/var/spool/pbs
PBS_CORE_LIMIT=unlimited
PBS_SCP=/bin/scp
PBS_LEAF_NAME=wwadm01

01/10/2025 16:21:39;0002;pbs_sched;Svr;die;caught signal 15

01/10/2025 16:21:39;0080;pbs_sched;Req;;Killing worker threads

01/10/2025 16:21:39;0002;pbs_sched;Svr;Log;Log closed

01/10/2025 16:21:40;0002;pbs_sched;Svr;Log;Log opened

01/10/2025 16:21:40;0002;pbs_sched;Svr;pbs_sched;pbs_version=23.06.06

01/10/2025 16:21:40;0002;pbs_sched;Svr;pbs_sched;pbs_build=mach=N/A:security=N/A:configure_args=N/A

01/10/2025 16:21:40;0002;pbs_sched;Svr;pbs_sched;hostname=wwadm01;pbs_leaf_name=wwadm01;pbs_mom_node_name=N/A

01/10/2025 16:21:40;0002;pbs_sched;Svr;pbs_sched;ipv4 interface lo: localhost4.localdomain4

01/10/2025 16:21:40;0002;pbs_sched;Svr;pbs_sched;ipv4 interface eno1: wwadm01

01/10/2025 16:21:40;0002;pbs_sched;Svr;pbs_sched;ipv4 interface ens801f1: cm02

01/10/2025 16:21:40;0002;pbs_sched;Svr;pbs_sched;ipv4 interface ib0: wwadm01.ib.prime

01/10/2025 16:21:40;0002;pbs_sched;n/a;setup_env;read environment from /var/spool/pbs/pbs_environment

01/10/2025 16:21:40;0006;pbs_sched;Fil;pbs_sched;Version 23.06.06, started, initialization type = 0

01/10/2025 16:21:40;0002;pbs_sched;Svr;sched_main;/opt/pbs/sbin/pbs_sched startup pid 20644

01/10/2025 16:21:40;0040;pbs_sched;Fil;sched_config;Obsolete config name preempt_prio, instead use nothing - set via qmgr

01/10/2025 16:21:40;0040;pbs_sched;Fil;fairshare usage;Creating usage database for fairshare

01/10/2025 16:21:40;0080;pbs_sched;Req;;Launching 36 worker threads

01/10/2025 16:21:45;0001;pbs_sched;Svr;pbs_sched;Access from host not allowed, or unknown host (15008) in open_server_conns, Couldn’t register the scheduler default with connected server

01/10/2025 16:21:47;0001;pbs_sched;Svr;pbs_sched;Access from host not allowed, or unknown host (15008) in open_server_conns, Couldn’t register the scheduler default with connected server

01/10/2025 16:21:49;0001;pbs_sched;Svr;pbs_sched;Access from host not allowed, or unknown host (15008) in open_server_conns, Couldn’t register the scheduler default with connected server

01/10/2025 16:21:51;0001;pbs_sched;Svr;pbs_sched;Access from host not allowed, or unknown host (15008) in open_server_conns, Couldn’t register the scheduler default with connected server

2

Were there any changes made to hostname of the PBS Server host ? or any changes in your DNS
Try killing the pbs_sched and starting it manually $PBS_EXEC/sbin/pbs_sched. and check whether that resolves the issue.

or

try this suggestion Jobs stuck in queue. Scheduler connecting issues - #2 by alexis.cousein