If this is a single host machine I suggest checking the /etc/hosts file to make sure that ‘mannose’ is listed as you expect. It is generally advised to use FQDNs for host names; the fact that the message “connection to host:mannose:6819: Connection refused” used a short name may mean that in a configuration file you have a shortname. Equally the incoming connection may be coming not from the IP of ‘mannose’ but from localhost (127.0.0.1 if you are using only IPv4).
You also have a cluster name that looks like an FQDN, you may want to change that to something else; the cluster name is I think an abstract name, where host names must be for real nodes that are resolvable. You may also find information in /var/log/messages or /var/log/secure….if applicable to your Linux distro. I use Slurm with firewalld and it is fine usually. William From: slurm-users <slurm-users-boun...@lists.schedmd.com> On Behalf Of Sushil Mishra Sent: 30 November 2022 22:44 To: Slurm User Community List <slurm-users@lists.schedmd.com> Subject: [slurm-users] slurm_persist_conn_open_without_init: failed to open persistent connection to host Hi all, I installed slurm and enable accounting in a single-node machine, i.e same server is the master and computing node. I mainly followed this page for instructions: https://southgreenplatform.github.io/trainings/hpc/slurminstallation/ After enabling accounting I am having problems in starting slurmctld.service. [root@mannose sushil]# cat /var/log/slurm/slurmctld.log [2022-11-30T16:32:15.194] Job accounting information stored, but details not gathered [2022-11-30T16:32:15.195] slurmctld version 20.11.9 started on cluster mannose.olemiss.edu <http://mannose.olemiss.edu> [2022-11-30T16:32:15.201] error: slurm_persist_conn_open_without_init: failed to open persistent connection to host:mannose:6819: Connection refused [2022-11-30T16:32:15.201] error: Sending PersistInit msg: Connection refused [2022-11-30T16:32:15.201] accounting_storage/slurmdbd: clusteracct_storage_p_register_ctld: Registering slurmctld at port 6817 with slurmdbd [2022-11-30T16:32:15.203] error: Sending PersistInit msg: Connection refused [2022-11-30T16:32:15.203] error: Association database appears down, reading from state file. [2022-11-30T16:32:15.203] error: Unable to get any information from the state file [2022-11-30T16:32:15.203] fatal: slurmdbd and/or database must be up at slurmctld start time It is not clear why slurm port 8619 is being used while I have SlurmctldPort=6817 and SlurmdPort=6818 set in clurm.conf. anyways, I opened all three posrts (6817, 6818 and 6819) using 'firewall-cmd --permanent --zone=public --add-port=6819/tcp' MariaDB [(none)]> show grants -> ; +--------------------------------------------------------------------------------------------------------------+ | Grants for slurm@localhost | +--------------------------------------------------------------------------------------------------------------+ | GRANT USAGE ON *.* TO 'slurm'@'localhost' IDENTIFIED BY PASSWORD '*0E54A04D59B6C9F7B7B6269BE7F30AD3E3409895' | | GRANT ALL PRIVILEGES ON `slurm_acct_db`.* TO 'slurm'@'localhost' WITH GRANT OPTION | +--------------------------------------------------------------------------------------------------------------+ 2 rows in set (0.00 sec) MariaDB [(none)]> quit Can someone help in figuring out possibly what is going wrong? Best, SK
