# Warewulf cluster connection to OpenPBS failure

**URL:** https://community.openpbs.org/t/warewulf-cluster-connection-to-openpbs-failure/4223
**Category:** Users/Site Administrators
**Created:** [March 18, 2026, 1:27pm UTC](https://community.openpbs.org/t/warewulf-cluster-connection-to-openpbs-failure/4223 "2026-03-18T13:27:30Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![gpaszek\_ec-e](https://avatars.discourse-cdn.com/v4/letter/g/977dab/32.png) [@gpaszek\_ec-e](https://community.openpbs.org/u/gpaszek_ec-e)
#### Post date: [March 18, 2026, 1:27pm UTC](https://community.openpbs.org/t/warewulf-cluster-connection-to-openpbs-failure/4223/1 "2026-03-18T13:27:30Z")

</div>

Hi,  
I have an issue, which is quite crucial for going further. I’ve tried to install OpenPBS on Warewulf and as I’ve dealt with installation, connected some nodes from cluster to OpenPBS server problem has occured. I cannot send any job to it because of an error showed in attachments.

”  
titan-n1  
Mom = titan-n1.ece.local  
Port = 15002  
pbs\_version = 23.06.06  
ntype = PBS  
state = free  
pcpus = 32  
resources\_available.arch = linux  
resources\_available.host = titan-n1  
…  
”

 ![obraz](https://canada1.discourse-cdn.com/flex030/uploads/pbspro/original/1X/3993ff422827b3a5faed4bbde62e5e3d2901781a.png)

OpenPBS services running perfectly only while booting from PXE sometimes it has to be turned on manually. The system is : Rocky Linux 9.6 (Blue Onyx)

Best regards,  
Grzegorz

---

<div class="post-metadata">

### Author: ![adarsh](https://avatars.discourse-cdn.com/v4/letter/a/f07891/32.png) [@adarsh](https://community.openpbs.org/u/adarsh)
#### Post date: [March 19, 2026, 6:00pm UTC](https://community.openpbs.org/t/warewulf-cluster-connection-to-openpbs-failure/4223/2 "2026-03-19T18:00:42Z")

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To understand the above correctly

- The compute nodes are booted up (PXE boot)
- pbs\_mom service is running / if this service is not up and running, you manually start the service  
[or you can make sure pbs\_mom services is started at the last once all the system servces or all up and running]
- pbsnodes -av # shows all nodes are connected to the PBS Server
- now job is submitted [whether this job runs fine or does this job fails]

> [@gpaszek\_ec-e](#):
>
> I cannot send any job to it because of an error showed in attachments.

Could you please share the job script or did you try running simple test job like below

```auto
qsub -- /bin/hostname
qsub -- /bin/sleep 10

```

Make sure on the compute nodes /var does not have any permissions set that is affecting this.  
In the above screenshot system copy ( cp or scp based on the configuration) failed, as the file did not exist.

Please check the ports are not blocked [PBS Implementation on AWS - #4 by adarsh](https://community.openpbs.org/t/pbs-implementation-on-aws/4183/4)