Failed to open publish sockets.

On my RHEL server when I run the

MATALAB_ROOT/toolbox/parallel/bin/startjobmanager

script, I get the error:

"The mjs service on the host <hostname> returned an error.

The cause of the problem is:

failed to open publish sockets. Cannot publish SRV record.

This is causing:

null.

This is causing:

Problem starting the job manager lookup process. "

What does that mean?

Answer 1

[Aditya]

Hi Michael,

This error means the MATLAB Job Manager can’t open the network ports it needs to advertise itself.

Most common causes:

• Firewall is blocking the required ports (27350–27450).
• Another process is using those ports.
• SELinux or permissions are blocking socket creation.
• Network misconfiguration (hostname/IP issue).

Quick fix steps:

1.Open the required ports on your firewall:

sudo firewall-cmd --permanent --add-port=27350-27450/tcp
sudo firewall-cmd --reload

2.Make sure no other process is using those ports.

3.Check SELinux (getenforce) and set to permissive for testing (setenforce 0).

4.Ensure your server has a valid IP address and hostname.

[Michael]

Thanks for your help. My apologies for the delayed response. The Firewall and SELinux were not the problem in this case. I did a complete un-install and re-install, and now it works. It appears that I corrupted something on the original install. Thanks again.