Error: Could not reach a master server

[mahmood naderan]

Hi Werner,
Do you know what does the following output mean?

[root@rocks7 /etc]# rocks sync slurm
compute-0-6: Error: Could not reach a master server. Masters: [http://10.1.1.1:372/411.d/ (-1)]
compute-0-5: Error: Could not reach a master server. Masters: [http://10.1.1.1:372/411.d/ (-1)]
compute-0-4: Error: Could not reach a master server. Masters: [http://10.1.1.1:372/411.d/ (-1)]
compute-0-2: Error: Could not reach a master server. Masters: [http://10.1.1.1:372/411.d/ (-1)]
compute-0-0: Error: Could not reach a master server. Masters: [http://10.1.1.1:372/411.d/ (-1)]
compute-0-1: Error: Could not reach a master server. Masters: [http://10.1.1.1:372/411.d/ (-1)]
compute-0-3: Error: Could not reach a master server. Masters: [http://10.1.1.1:372/411.d/ (-1)]

Slurm processes are fine on the frontend (10.1.1.1)

[root@rocks7 etc]# ps aux | grep slurm
kouhika+  1733  0.0  0.0   4348   336 pts/23   S+   Jun10   0:00 /usr/libexec/slurm-spank-x11 -t compute-0-6 -i 629.0 -cgw -s ssh -o
kouhika+  1734  4.1  0.0 186380 14160 pts/23   S+   Jun10 218:47 ssh -Y compute-0-6 /usr/libexec/slurm-spank-x11 -i 629.0 -c -g -w -s "ssh" -o ""
root      2823  0.0  0.0 340988  2832 ?        Sl   Apr13   0:31 /usr/sbin/slurmdbd
root      3149  0.0  0.0 146200  2632 ?        S    May19   0:10 /usr/sbin/slurmd
root     21618  0.0  0.0 1007740 4188 ?        Sl   18:23   0:00 /usr/sbin/slurmctld
root     22253  0.0  0.0 273228  3200 ?        Sl   07:19   0:21 slurmstepd: [685.batch]
azimi    22257  0.0  0.0   9696  1536 ?        S    07:19   0:00 /bin/bash /var/spool/slurmd/job00685/slurm_script
root     22467  0.0  0.0 112712   964 pts/0    S+   18:25   0:00 grep --color=auto slurm

[Werner Saar]

Hi,
the httpd daemon on the Head-Node is listening on the ports 80, 372 and 443.
It seems, that the httpd daemon is not running.

Werner

On 06/13/2018 03:56 PM, mahmood naderan wrote:

Hi Werner,
Do you know what does the following output mean?

~~~
[root@rocks7 /etc]# rocks sync slurm
compute-0-6: Error: Could not reach a master server. Masters: [http://10.1.1.1:372/411.d/ (-1)]
compute-0-5: Error: Could not reach a master server. Masters: [http://10.1.1.1:372/411.d/ (-1)]
compute-0-4: Error: Could not reach a master server. Masters: [http://10.1.1.1:372/411.d/ (-1)]
compute-0-2: Error: Could not reach a master server. Masters: [http://10.1.1.1:372/411.d/ (-1)]
compute-0-0: Error: Could not reach a master server. Masters: [http://10.1.1.1:372/411.d/ (-1)]
compute-0-1: Error: Could not reach a master server. Masters: [http://10.1.1.1:372/411.d/ (-1)]
compute-0-3: Error: Could not reach a master server. Masters: [http://10.1.1.1:372/411.d/ (-1)]
~~~

Slurm processes are fine on the frontend (10.1.1.1)

~~~
[root@rocks7 etc]# ps aux | grep slurm
kouhika+ 1733 0.0 0.0 4348 336 pts/23 S+ Jun10 0:00 /usr/libexec/slurm-spank-x11 -t compute-0-6 -i 629.0 -cgw -s ssh -o
kouhika+ 1734 4.1 0.0 186380 14160 pts/23 S+ Jun10 218:47 ssh -Y compute-0-6 /usr/libexec/slurm-spank-x11 -i 629.0 -c -g -w -s "ssh" -o ""
root 2823 0.0 0.0 340988 2832 ? Sl Apr13 0:31 /usr/sbin/slurmdbd
root 3149 0.0 0.0 146200 2632 ? S May19 0:10 /usr/sbin/slurmd
root 21618 0.0 0.0 1007740 4188 ? Sl 18:23 0:00 /usr/sbin/slurmctld
root 22253 0.0 0.0 273228 3200 ? Sl 07:19 0:21 slurmstepd: [685.batch]
azimi 22257 0.0 0.0 9696 1536 ? S 07:19 0:00 /bin/bash /var/spool/slurmd/job00685/slurm_script
root 22467 0.0 0.0 112712 964 pts/0 S+ 18:25 0:00 grep --color=auto slurm
~~~

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Error: Could not reach a master server

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[mahmood naderan]

Yes. the httpd was dead!
Thanks