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Warning issued on task startup
ParaStation5 Administrator's Guide 31
This typically happens, if the frontend or head node is included as compute node and also acts as gateway
for the compute nodes. The "external" address of the frontend is not known to the compute nodes.
Use the PSP_NETWORK environment variable to re-direct all traffic to the cluster-internal network. See
ps_environment(5) and Section 5.8, “Controlling ParaStation5 communication paths” for details.
6.7. Warning issued on task startup
While starting up a parallel task, the message
execClient: chdir(/usr/tmp/username/./.): No such file or \
directory
Will use user's home directory
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is displayed.
The current directory /usr/tmp/username does not exist on one or more of the remote nodes. The user's
home directory, defined by the environment variable HOME will be used instead.
Make sure that the directory /usr/tmp/username is accessible on each node or change your current
directory to a globally accessible directory.
6.8. Problem: pssh fails
Problem: users other than root cannot run commands on remote nodes using the pssh command.
$ pssh -n 0 date
PSI: dospawn: spawn to node 0 failed: Permission denied
By default, only root may spawn processes which are not consuming CPUs. The command pssh uses this
way to run a process on a remote node.
To allow other users to spawn this type of processes, add the user or group to the adminuser or admingroup
list within ParaStation using the command
psiadmin> set adminuser +username
psiadmin> set admingroup +group
or add appropriate adminuser and/or admingroup entries to the ParaStation configuration file
parastation.conf.
6.9. Problem: psid does not startup, reports port in use
Problem: the psid terminates after startup reporting that the port 886 is in use.
By default, the psid uses the port 886 (UDP) for the RDP protocol (inter-daemon communication). If this
port is already in use, the daemon refuses to start-up and terminates immediately.