QuantumATK Forum

QuantumATK => Installation and License Questions => Topic started by: dhurba on July 10, 2012, 12:49

Title: no license server found
Post by: dhurba on July 10, 2012, 12:49
Hi i have connected 4 servers(1 is the master  where the license is installed)  using procedure given in the Parallel Guide tutorial.we have used mpich2.

now when we use the command mpdtrace , it gives "command not found" .

Also the command lmxendutil -licstat shows that there is no license server available..
Title: Re: no license server found
Post by: Anders Blom on July 12, 2012, 14:34
You will need to troubleshoot the license server first. Is it really running? Is it properly configured? Try running lmxendutil -licstat on the license server itself to see this, and also check the license server log files for hints that something might be wrong.

Next you must have UPD and TCP/IP ports 6200 open on the license server and your machine, in order to see the license across the network. This also assumes the machines are both on the same network segment, otherwise you need to manually specify the IP number of the license server via the environment variable QUANTUM_LICENSE_PATH, as described in the installation guide.
Title: Re: no license server found
Post by: dhurba on July 13, 2012, 07:08
Please see the screen shot of lmxendutil on the server itself and lmx-serv on the server
Title: Re: no license server found
Post by: dhurba on July 13, 2012, 08:16
The screen shot at the slaves
Title: Re: no license server found
Post by: kstokbro on July 13, 2012, 08:25
The slaves does not seem to have connection with the license server. What is the IP of the license server?
Try to see if you can ping the license server from the slaves.
ping IP
Somehow there must be a problem with the internet connection between the slaves and the license server
Title: Re: no license server found
Post by: dhurba on July 13, 2012, 08:47
the IP of the license server is 10.0.0.1

slaves are 10.0.0.2, 10.0.0.4, 10.0.0.5

ping 10.0.0.1 gives reply from all the 3 slaves

Title: Re: no license server found
Post by: Nordland on July 13, 2012, 09:10
Is the correct port open?

If yes, try to disable auto discovery and enter the ip-address manually as described in the manual.
Title: Re: no license server found
Post by: Anders Blom on July 13, 2012, 12:19
That is, run

Code
export QUANTUM_LICENSE_PATH=6200@10.0.0.1
lmxendutil -licstat
Title: Re: no license server found
Post by: dhurba on July 16, 2012, 06:36
Thanks it worked.. but next when i run the test script given in parallel guide
Code
mpiexec -n 4 /opt/QuantumWise/atk-12.2.0/atkpython/bin/atkpython /home/user/test_mpi.py > /home/user/test_mpi.log

it returns as
Code
 ssh:vlsi1: Temporary failure in name resolution [code]
[/code]
Title: Re: no license server found
Post by: dhurba on July 17, 2012, 08:08
When we use the command
Code
 mpiexec -n 4 /opt/QuantumWise/atk-12.2.0/atkpython/bin/atkpython /home/user/my_script.py > /home/user/my_script.log [code]

to submit a job (my_script.py) the simulation hangs after some time indicating that the slaves are not working.what might be the cause ?[/code]
Title: Re: no license server found
Post by: Anders Blom on July 17, 2012, 11:01
It's very difficult to say, it seems like some network problem. The error message is not printed by ATK, but by ssh showing that it is having problems connecting to the slave nodes. Check that mpd and is properly set up, and make sure the "test_mpi.py" script finishes properly before moving on to running more complex scripts.
Title: Re: no license server found
Post by: dhurba on July 17, 2012, 11:23
When i changed the host name to the IP ( for example 10.0.0.4) the message stopped coming ..

now mpiexec run on 10.0.0.4 gives the following log file
Title: Re: no license server found
Post by: Nordland on July 17, 2012, 11:59
Quote from: dhurba on July 17, 2012, 11:23
When i changed the host name to the IP ( for example 10.0.0.4) the message stopped coming ..

now mpiexec run on 10.0.0.4 gives the following log file


I think you setup your machine file, such that it sends the job to other machines instead of 4 processes on the same machine.
Title: Re: no license server found
Post by: dhurba on July 18, 2012, 07:30
Quote from: Anders Blom on July 17, 2012, 11:01
It's very difficult to say, it seems like some network problem. The error message is not printed by ATK, but by ssh showing that it is having problems connecting to the slave nodes. Check that mpd and is properly set up, and make sure the "test_mpi.py" script finishes properly before moving on to running more complex scripts.



Yes when i type 'mpdtrace' or 'mpdboot' it gives as "command not found"

Doesnt MPD installs automatically with mpich2.

the installation procedure we got does not have any mention about mpd

it shows only to install mpich2

by unzipping in the usr folder

./configure

make

make install

and editing bash

Title: Re: no license server found
Post by: Anders Blom on July 18, 2012, 12:25
No, mpd is not installed with MPICH2 anymore, as I recall. The default process manager is now hydra, which doesn't need the mpd* commands.

However, your parallel environment seems ok, however all MPI process run on the same node since you have not told it on which machines you want to run. For that you need a machinefile (see the MPICH2 documentation about that).