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Problem with Tokenserver

Answered
Tobias Höschen
  • Gurobi-versary
  • Conversationalist
  • First Question

Hi,

I am currently writing my master thesis and implemented an algorithm that uses Gurobi as a subroutine.

My professor allowed me to work on one of the university's computers and for performance reasons (I have multiple independent LPs) I am running multiple instances of the program on different cores.

My problem is that I inconsistently get the Error message:

ERROR: Failed to connect to token server 'myserver' (port 41954) - license file '/opt/cs/share/gurobi-client.lic'

I already looked into the QuickStartGuide but there was no solution for my problem. In the license file I found the info:

TYPE=TOKEN
TOKENSERVER=myserver
HOSTNAME=myserver
SOCKETS=2
CORES=8
USELIMIT=4096
DISTRIBUTED=100
SPECIAL=2

Thanks in advance for any advice how to solve the problem.

Best,

Tobias

1

Comments

6 comments

Date Votes
  • Official comment
    Simranjit Kaur
    • Gurobi Staff
    Edited
    This post is more than three years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum. Or why not try our AI Gurobot?.
  • Canqi Yao
    • Gurobi-versary
    • First Question
    • First Comment

    Hi Tobias,

    I have the same issue, how did you resolve it?

     

    Best,

    Canqi 

    0
  • Riley Clement
    • Gurobi Staff

    Hi Canqi,

    What happens if you run "ping myserver" (assuming TOKENSERVER=myserver in your client license) from a command line?

    - Riley

    0
  • Canqi Yao
    • Gurobi-versary
    • First Question
    • First Comment

    Hi Riley,

    The information shows the connection is refused! 

     

     

    0
  • Riley Clement
    • Gurobi Staff

    Hi Canqi,

    I'll create a ticket for this through our support system so we don't broadcast the details of your network publicly. You will receive an email related to this shortly.

    - Riley

    0
  • Gwyneth Butera
    • Gurobi Staff

    Are you sure that you can reach the tokenserver from the machine you are working on? You usually have to be in the same network, e.g., a University VPN. 
     
    You could try to ping or telnet to the token server to check whether you can actually reach it. You could also ask your IT department for further help regarding connection within your university network. It might be possible that there is a firewall preventing access.

    0

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