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Preet avatar image
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Preet asked Preet commented

Flexsim distributed computing on webserver is not progressing

Hello!

The experiments gets submitted on webserver but it is not going beyond this. Sharing images.

Below is the connection check as "connected"

1676002615505.png

Below is the screenshot of flexsim webserver. It does receive createproxychildern when I ran the experiment.

1676002429950.png


Below is the experiment page. It is submitted on distributed CPU.

1676002660295.png


After all of these, it is mot moving forward. I followed below link to setup the VM.

https://answers.flexsim.com/articles/53302/using-amazon-web-services-for-distributed-experime.html

FlexSim 23.0.2
flexsim webserver
1676002429950.png (14.4 KiB)
1676002615505.png (4.4 KiB)
1676002660295.png (18.1 KiB)
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Jason Lightfoot avatar image Jason Lightfoot ♦♦ commented ·
You asked this question in another post - let us know if you still have problems after following the suggestion of checking your network rules/firewall etc.
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Preet avatar image Preet Jason Lightfoot ♦♦ commented ·

Hi @Jason Lightfoot Any solution to this? I do have enterprise license. Any possibilities that I can get on call support?

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Jason Lightfoot avatar image Jason Lightfoot ♦♦ commented ·

Hi @Preet,

We haven't heard back from you. Were you able to solve your problem? If so, please add and accept an answer to let others know the solution. Or please respond to the previous comment so that we can continue to help you.

If we don't hear back in the next 3 business days, we'll assume you were able to solve your problem and we'll close this case in our tracker. You can always comment back at any time to reopen your question, or you can contact your local FlexSim distributor for phone or email help.

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Preet avatar image Preet Jason Lightfoot ♦♦ commented ·
Hi Jason. I am still facing the problem. I checked the other answer where I commented but that did not resolve my problem. Hence, the question is still open.
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1 Answer

Ben Wilson avatar image
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Ben Wilson answered Preet commented

We found that the issue was a connection problem from the user's FlexSim PC and the connected cloud instances.

In testing, we were able to use the EC2 instances to run a distributed experiment from a different FlexSim PC on a different network. This showed that the EC2 instances were configured correctly, and suggested that the issue was communication between the user's FlexSim PC and the EC2 instances.

In attempting to diagnose the issue from the user's FlexSim PC to an EC2 instance, we found:

  • The user's FlexSim PC successfully connected to the FlexSim webserver on the EC2 instance.
  • The EC2 instance launched multiple FlexSim processes, suggesting that the EC2 instance received the model file from the user's FlexSim PC and spawned multiple simulation replications.
  • We successfully used Telnet to test a connection from the user's FlexSim PC to port 9001 (one of the replication processes).

All these showed that some outbound communication from the user's FlexSim PC to the EC2 instance was successful. However, it appeared that the user's FlexSim PC was not able to receive updates from the EC2 instance. This could be due to firewall, network, or security settings on the user's PC or network.

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Preet avatar image Preet commented ·
Thank you Ben and team. I will update here once I get into the contact with IT and resolve.
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Jeanette F avatar image Jeanette F ♦♦ Preet commented ·
Hello @Preet,

Were you able to get this resolved?

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Preet avatar image Preet Jeanette F ♦♦ commented ·
Hi @Jeanette F . I did not get a chance to work with IT team yet. However, that is in my to do list. Once I get a resolution, I will make sure to update here.
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