perfSONAR User Q&A and Other Discussion

[Raul Lopes <>]

Hi Mark,

Thanks for your reply. 

I posted this 

   Measuring MTU... Unsafe or unknown: MTU along path drops from 9000 to 1500

because the troubleshooting is reporting first Unsafe or Unknow. Then, it reports correctly that the MTU drops from 9000 to 1500.

That drop is correct and doesn't cause any problem at all. Both hosts are healthy and transfers between them are fine, but 

the troubleshooting result seems contradictory.  

The part of the Idle test, I posted because I couldn't understand and I was wondering if it could denote a configuration problem.

Yes, your ticket will help to clarify.

Thanks, 

Raul

---

From: Mark Feit <>
Sent: 27 April 2023 17:21
To: Raul Lopes <>; <>
Subject: Re: Idle error after update

 

Raul Lopes writes:

 

I have seen a few perfSONAR hosts that problems with the Idle test after update to 5.0? 

 

  Measuring MTU... Unsafe or unknown: MTU along path drops from 9000 to 1500

 

Check on this before trying to troubleshoot anything else.  MTU mismatches can be a source of problems, although I don’t think what you showed below is one of them.

 

  Checking services... Ticker... Scheduler... Runner... Archiver... OK.

…

  Idle test.... 9 seconds... Pending, probably missed... Failed.

Did not get a result: Resource Not found.

 

Has anyone seen that? A link to documentation explaining that error?

 

This means the system being tested scheduled a run of the test (starts life in the “pending” state; see notes at https://github.com/perfsonar/pscheduler/wiki/Run-States) and that nothing ever happened with it.  The likely cause is that the pscheduler-runner service on that host is either not running or is experiencing a problem.

 

I’ve written a ticket to make what comes out easier to understand:  https://github.com/perfsonar/pscheduler/issues/1331

 

--Mark

 

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