MID Server Generating 204 and 401 via Guest User

[Sloan D_]

I am a Junior Systems Administrator supporting an environment that uses a few MID servers.  The ISSO has noticed that a couple of MID servers are generating numerous 401 errors via the Guest User account.  Another MID server is generating a 204 error via the Guest User account also.  I thought that the MID servers only use the "soap.guest" account.   I have visited many websites and have yet to land on a site that explains why the Guest User is involved with the MID server's communication back to the instance/ECC Queue or the handshake that would cause these two errors.  Does anyone have any idea as to where I should direct my troubleshooting efforts? 

Thanks for any and all suggestions!

[AshishKM]

Hi @Sloan D_,

Any chance system has some integration via the MID and third party is sending guest account ( or no valid user ) for creating/updating the record.

And where exactly this 401 and 204 error showing .. any log details. 

-Thanks,
AshishKMishra

[Sloan D_]

Thank you for the quick response, Ashish!  The errors are generated by the Instance in response to the MID servers.  I will see what additional information I am allowed to reveal when I return to work tomorrow.  Meanwhile, I will see if I can discover or detect any third-party system.

Thanks again!

[Sloan D_]

Thank you very much for your suggestion, Ashish! 

The errors are the instance's response to incoming connections into the ECC Queue.  These connections are bombarding the instance. 

I viewed the different logs suggested by Harish and asked my team.  My team informed me that there is a separate Load Balancer managing the traffic specifically to our MID servers!  I am beginning to think that this might be the "third party" integration that you were referring to!  But, I am still perplexed as to why it would be using a Guest User account.

My troubleshooting resumes!  Nonetheless, I believe I have found a direction to my troubleshooting!  Thanks again!

[Harish Bainsla]

HI

Here are a few steps you can take to troubleshoot the issue:

1.  Check MID Server Credentials

2. Review MID Server Logs

3. Check Connection Settings

4. Check  ECC Queue Entries