Hi Joe,
Have you checked your configuration for the VDBs if this feature flag is enabled? (see link below)
If Delphix detects a host has been rebooted which is typical during maintenance windows it will try to restart the datasets.
Automatic VDB restart on target server after reboot
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Robert Henning
Lead Member of Technical Staff
AthenaHealth
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Original Message:
Sent: 02-04-2025 08:38:02 AM
From: Joseph Sernicola
Subject: Connections during maintenance window
Thanks Rahim.

Test Environment Management
Joseph Sernicola
Lead Test Database Analyst
1901 Market street, 6th Floor
Philadelphia, PA 19103
P 215-241-3649

Original Message:
Sent: 2/4/2025 8:52:00 AM
From: Rahim Cetinel
Subject: RE: Connections during maintenance window
Hi Joseph,
This reminded me of something: I have a customer (they have a lot of MS SQL environments) and they have noticed that Delphix is acting (like throwing an error) faster than their own internal alarm system when it comes to detection of a Windows server going down or not responding. We have even thought about using Delphix as part of their internal detection.
BR,
Rahim CETINEL | |
Lead DataOps Architect | | | Delphix Blackbelt |
+971509176453 | | | +905334112490 |
Accuras DMCC DMCC Business Centre Unit No: 1518 Level No 1 Jewellery & Gemplex 3 P.O Box: 41174 Dubai – UAE | |
| | | |
Original Message:
Sent: 2/4/2025 8:47:00 AM
From: Joseph Sernicola
Subject: RE: Connections during maintenance window
Thanks for the quik reply Rahim.
I'll have to think about that. We may just live with the errors and setup an Outlook rule to send those mails to a folder.
Thanks again, Joe

Test Environment Management
Joseph Sernicola
Lead Test Database Analyst
1901 Market street, 6th Floor
Philadelphia, PA 19103
P 215-241-3649

Original Message:
Sent: 2/4/2025 8:31:00 AM
From: Rahim Cetinel
Subject: RE: Connections during maintenance window
Hi Joseph,
Short answer is no.
Longer answer is that it's part of the design that Delphix will throw an error if a dataset is not accessible.
What you can do is to disable the dSource and VDBs before the maintenance window. You can do this via GUI or API or dxtoolkit.
Rahim CETINEL | |
Lead DataOps Architect | | | Delphix Blackbelt |
+971509176453 | | | +905334112490 |
Accuras DMCC DMCC Business Centre Unit No: 1518 Level No 1 Jewellery & Gemplex 3 P.O Box: 41174 Dubai – UAE | |
| | | |
Original Message:
Sent: 2/4/2025 8:09:00 AM
From: Joseph Sernicola
Subject: Connections during maintenance window
Delphix tries to connect to our SQL DB servers during our scheduled weekly maintenance and as a result unnecessary errors are generated.
Is there a way to suppress errors during the maintenance window?
TY, Joe
Description | Failed to connect to host "xxx.com" for environment "xxx.com". Delphix may be unable to detect the correct state of the datasets on this host due to error : An error occurred while connecting to the Delphix Connector on remote host "xxx.com" using port "xxx" for environment "xxx.com". Command output: Connection refused (Connection refused) |
Action | Make sure that the host is up and the Delphix Connector service is running. |
Severity | CRITICAL |
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Joseph Sernicola
Application Development Technical Delivery Lead
Independence Blue Cross
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