# Draining a Virtual Service

**URL:** <https://community.a10networks.com/t/draining-a-virtual-service/333>\
**Category:** ADC - Application Delivery\
**Created:** [October 1, 2015, 9:49am UTC](https://community.a10networks.com/t/draining-a-virtual-service/333 "2015-10-01T09:49:35Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![lcameron\_westernpower.co.uk](https://avatars.discourse-cdn.com/v4/letter/l/f07891/32.png) [@lcameron\_westernpower.co.uk](https://community.a10networks.com/u/lcameron_westernpower.co.uk)\
**Post date:** [October 1, 2015, 9:49am UTC](https://community.a10networks.com/t/draining-a-virtual-service/333/1 "2015-10-01T09:49:35Z")

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Hi All,  
I am setting a A10 vThunder running 4.01 for a Oracle forms instance… the DBA team would like to drain the virtual service for when a maintenance window takes place. I have looked in to the Graceful shutdown either I’m not configuring it right or some thing else is happening because if I disable a server it just chops the connection.

Any help on this would be great…  
A Fellow A10 user!

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**Author:** ![dshin](https://avatars.discourse-cdn.com/v4/letter/d/f05b48/32.png) [@dshin](https://community.a10networks.com/u/dshin)\
**Post date:** [October 1, 2015, 5:12pm UTC](https://community.a10networks.com/t/draining-a-virtual-service/333/2 "2015-10-01T17:12:44Z")

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Hi,

A few things to check as to why the graceful shutdown does not apply:

1. Have you check your graceful shutdown grace time settings. This feature can be set to “1-86400 seconds” range.

2. In order for the graceful shutdown to work, you must have at least 2 servers in the service group.

3. Also what type of load balancing methods have you configured. If source-I  
P-based or destination-IP-based hashing is configured then I will not work.  
Also what ACOS build have you installed?

Genard