Getting 503 error while deploying application

May be the issue with timeout. For importing of a large Application ZIP it will take some extra time comparing with small application zip.
In Appian install guide recommends we set this timeout to 300 ,Can you change it to 3600 and try once.

Thanks

What version of Appian are you on? I believe this is a known issue in some versions. Generally the import completes on the backend eventually, which seems to be what you observed since the news post was ultimately populated.

This is a know issue for starting from 7.x when Appian moved the applications to /design experience.

This error occurs when the /design front end times out waiting for a response from the server, this can be any activity like Application/patch deployment, opening appian objects. 

The duration for the timeout depends on the lowest value of timeout configured on any of the systems/layers between the user and Appian server

1. User's local network or Proxy server
2. Load balancer layer (if present)
3. Webserver layer
4. Application server layer

To over come this issue, 

1. Make sure that the timeout values in the layers are set to optimal levels (not too high as well) -- OR --
2. Make the deployments in smaller packages

Thanks,

Raghu

Hi Parag,
Please go through the following link and it should help you, docs.appian.com/.../Application_Deployment_Guidelines.html .
Thanks
Yeswanth.