I have a ps1 script that deploys all of my webparts. I started noticing an error (Error 503 service unavailable) after running Update-SPSolution. What is happening is that when I upgrade all my webparts, the application pools for all SharePoint web applications stop. It also takes about 12 minutes per web part to deploy (which seems like forever - it looks like it may be running them all in parallel). Could someone shed some light as to what the best way is to upgrade web parts using Update-SPSolution. Optimally, I would like my script to stop while it fully completes an upgrade on a particular web part, and then move on the next one when it is finished. Thoughts?
SPSolution has a JobExists property that you can check in a while loop.
I would recommend throwing in a timeout in your while loop for good measure, to be safe:
Below is an example with Uninstall-SPSolution but it should work with upgrade as well, since both involve timer jobs