Problem Description
Being a SharePoint developer I can assume all of us might have faced this issue some or the other time during our Development. The SharePoint application pool is getting stopped frequently. To solve this we manually go to IIS and restart the same but still it won’t help.
Here I will describe you how to fix this issue.
Cause
This generally happens when we update the account credentials which is running this application pool and it is taking time to reflect this new credentials.
Solution
Below is the one liner command which will help you to update this credentials everywhere manually and instantly.
STSADM.EXE -o updatefarmcredentials -userlogin <Account Name> -password <Account Password>
For e.g. STSADM.EXE -o updatefarmcredentials -userlogin Local\Administrator -password Pass@word
For more details about this command you can check this MSDN link.