Cannot delete a web application

Question

I am trying to delete a web application in my SharePoint 2013 environment. The first attempt deleted the database, the application pool, the IIS site... But the I got an error saying

An object of the type Microsoft.SharePoint.Administration.SPIisWebsiteUnprovisioningJobDefinition named "Unprovisioning Webapplication" already exists under the parent Microsoft.SharePoint.Administration.SPWebService named "". Rename your object or delete the existing object.

So I deleted the corresponding jobs, as I have seen in other blogs and questions, and then tried to delete the web application once again. This time I get this error:

An object in the SharePoint administrative framework, "SPWebApplication Name=Webapplication", could not be deleted because other objects depend on it. Update all of these dependants to point to null or different objects and retry this operation. The dependant objects are as follows:

However, there are no dependencies being displayed in the message. The logs don't provide any information either.

UPDATE: This web application had 3 site collections on it:

/

/Sites/A

/Sites/B

Where the first and second site collections had 1 shared database, and the last one had a separate database. All site collections and all databases are deleted though.

Answer 1

looks like you have some kind of solution deployed to this web app. you should check this

• Go to Central Administration>Operations>Solution Management .Here you can check whether there are any solutions deployed on the web application. if there is any, please remove it from the web app.
• from central admin check if there is any timer job running for the web app.
• Restart the SharePoint timer services and sharepoint admin services on all servers.
• Now try to remove it with powershell using -force switch.