"0x80040E14" or "HTTP 500" error message or Site Owner cannot edit\add content to their site

We have 2 web applications[Web App1, Web App2] running in our farm. Issue was that one Site Owner within Web App1 couldn't add or modify their content. Further investigation revealed that all sites within Web App1 threw an error like ""0x80040E14" while trying to add new content or "HTTP 500" error while trying to modify content. Web App2 was working fine. At least that part was good.

Googled the issue; Check the Database associated with the farm. You can get details about your SQL Server database used by your farm from your Central Admin.

• Connect to the Server to check the space. 
• OR use SQL Server Management Studio to connect to the SQL Server from your Sharepoint Server. 

When you connect through the SQL Server Management Studio, Expand Databases and look for WSS_WebAPP1_Content[ the content database used by the Web Application that has trouble]. Right Click and look for Properties. you can get an idea about the space available. In my case this was low. 

Request your SQL Server administrator to increase the server space and Reboot. 

Issue was fixed. This link was very helpful.

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