Application pool getting crashed frequently. Frame work 4.7.2 & Windows 2016 server

Question

Team - I am getting error 'The Service Unavailable' error while invoking my WCF service hosted in the Windows 2016 server. I found that application pool is stopped and restarted. I am able to browse the url after the restart but going down while invoking from an application. I found the the below error in the event viewer. Please help us to get rid of the issue.

Faulting application name: w3wp.exe, version: 10.0.17763.1, time stamp: 0xa7ccada2

Faulting module name: clr.dll, version: 4.7.3690.0, time stamp: 0x5f2a0938

Exception code: 0xc00000fd

Fault offset: 0x004558ed

Faulting process id: 0x2b0c

Faulting application start time: 0x01d6d5c7745efdf3

Faulting application path: C:\Windows\SysWOW64\inetsrv\w3wp.exe

Faulting module path: C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll

Report Id: 3898caaa-0a15-4b08-b417-bd99ef01c90b

Faulting package full name:

Faulting package-relative application ID: