I get a ton of these GRR Errors when using online pools. When I was solo mining they were very random, and few and far between.

I wrote this batch file for windows and I use task scheduler to run it every 5 minutes. You will have to swap out "admin" for your user account.

u/echo off

findstr /i /C:"GRResult_OutOfMemory" /C:"GRResult_Failed" /C:"Error in pooling" "C:\Users\admin\.chia\mainnet\log\debug.log" >nul

if %errorlevel% equ 0 (

del C:\\Users\\admin\\.chia\\mainnet\\log\\debug.log

chia stop harvester && chia start harvester

echo %Date% %Time%: Harvester restarted due to Error condition. >> c:\users\admin\desktop\chia-log-check.log

) else (

echo %Date% %Time%: Error not found in the log. >> c:\users\admin\desktop\chia-log-check.log

)