High CPU usage and wdlog.log file full with "retry create previews"

Hi community
My EX2 Ultra is running with high CPU usage (80% to 100%) with constantly disk access.
This is not due to the indexation which is finished for many weeks. The main dashboard shows the cloud is “connected” with no more information.
When I look at the log file, I can see the wdlog.log file is full of messages like this :
2021-09-25T10:27:46.811610+02:00 di=GYL5HVQrtb info restsdk[13006]: {“attempt”:2,“corid”:“rrp:9veWkkniXuFU2JU1CJp7”,“file”:“resize.go”,“fileID”:“tsaz2u7nqgyaldqyrtkbcqmp”,“fn”:“(*CachingResizer).runPending.func1”,“gitTime”:1630441855,“githash”:“c4b4dc0”,“importPath”:“in
ternal/trans/resize”,“line”:1213,“msgid”:“retry create previews”}

This message is repeated with the same fileID.
What is wrong with this file ? How can I fix it ?

Thanks for your help and regards
Franck

Hi @FRANCK_BONNEFOY,

Please refer to this KB article: My Cloud OS 5: High CPU Usage and Slow Response Times After Update

Hi @Neha_07

My issue is not due to an update. The update was made many weeks ago and my NAS was working fine afterwards.

This is a process that is running non-stop and is logging every 5 min the same message. I just need to understand why.

Thanks
Franck