Query engine crushing very offen

Couchbase Server
1

Hi. We have couchbase 6.6.0 community edition and in some of our couchbase nodes we have problem.
In node 01 our cbq-engine crushing every day. We checked logs and didnt find any clue - can you please help ?

Coz im new user - i cant upload files here.

2

here is logs from Query.log and Error.log from that node.