Hi!
MongoDB server: 3.6.18 on Amazon Linux.
Since I changed the featureCompatibilityVersion from 3.4 to 3.6, killing cursors occurs every day from 1:30 to 1:40 AM. This cursors is still in use. It does not occur after reverting featureCompatibilityVersion is returned to 3.4.
Could you please help me with the cause of this or how to investigate it?
log:
2021-01-26T01:28:44.855+0900 I NETWORK [LogicalSessionCacheRefresh] Starting new replica set monitor for myDatabase/host1:27017,host2:27017,host3:27017,host4:27017
2021-01-26T01:33:44.728+0900 I NETWORK [LogicalSessionCacheRefresh] Starting new replica set monitor for myDatabase/host1:27017,host2:27017,host3:27017,host4:27017
2021-01-26T01:33:44.731+0900 I NETWORK [LogicalSessionCacheRefresh] Starting new replica set monitor for myDatabase/host1:27017,host2:27017,host3:27017,host4:27017
2021-01-26T01:33:44.829+0900 I NETWORK [LogicalSessionCacheRefresh] Starting new replica set monitor for myDatabase/host1:27017,host2:27017,host3:27017,host4:27017
2021-01-26T01:33:44.867+0900 I NETWORK [LogicalSessionCacheRefresh] Starting new replica set monitor for myDatabase/host1:27017,host2:27017,host3:27017,host4:27017
2021-01-26T01:33:44.988+0900 I QUERY [LogicalSessionCacheRefresh] killing cursor: 472019555519 as part of killing session(s)
2021-01-26T01:33:45.013+0900 I QUERY [LogicalSessionCacheRefresh] killing cursor: 469763608847 as part of killing session(s)
2021-01-26T01:33:45.037+0900 I QUERY [LogicalSessionCacheRefresh] killing cursor: 472112153951 as part of killing session(s)
2021-01-26T01:33:45.062+0900 I QUERY [LogicalSessionCacheRefresh] killing cursor: 469158404639 as part of killing session(s)
2021-01-26T01:33:45.086+0900 I QUERY [LogicalSessionCacheRefresh] killing cursor: 471725694831 as part of killing session(s)
2021-01-26T01:33:45.111+0900 I QUERY [LogicalSessionCacheRefresh] killing cursor: 469507688159 as part of killing session(s)
2021-01-26T01:33:45.136+0900 I QUERY [LogicalSessionCacheRefresh] killing cursor: 468475652639 as part of killing session(s)
2021-01-26T01:33:45.160+0900 I QUERY [LogicalSessionCacheRefresh] killing cursor: 471668373743 as part of killing session(s)