Couchbase node becomes unresponsive

Hi,
I am evaluating Couchbase community version 6.0.0-1693 with 3 nodes in kubernetes. One of the couchbase node becomes unresponsive but pod can be accessible. Dashboard login was working but buckets were not readable until to make that node as failover.

[ns_server:info,2020-10-08T19:25:57.331Z,babysitter_of_ns_1@127.0.0.1:<0.290.0>:ns_port_server:log:223]memcached<0.290.0>: 2020-10-08T19:25:57.090340+00:00 WARNING 93: conn_read_packet_header - tryReadNetwork returned SocketError - closing connection [ 10.233.98.181:50748 - 10.233.102.38:11210 (@cbq-engine) ]
memcached<0.290.0>: 2020-10-08T19:25:57.090353+00:00 WARNING 96: conn_read_packet_header - tryReadNetwork returned SocketError - closing connection [ 10.233.98.181:44964 - 10.233.102.38:11210 (@cbq-engine) ]

dial tcp 127.0.0.1:8091: getsockopt: connection refused\n2020-10-08T19:27:56.713Z INFO GOXDCR.InternalSettingChangeListener: metakv.RunObserveChildren (InternalSettingsChangeListener) failed after max retry 4\n2020-10-08T19:27:56.713Z INFO GOXDCR.GlobalSettingChangeListener: metakv.RunObserveChildren (GlobalSettingChangeListener) failed after max retry 4\n2020-10-08T19:27:56.713Z INFO GOXDCR.ReplMgr: Replication manager is exiting…\n2020-10-08T19:27:56.713Z INFO GOXDCR.ReplMgr: Replication manager is already in the processof stopping, no-op on this stop request\n2020-10-08T19:27:56.713Z INFO GOXDCR.ReplicationSpecChangeListener: metakv.RunObserveChildren failed, err=Get http://127.0.0.1:8091/_metakv/replicationSpec/?feed=continuous: dial tcp 127.0.0.1:8091: getsockopt: connection refused\n2020-10-08T19:27:56.713Z INFO GOXDCR.ReplicationSpecChangeListener: metakv.RunObserveChildren (ReplicationSpecChangeListener) failed after max retry 4\n">>,
1356}]}},
goxdcr,undefined,,0}
** Reason for termination ==
** {abnormal,0}