2020-06-15T18:56:29.734+0300 I REPL [replexec-6] Member Isis.local:27017 is now in state RS_DOWN
2020-06-15T18:56:29.734+0300 I REPL [replexec-6] Member osiris.local:27017 is now in state RS_DOWN
2020-06-15T18:56:29.735+0300 I REPL [replexec-6] can't see a majority of the set, relinquishing primary
2020-06-15T18:56:29.735+0300 I REPL [replexec-6] Stepping down from primary in response to heartbeat
2020-06-15T18:56:29.735+0300 I REPL [replexec-6] transition to SECONDARY from PRIMARY
2020-06-15T18:56:29.735+0300 I NETWORK [replexec-6] Skip closing connection for connection # 40
2020-06-15T18:56:29.735+0300 I NETWORK [replexec-6] Skip closing connection for connection # 35
2020-06-15T18:56:29.735+0300 I REPL [replexec-0] Member osiris.local:27017 is now in state SECONDARY
2020-06-15T18:56:29.735+0300 I REPL [replexec-1] Member Isis.local:27017 is now in state ARBITER

...

2020-06-15T18:56:30.236+0300 I REPL [replexec-1] Member osiris.local:27017 is now in state PRIMARY

...

2020-06-15T18:56:31.225+0300 I REPL [rsBackgroundSync] sync source candidate: osiris.local:27017
2020-06-15T18:56:31.227+0300 I REPL [rsBackgroundSync] Changed sync source from empty to osiris.local:27017
2020-06-15T18:56:31.227+0300 I ASIO [RS] Connecting to osiris.local:27017

...

2020-06-15T18:57:29.753+0300 I REPL [replexec-0] Starting an election, since we've seen no PRIMARY in the past 10000ms
2020-06-15T18:57:29.753+0300 I REPL [replexec-0] conducting a dry run election to see if we could be elected. current term: 1136
2020-06-15T18:57:29.754+0300 I ASIO [Replication] Connecting to Isis.local:27017
2020-06-15T18:57:29.754+0300 I ASIO [Replication] Connecting to osiris.local:27017
2020-06-15T18:57:29.754+0300 I REPL [replexec-1] VoteRequester(term 1136 dry run) received a no vote from Isis.local:27017 with reason "can see a healthy primary (osiris.local:27017) of equal or greater priority"; response message: \{ term: 1136, voteGranted: false, reason: "can see a healthy primary (osiris.local:27017) of equal or greater priority", ok: 1.0 }
2020-06-15T18:57:29.754+0300 I REPL [replexec-0] VoteRequester(term 1136 dry run) received a yes vote from osiris.local:27017; response message: \{ term: 1136, voteGranted: true, reason: "", ok: 1.0, operationTime: Timestamp(1592236637, 1), $clusterTime: { clusterTime: Timestamp(1592236637, 1), signature: { hash: BinData(0, 0000000000000000000000000000000000000000), keyId: 0 } } }
2020-06-15T18:57:29.754+0300 I REPL [replexec-0] dry election run succeeded, running for election in term 1137
2020-06-15T18:57:29.755+0300 I REPL [replexec-6] VoteRequester(term 1137) received a no vote from Isis.local:27017 with reason "can see a healthy primary (osiris.local:27017) of equal or greater priority"; response message: \{ term: 1137, voteGranted: false, reason: "can see a healthy primary (osiris.local:27017) of equal or greater priority", ok: 1.0 }
2020-06-15T18:57:29.759+0300 I REPL [replexec-1] VoteRequester(term 1137) received a yes vote from osiris.local:27017; response message: \{ term: 1137, voteGranted: true, reason: "", ok: 1.0, operationTime: Timestamp(1592236637, 1), $clusterTime: { clusterTime: Timestamp(1592236637, 1), signature: { hash: BinData(0, 0000000000000000000000000000000000000000), keyId: 0 } } }
2020-06-15T18:57:29.759+0300 I REPL [replexec-1] election succeeded, assuming primary role in term 1137
2020-06-15T18:57:29.760+0300 I REPL [replexec-1] transition to PRIMARY from SECONDARY
2020-06-15T18:57:29.760+0300 I REPL [replexec-1] Resetting sync source to empty, which was osiris.local:27017
2020-06-15T18:57:29.760+0300 I REPL [replexec-1] Entering primary catch-up mode.
2020-06-15T18:57:29.761+0300 I REPL [replexec-0] Member osiris.local:27017 is now in state SECONDARY
2020-06-15T18:57:29.761+0300 I REPL [replexec-0] Caught up to the latest optime known via heartbeats after becoming primary. Target optime: \{ ts: Timestamp(1592236637, 1), t: 1136 }. My Last Applied: \{ ts: Timestamp(1592236637, 1), t: 1136 }
2020-06-15T18:57:29.761+0300 I REPL [replexec-0] Exited primary catch-up mode.
2020-06-15T18:57:29.761+0300 I REPL [replexec-0] Stopping replication producer
2020-06-15T18:57:29.761+0300 I REPL [ReplBatcher] Oplog buffer has been drained in term 1137
2020-06-15T18:57:29.761+0300 I REPL [rsBackgroundSync] Replication producer stopped after oplog fetcher finished returning a batch from our sync source. Abandoning this batch of oplog entries and re-evaluating our sync source.
2020-06-15T18:57:29.761+0300 I CONNPOOL [RS] Ending connection to host osiris.local:27017 due to bad connection status; 1 connections to that host remain open
2020-06-15T18:57:29.767+0300 I REPL [rsSync-0] transition to primary complete; database writes are now permitted

...

2020-06-15T18:58:29.734+0300 I REPL [replexec-7] Member Isis.local:27017 is now in state RS_DOWN
2020-06-15T18:58:29.735+0300 I REPL [replexec-7] Member osiris.local:27017 is now in state RS_DOWN
2020-06-15T18:58:29.735+0300 I REPL [replexec-7] can't see a majority of the set, relinquishing primary
2020-06-15T18:58:29.735+0300 I REPL [replexec-7] Stepping down from primary in response to heartbeat
2020-06-15T18:58:29.735+0300 I REPL [replexec-7] transition to SECONDARY from PRIMARY