[ES6 upgrade ES7] The two-node cluster works normally, but the master node fails, the slave node tries to reconnect, and does not recommend itself as the new master node

续上
[2019-10-30T10:36:08,674][WARN ][o.e.c.c.ClusterFormationFailureHelper] [node_20.23.72.15] master not discovered or elected yet, an election requires a node with id [pyKYCHjPQLGcM3EwI_Dc8A], have discovered [{node_20.23.72.15}{JaQ87iQpS0qLomhZvl-tPQ}{V_vcpdirTYeeRRz9xKmjlg}{20.23.72.15}{20.23.72.15:27336}{dim}] which is not a quorum; discovery will continue using from hosts providers and [{node_20.23.72.15}{JaQ87iQpS0qLomhZvl-tPQ}{V_vcpdirTYeeRRz9xKmjlg}{20.23.72.15}{20.23.72.15:27336}{dim}] from last-known cluster state; node term 10, last-accepted version 528 in term 10
[2019-10-30T10:36:10,781][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node_20.23.72.15] no known master node, scheduling a retry
[2019-10-30T10:36:10,789][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node_20.23.72.15] no known master node, scheduling a retry
[2019-10-30T10:36:11,005][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node_20.23.72.15] no known master node, scheduling a retry
[2019-10-30T10:36:11,006][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node_20.23.72.15] no known master node, scheduling a retry
[2019-10-30T10:36:11,006][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node_20.23.72.15] no known master node, scheduling a retry
[2019-10-30T10:36:11,007][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node_20.23.72.15] no known master node, scheduling a retry
[2019-10-30T10:36:18,676][WARN ][o.e.c.c.ClusterFormationFailureHelper] [node_20.23.72.15] master not discovered or elected yet, an election requires a node with id [pyKYCHjPQLGcM3EwI_Dc8A], have discovered [{node_20.23.72.15}{JaQ87iQpS0qLomhZvl-tPQ}{V_vcpdirTYeeRRz9xKmjlg}{20.23.72.15}{20.23.72.15:27336}{dim}] which is not a quorum; discovery will continue using from hosts providers and [{node_20.23.72.15}{JaQ87iQpS0qLomhZvl-tPQ}{V_vcpdirTYeeRRz9xKmjlg}{20.23.72.15}{20.23.72.15:27336}{dim}] from last-known cluster state; node term 10, last-accepted version 528 in term 10
[2019-10-30T10:36:28,678][WARN ][o.e.c.c.ClusterFormationFailureHelper] [node_20.23.72.15] master not discovered or elected yet, an election requires a node with id [pyKYCHjPQLGcM3EwI_Dc8A], have discovered [{node_20.23.72.15}{JaQ87iQpS0qLomhZvl-tPQ}{V_vcpdirTYeeRRz9xKmjlg}{20.23.72.15}{20.23.72.15:27336}{dim}] which is not a quorum; discovery will continue using from hosts providers and [{node_20.23.72.15}{JaQ87iQpS0qLomhZvl-tPQ}{V_vcpdirTYeeRRz9xKmjlg}{20.23.72.15}{20.23.72.15:27336}{dim}] from last-known cluster state; node term 10, last-accepted version 528 in term 10
[2019-10-30T10:36:28,688][WARN ][o.e.n.Node ] [node_20.23.72.15] timed out while waiting for initial discovery state - timeout: 30s
[2019-10-30T10:36:28,702][INFO ][o.e.h.AbstractHttpServerTransport] [node_20.23.72.15] publish_address {20.23.72.15:9200}, bound_addresses {20.23.72.15:9200}
[2019-10-30T10:36:28,702][INFO ][o.e.n.Node ] [node_20.23.72.15] started
[2019-10-30T10:36:31,776][DEBUG][o.e.a.a.c.s.TransportClusterStateAction] [node_20.23.72.15] no known master node, scheduling a retry
[2019-10-30T10:36:38,680][WARN ][o.e.c.c.ClusterFormationFailureHelper] [node_20.23.72.15] master not discovered or elected yet, an election requires a node with id [pyKYCHjPQLGcM3EwI_Dc8A], have discovered [{node_20.23.72.15}{JaQ87iQpS0qLomhZvl-tPQ}{V_vcpdirTYeeRRz9xKmjlg}{20.23.72.15}{20.23.72.15:27336}{dim}] which is not a quorum; discovery will continue using from hosts providers and [{node_20.23.72.15}{JaQ87iQpS0qLomhZvl-tPQ}{V_vcpdirTYeeRRz9xKmjlg}{20.23.72.15}{20.23.72.15:27336}{dim}] from last-known cluster state; node term 10, last-accepted version 528 in term 10
[2019-10-30T10:36:38,889][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node_20.23.72.15] no known master node, scheduling a retry
[2019-10-30T10:36:38,890][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node_20.23.72.15] no known master node, scheduling a retry
[2019-10-30T10:36:38,891][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node_20.23.72.15] no known master node, scheduling a retry
[2019-10-30T10:36:38,891][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node_20.23.72.15] no known master node, scheduling a retry
[2019-10-30T10:36:48,682][WARN ][o.e.c.c.ClusterFormationFailureHelper] [node_20.23.72.15] master not discovered or elected yet, an election requires a node with id [pyKYCHjPQLGcM3EwI_Dc8A], have discovered [{node_20.23.72.15}{JaQ87iQpS0qLomhZvl-tPQ}{V_vcpdirTYeeRRz9xKmjlg}{20.23.72.15}{20.23.72.15:27336}{dim}] which is not a quorum; discovery will continue using from hosts providers and [{node_20.23.72.15}{JaQ87iQpS0qLomhZvl-tPQ}{V_vcpdirTYeeRRz9xKmjlg}{20.23.72.15}{20.23.72.15:27336}{dim}] from last-known cluster state; node term 10, last-accepted version 528 in term 10
[2019-10-30T10:36:58,683][WARN ][o.e.c.c.ClusterFormationFailureHelper] [node_20.23.72.15] master not discovered or elected yet, an election requires a node with id [pyKYCHjPQLGcM3EwI_Dc8A], have discovered [{node_20.23.72.15}{JaQ87iQpS0qLomhZvl-tPQ}{V_vcpdirTYeeRRz9xKmjlg}{20.23.72.15}{20.23.72.15:27336}{dim}] which is not a quorum; discovery will continue using from hosts providers and [{node_20.23.72.15}{JaQ87iQpS0qLomhZvl-tPQ}{V_vcpdirTYeeRRz9xKmjlg}{20.23.72.15}{20.23.72.15:27336}{dim}] from last-known cluster state; node term 10, last-accepted version 528 in term 10
[2019-10-30T10:37:01,780][DEBUG][o.e.a.a.c.s.TransportClusterStateAction] [node_20.23.72.15] timed out while retrying [cluster:monitor/state] after failure (timeout [30s])
[2019-10-30T10:37:01,797][DEBUG][o.e.a.a.c.s.TransportClusterStateAction] [node_20.23.72.15] no known master node, scheduling a retry
[2019-10-30T10:37:08,685][WARN ][o.e.c.c.ClusterFormationFailureHelper] [node_20.23.72.15] master not discovered or elected yet, an election requires a node with id [pyKYCHjPQLGcM3EwI_Dc8A], have discovered [{node_20.23.72.15}{JaQ87iQpS0qLomhZvl-tPQ}{V_vcpdirTYeeRRz9xKmjlg}{20.23.72.15}{20.23.72.15:27336}{dim}] which is not a quorum; discovery will continue using from hosts providers and [{node_20.23.72.15}{JaQ87iQpS0qLomhZvl-tPQ}{V_vcpdirTYeeRRz9xKmjlg}{20.23.72.15}{20.23.72.15:27336}{dim}] from last-known cluster state; node term 10, last-accepted version 528 in term 10
[2019-10-30T10:37:10,789][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node_20.23.72.15] timed out while retrying [indices:admin/create] after failure (timeout [1m])
[2019-10-30T10:37:10,790][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node_20.23.72.15] timed out while retrying [indices:admin/create] after failure (timeout [1m])
[2019-10-30T10:37:11,007][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node_20.23.72.15] timed out while retrying [indices:admin/create] after failure (timeout [1m])