Linux,  MongoDB

配置MongoDB replication遇到的坑

2022年6月2日 /

一背景说明

两个Linux服务器，想配置成replication架构的MongoDB。反反复复，死活不成功。

二 故障重现和分析解决

0 2台机器信息如下

IP地址角色hostname
172.16.17.8mongoprimaryguoxin8
172.16.19.110mongostandbylocalhost

1 每台机器上已经安装MongoDB

安装路径都在/root/3.4.6/下，可以通过/root/3.4.6/mongod直接启动MongoDB。

[root@localhost 3.4.6]# pwd
/root/3.4.6
[root@localhost 3.4.6]# ll
总用量 253628
-rwxr-xr-x 1 root root 29870760 6月   2 11:39 mongo
-rwxr-xr-x 1 root root 54389832 6月   2 11:40 mongod
-rwxr-xr-x 1 root root 12744868 6月   2 11:40 mongodump
-rwxr-xr-x 1 root root 10756395 6月   2 11:40 mongoexport
-rwxr-xr-x 1 root root 10639650 6月   2 11:40 mongofiles
-rwxr-xr-x 1 root root 10914443 6月   2 11:40 mongoimport
-rwxr-xr-x 1 root root 10407075 6月   2 11:40 mongooplog
-rwxr-xr-x 1 root root 53753832 6月   2 11:40 mongoperf
-rwxr-xr-x 1 root root 14100552 6月   2 11:40 mongorestore
-rwxr-xr-x 1 root root 30539424 6月   2 11:40 mongos
-rwxr-xr-x 1 root root 10972416 6月   2 11:40 mongostat
-rwxr-xr-x 1 root root 10604661 6月   2 11:40 mongotop
[root@localhost 3.4.6]#

2 每台机器已经创建配置文件

[root@localhost 3.4.6]# cat /etc/mongodb.conf 
dbpath=/data/mongodb/data
logpath=/data/mongodb/log/mongodb.log
logappend=true
port=27017
fork=true
#这里指定replicaset为rs0,如果是配置单实例MongoDB，则注释掉该选项即可
replSet=rs0
#bind_ip = 0.0.0.0
#bind_ip = 127.0.0.1
#bind_ip_all=true
#这里暂时指定MongoDB不需要验证即可登录，需要的话，则反注释，并重启MongoDB
#auth=true
[root@localhost 3.4.6]#

3 每台机器上已经创建指定路径

[root@localhost 3.4.6]# ll /data/mongodb
总用量 0
drwxr-xr-x 2 root root 6 6月   2 17:39 data
drwxr-xr-x 2 root root 6 6月   2 17:39 log
[root@localhost 3.4.6]#

4 mongoprimary上启动MongoDB

[root@guoxin8 ~]# /root/3.4.6/mongod -f /etc/mongodb.conf 
about to fork child process, waiting until server is ready for connections.
forked process: 19749
child process started successfully, parent exiting
[root@guoxin8 ~]#

5 mongostandby上启动MongoDB

[root@localhost ~]# /root/3.4.6/mongod -f /etc/mongodb.conf 
about to fork child process, waiting until server is ready for connections.
forked process: 15956
child process started successfully, parent exiting
[root@localhost ~]#

6 mongoprimary上执行rs.initiate()

[root@guoxin8 ~]# /root/3.4.6/mongo
MongoDB shell version v3.4.6
connecting to: mongodb://127.0.0.1:27017
MongoDB server version: 3.4.6
Server has startup warnings: 
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] 
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] 
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] 
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] 
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] 
> rs.status()
{
        "info" : "run rs.initiate(...) if not yet done for the set",
        "ok" : 0,
        "errmsg" : "no replset config has been received",
        "code" : 94,
        "codeName" : "NotYetInitialized"
}
> rs.initiate()
{
        "info2" : "no configuration specified. Using a default configuration for the set",
        "me" : "guoxin8:27017",
        "ok" : 1
}
rs0:SECONDARY> 
rs0:PRIMARY> 
rs0:PRIMARY>

截止到现在，上述所有的操作都是没有任何问题的。接下来，当我添加副本集的时候，就会有问题了。

7 mongoprimary上执行rs.add()

[root@guoxin8 ~]# /root/3.4.6/mongo
MongoDB shell version v3.4.6
connecting to: mongodb://127.0.0.1:27017
MongoDB server version: 3.4.6
Server has startup warnings: 
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] 
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] 
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] 
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] 
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2022-06-02T17:50:56.162+0800 I CONTROL  [initandlisten] 
> rs.status()
{
        "info" : "run rs.initiate(...) if not yet done for the set",
        "ok" : 0,
        "errmsg" : "no replset config has been received",
        "code" : 94,
        "codeName" : "NotYetInitialized"
}
> rs.initiate()
{
        "info2" : "no configuration specified. Using a default configuration for the set",
        "me" : "guoxin8:27017",
        "ok" : 1
}
rs0:SECONDARY> 
rs0:PRIMARY> 
rs0:PRIMARY> rs.add("172.16.19.110:27017");
{ "ok" : 1 }
rs0:PRIMARY> 
rs0:PRIMARY> rs.status()
{
        "set" : "rs0",
        "date" : ISODate("2022-06-02T09:53:47.745Z"),
        "myState" : 1,
        "term" : NumberLong(1),
        "heartbeatIntervalMillis" : NumberLong(2000),
        "optimes" : {
                "lastCommittedOpTime" : {
                        "ts" : Timestamp(1654163617, 1),
                        "t" : NumberLong(1)
                },
                "appliedOpTime" : {
                        "ts" : Timestamp(1654163619, 1),
                        "t" : NumberLong(1)
                },
                "durableOpTime" : {
                        "ts" : Timestamp(1654163619, 1),
                        "t" : NumberLong(1)
                }
        },
        "members" : [
                {
                        "_id" : 0,
                        "name" : "guoxin8:27017",
                        "health" : 1,
                        "state" : 1,
                        "stateStr" : "PRIMARY",
                        "uptime" : 172,
                        "optime" : {
                                "ts" : Timestamp(1654163619, 1),
                                "t" : NumberLong(1)
                        },
                        "optimeDate" : ISODate("2022-06-02T09:53:39Z"),
                        "electionTime" : Timestamp(1654163495, 1),
                        "electionDate" : ISODate("2022-06-02T09:51:35Z"),
                        "configVersion" : 2,
                        "self" : true
                },
                {
                        "_id" : 1,
                        "name" : "172.16.19.110:27017",
                        "health" : 1,
                        "state" : 0,
                        "stateStr" : "STARTUP",
                        "uptime" : 8,
                        "optime" : {
                                "ts" : Timestamp(0, 0),
                                "t" : NumberLong(-1)
                        },
                        "optimeDurable" : {
                                "ts" : Timestamp(0, 0),
                                "t" : NumberLong(-1)
                        },
                        "optimeDate" : ISODate("1970-01-01T00:00:00Z"),
                        "optimeDurableDate" : ISODate("1970-01-01T00:00:00Z"),
                        "lastHeartbeat" : ISODate("2022-06-02T09:53:47.536Z"),
                        "lastHeartbeatRecv" : ISODate("1970-01-01T00:00:00Z"),
                        "pingMs" : NumberLong(1),
                        "configVersion" : -2
                }
        ],
        "ok" : 1
}
rs0:PRIMARY> 
> rs.status()
2022-06-02T17:53:57.789+0800 I NETWORK  [thread1] trying reconnect to 127.0.0.1:27017 (127.0.0.1) failed
2022-06-02T17:53:57.789+0800 I NETWORK  [thread1] reconnect 127.0.0.1:27017 (127.0.0.1) ok
{
        "set" : "rs0",
        "date" : ISODate("2022-06-02T09:53:57.790Z"),
        "myState" : 2,
        "term" : NumberLong(1),
        "heartbeatIntervalMillis" : NumberLong(2000),
        "optimes" : {
                "lastCommittedOpTime" : {
                        "ts" : Timestamp(1654163617, 1),
                        "t" : NumberLong(1)
                },
                "appliedOpTime" : {
                        "ts" : Timestamp(1654163619, 1),
                        "t" : NumberLong(1)
                },
                "durableOpTime" : {
                        "ts" : Timestamp(1654163619, 1),
                        "t" : NumberLong(1)
                }
        },
        "members" : [
                {
                        "_id" : 0,
                        "name" : "guoxin8:27017",
                        "health" : 1,
                        "state" : 2,
                        "stateStr" : "SECONDARY",
                        "uptime" : 182,
                        "optime" : {
                                "ts" : Timestamp(1654163619, 1),
                                "t" : NumberLong(1)
                        },
                        "optimeDate" : ISODate("2022-06-02T09:53:39Z"),
                        "infoMessage" : "could not find member to sync from",
                        "configVersion" : 2,
                        "self" : true
                },
                {
                        "_id" : 1,
                        "name" : "172.16.19.110:27017",
                        "health" : 1,
                        "state" : 0,
                        "stateStr" : "STARTUP",
                        "uptime" : 8,
                        "optime" : {
                                "ts" : Timestamp(0, 0),
                                "t" : NumberLong(-1)
                        },
                        "optimeDurable" : {
                                "ts" : Timestamp(0, 0),
                                "t" : NumberLong(-1)
                        },
                        "optimeDate" : ISODate("1970-01-01T00:00:00Z"),
                        "optimeDurableDate" : ISODate("1970-01-01T00:00:00Z"),
                        "lastHeartbeat" : ISODate("2022-06-02T09:53:54.538Z"),
                        "lastHeartbeatRecv" : ISODate("1970-01-01T00:00:00Z"),
                        "pingMs" : NumberLong(1),
                        "configVersion" : -2
                }
        ],
        "ok" : 1
}
>

当我们执行rs.add(“172.16.19.110:27017″);之后，看到当前节点还是primary，没有任何问题。但是，新加的节点172.16.19.110的状态却变成了，”stateStr” : “STARTUP”,。这就不对了，很快，我们再次执行rs.status()时，看到当前primary节点变成了secondary。

要了命了啊，primary变成了secondary，而secondary的状态是STARTUP。整个replication set里没有primary。这怎么用？

折腾了半天，还是从Google那儿找到了点儿线索。

8 具体原因

1 主节点机器里，/etc/hosts文件里的hostname映射的不是127.0.0.1的环路地址；

2 从rs.initiate()命令的结果里，也可以看到提示：

{
        "info2" : "no configuration specified. Using a default configuration for the set",
        "me" : "guoxin8:27017",
        "ok" : 1
}

3 从standby节点的MongoDB 日志里，也看到了类似的提示错误：

[root@localhost 3.4.6]# cat /data/mongodb/log/mongodb.log 
....
2022-06-02T18:02:17.160+0800 I ASIO     [NetworkInterfaceASIO-Replication-0] Connecting to guoxin8:27017
2022-06-02T18:02:27.161+0800 I REPL     [ReplicationExecutor] Error in heartbeat request to guoxin8:27017; ExceededTimeLimit: Couldn't get a connection within the time limit
2022-06-02T18:02:27.172+0800 I ASIO     [NetworkInterfaceASIO-Replication-0] Failed to connect to guoxin8:27017 - HostUnreachable: HostUnreachable
2022-06-02T18:02:27.172+0800 I ASIO     [NetworkInterfaceASIO-Replication-0] Dropping all pooled connections to guoxin8:27017 due to failed operation on a connection
2022-06-02T18:02:29.161+0800 I ASIO     [NetworkInterfaceASIO-Replication-0] Connecting to guoxin8:27017
2022-06-02T18:02:39.162+0800 I REPL     [ReplicationExecutor] Error in heartbeat request to guoxin8:27017; ExceededTimeLimit: Couldn't get a connection within the time limit
2022-06-02T18:02:39.174+0800 I ASIO     [NetworkInterfaceASIO-Replication-0] Failed to connect to guoxin8:27017 - HostUnreachable: HostUnreachable
2022-06-02T18:02:39.174+0800 I ASIO     [NetworkInterfaceASIO-Replication-0] Dropping all pooled connections to guoxin8:27017 due to failed operation on a connection

9 解决办法也很简单

在从节点172.16.19.110机器上的/etc/hosts文件里，添加，guoxin8对应到主节点的IP地址：

[root@localhost ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
​
​
#mongo
172.16.17.8   guoxin8
[root@localhost ~]#

然后，可以看到从节点上的MongoDB日志：

[root@localhost 3.4.6]# tailf  /data/mongodb/log/mongodb.log 
2022-06-02T18:03:41.306+0800 I REPL     [replication-1] Finished fetching oplog during initial sync: CallbackCanceled: Callback canceled. Last fetched optime and hash: { ts: Timestamp 1654163619000|1, t: 1 }[-221148826281795956]
2022-06-02T18:03:41.306+0800 I REPL     [replication-1] Initial sync attempt finishing up.
2022-06-02T18:03:41.306+0800 I REPL     [replication-1] Initial Sync Attempt Statistics: { failedInitialSyncAttempts: 0, maxFailedInitialSyncAttempts: 10, initialSyncStart: new Date(1654164221217), initialSyncAttempts: [], fetchedMissingDocs: 0, appliedOps: 0, initialSyncOplogStart: Timestamp 1654163619000|1, initialSyncOplogEnd: Timestamp 1654163619000|1, databases: { databasesCloned: 1, admin: { collections: 1, clonedCollections: 1, start: new Date(1654164221271), end: new Date(1654164221304), elapsedMillis: 33, admin.system.version: { documentsToCopy: 1, documentsCopied: 1, indexes: 2, fetchedBatches: 1, start: new Date(1654164221272), end: new Date(1654164221304), elapsedMillis: 32 } } } }
2022-06-02T18:03:41.310+0800 I REPL     [replication-1] initial sync done; took 0s.
2022-06-02T18:03:41.310+0800 I REPL     [replication-1] Starting replication fetcher thread
2022-06-02T18:03:41.310+0800 I REPL     [replication-1] Starting replication applier thread
2022-06-02T18:03:41.311+0800 I REPL     [replication-1] Starting replication reporter thread
2022-06-02T18:03:41.311+0800 I REPL     [rsSync] transition to RECOVERING
2022-06-02T18:03:41.311+0800 I REPL     [rsBackgroundSync] could not find member to sync from
2022-06-02T18:03:41.313+0800 I REPL     [rsSync] transition to SECONDARY
2022-06-02T18:03:51.315+0800 I REPL     [ReplicationExecutor] Member guoxin8:27017 is now in state PRIMARY
2022-06-02T18:03:56.317+0800 I REPL     [rsBackgroundSync] sync source candidate: guoxin8:27017
2022-06-02T18:03:56.320+0800 I ASIO     [NetworkInterfaceASIO-RS-0] Connecting to guoxin8:27017
2022-06-02T18:03:56.322+0800 I ASIO     [NetworkInterfaceASIO-RS-0] Successfully connected to guoxin8:27017, took 2ms (2 connections now open to guoxin8:27017)

然后，再次在主节点的mongo shell里，执行rs.status()时，就一切正常了。

> rs.status()
{
        "set" : "rs0",
        "date" : ISODate("2022-06-02T10:07:58.329Z"),
        "myState" : 1,
        "term" : NumberLong(2),
        "heartbeatIntervalMillis" : NumberLong(2000),
        "optimes" : {
                "lastCommittedOpTime" : {
                        "ts" : Timestamp(1654164471, 1),
                        "t" : NumberLong(2)
                },
                "appliedOpTime" : {
                        "ts" : Timestamp(1654164471, 1),
                        "t" : NumberLong(2)
                },
                "durableOpTime" : {
                        "ts" : Timestamp(1654164471, 1),
                        "t" : NumberLong(2)
                }
        },
        "members" : [
                {
                        "_id" : 0,
                        "name" : "guoxin8:27017",
                        "health" : 1,
                        "state" : 1,
                        "stateStr" : "PRIMARY",
                        "uptime" : 1023,
                        "optime" : {
                                "ts" : Timestamp(1654164471, 1),
                                "t" : NumberLong(2)
                        },
                        "optimeDate" : ISODate("2022-06-02T10:07:51Z"),
                        "electionTime" : Timestamp(1654164230, 1),
                        "electionDate" : ISODate("2022-06-02T10:03:50Z"),
                        "configVersion" : 2,
                        "self" : true
                },
                {
                        "_id" : 1,
                        "name" : "172.16.19.110:27017",
                        "health" : 1,
                        "state" : 2,
                        "stateStr" : "SECONDARY",
                        "uptime" : 848,
                        "optime" : {
                                "ts" : Timestamp(1654164471, 1),
                                "t" : NumberLong(2)
                        },
                        "optimeDurable" : {
                                "ts" : Timestamp(1654164471, 1),
                                "t" : NumberLong(2)
                        },
                        "optimeDate" : ISODate("2022-06-02T10:07:51Z"),
                        "optimeDurableDate" : ISODate("2022-06-02T10:07:51Z"),
                        "lastHeartbeat" : ISODate("2022-06-02T10:07:56.445Z"),
                        "lastHeartbeatRecv" : ISODate("2022-06-02T10:07:57.878Z"),
                        "pingMs" : NumberLong(0),
                        "syncingTo" : "guoxin8:27017",
                        "configVersion" : 2
                }
        ],
        "ok" : 1
}
>

三 小结

之前，在Linux上配置MongoDB的replication顺顺利利的。这次，却遇到这个坑。费劲半天，找到了原因。

参考：https://stackoverflow.com/questions/13603096/starting-over-with-replica-configuration-in-mongodb

四 补记

当我在部署另外一套MongoDB replication时，主节点的数据量比较大是，添加从节点之后，会看到备节点的状态为： “stateStr” : “STARTUP2″。此时，我们到备库节点上，看日志，以及看数据路径大小在变化时，说明，replication正在同步数据。等到同步结束之后，状态就变为正常了。

rs0:PRIMARY> rs.status()
{
        "set" : "rs0",
        "date" : ISODate("2022-06-02T10:51:06.074Z"),
        "myState" : 1,
        "term" : NumberLong(1),
        "heartbeatIntervalMillis" : NumberLong(2000),
        "optimes" : {
                "lastCommittedOpTime" : {
                        "ts" : Timestamp(1654166752, 1),
                        "t" : NumberLong(1)
                },
                "appliedOpTime" : {
                        "ts" : Timestamp(1654167063, 1),
                        "t" : NumberLong(1)
                },
                "durableOpTime" : {
                        "ts" : Timestamp(1654167063, 1),
                        "t" : NumberLong(1)
                }
        },
        "members" : [
                {
                        "_id" : 0,
                        "name" : "k8-minion-ident-test2-164:27017",
                        "health" : 1,
                        "state" : 1,
                        "stateStr" : "PRIMARY",
                        "uptime" : 806,
                        "optime" : {
                                "ts" : Timestamp(1654167063, 1),
                                "t" : NumberLong(1)
                        },
                        "optimeDate" : ISODate("2022-06-02T10:51:03Z"),
                        "electionTime" : Timestamp(1654166280, 2),
                        "electionDate" : ISODate("2022-06-02T10:38:00Z"),
                        "configVersion" : 2,
                        "self" : true
                },
                {
                        "_id" : 1,
                        "name" : "172.16.19.110:27017",
                        "health" : 1,
                        "state" : 5,
                        "stateStr" : "STARTUP2",       #状态不正常。
                        "uptime" : 309,
                        "optime" : {
                                "ts" : Timestamp(0, 0),
                                "t" : NumberLong(-1)
                        },
                        "optimeDurable" : {
                                "ts" : Timestamp(0, 0),
                                "t" : NumberLong(-1)
                        },
                        "optimeDate" : ISODate("1970-01-01T00:00:00Z"),
                        "optimeDurableDate" : ISODate("1970-01-01T00:00:00Z"),
                        "lastHeartbeat" : ISODate("2022-06-02T10:51:05.192Z"),
                        "lastHeartbeatRecv" : ISODate("2022-06-02T10:51:04.225Z"),
                        "pingMs" : NumberLong(0),
                        "syncingTo" : "k8-minion-ident-test2-164:27017",
                        "configVersion" : 2
                }
        ],
        "ok" : 1
}
rs0:PRIMARY>

处理完同步之后，会看到备库里有下述类似日志：

2022-06-02T20:38:13.934+0800 I INDEX    [InitialSyncInserters-fdp_bill_uat.t_fdp_bill_reality_bill0]     building index using bulk method; build may temporarily use up to 33 megabytes of RAM
2022-06-02T20:38:13.939+0800 I INDEX    [InitialSyncInserters-fdp_bill_uat.t_fdp_bill_reality_bill0] build index on: fdp_bill_uat.t_fdp_bill_reality_bill properties: { v: 2, key: { _id: 1 }, name: "_id_", ns: "fdp_bill_uat.t_fdp_bill_reality_bill" }
2022-06-02T20:38:13.939+0800 I INDEX    [InitialSyncInserters-fdp_bill_uat.t_fdp_bill_reality_bill0]     building index using bulk method; build may temporarily use up to 500 megabytes of RAM
2022-06-02T20:38:31.967+0800 I REPL     [replication-12] Applying operations until { : Timestamp 1654173503000|1 } before initial sync can complete. (starting at { : Timestamp 1654166756000|1 })
2022-06-02T20:38:32.144+0800 I ASIO     [NetworkInterfaceASIO-RS-0] Ending connection to host k8-minion-ident-test2-164:27017 due to bad connection status; 1 connections to that host remain open
2022-06-02T20:38:32.144+0800 I REPL     [replication-15] Finished fetching oplog during initial sync: CallbackCanceled: Callback canceled. Last fetched optime and hash: { ts: Timestamp 1654173503000|1, t: 1 }[-7280547347428778685]
2022-06-02T20:38:32.144+0800 I REPL     [replication-15] Initial sync attempt finishing up.
....
2022-06-02T20:38:32.148+0800 I REPL     [replication-12] initial sync done; took 6755s.
2022-06-02T20:38:32.148+0800 I REPL     [replication-12] Starting replication fetcher thread
2022-06-02T20:38:32.148+0800 I REPL     [replication-12] Starting replication applier thread
2022-06-02T20:38:32.149+0800 I REPL     [rsBackgroundSync] could not find member to sync from
2022-06-02T20:38:32.149+0800 I REPL     [replication-12] Starting replication reporter thread
2022-06-02T20:38:32.149+0800 I REPL     [rsSync] transition to RECOVERING
2022-06-02T20:38:32.151+0800 I REPL     [rsSync] transition to SECONDARY

参考：https://dba.stackexchange.com/questions/58740/why-is-mongo-stuck-in-startup2

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