Hi everyone,
I’m using a Docker image “mongo” which is created by Docker officials.
Everything works great except when I increase number of replicas. In logs, can see the following:
{"t":{"$date":"2020-12-10T19:02:25.896+00:00"},"s":"I", "c":"CONTROL", "id":23285, "ctx":"main","msg":"Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'"}
{"t":{"$date":"2020-12-10T19:02:25.898+00:00"},"s":"W", "c":"ASIO", "id":22601, "ctx":"main","msg":"No TransportLayer configured during NetworkInterface startup"}
{"t":{"$date":"2020-12-10T19:02:25.898+00:00"},"s":"I", "c":"NETWORK", "id":4648601, "ctx":"main","msg":"Implicit TCP FastOpen unavailable. If TCP FastOpen is required, set tcpFastOpenServer, tcpFastOpenClient, and tcpFastOpenQueueSize."}
{"t":{"$date":"2020-12-10T19:02:25.898+00:00"},"s":"W", "c":"ASIO", "id":22601, "ctx":"main","msg":"No TransportLayer configured during NetworkInterface startup"}
{"t":{"$date":"2020-12-10T19:02:25.898+00:00"},"s":"I", "c":"STORAGE", "id":4615611, "ctx":"initandlisten","msg":"MongoDB starting","attr":{"pid":1,"port":27032,"dbPath":"/data/db","architecture":"64-bit","host":"f74b3b84f2e8"}}
{"t":{"$date":"2020-12-10T19:02:25.898+00:00"},"s":"W", "c":"CONTROL", "id":20720, "ctx":"initandlisten","msg":"Available memory is less than system memory","attr":{"availableMemSizeMB":512,"systemMemSizeMB":3933}}
{"t":{"$date":"2020-12-10T19:02:25.898+00:00"},"s":"I", "c":"CONTROL", "id":23403, "ctx":"initandlisten","msg":"Build Info","attr":{"buildInfo":{"version":"4.4.2","gitVersion":"15e73dc5738d2278b688f8929aee605fe4279b0e","openSSLVersion":"OpenSSL 1.1.1 11 Sep 2018","modules":[],"allocator":"tcmalloc","environment":{"distmod":"ubuntu1804","distarch":"x86_64","target_arch":"x86_64"}}}}
{"t":{"$date":"2020-12-10T19:02:25.898+00:00"},"s":"I", "c":"CONTROL", "id":51765, "ctx":"initandlisten","msg":"Operating System","attr":{"os":{"name":"Ubuntu","version":"18.04"}}}
{"t":{"$date":"2020-12-10T19:02:25.898+00:00"},"s":"I", "c":"CONTROL", "id":21951, "ctx":"initandlisten","msg":"Options set by command line","attr":{"options":{"net":{"bindIp":"*","port":27032},"replication":{"enableMajorityReadConcern":false,"replSet":"jm-replica"},"storage":{"dbPath":"/data/db","journal":{"enabled":true}}}}}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"E", "c":"STORAGE", "id":20557, "ctx":"initandlisten","msg":"DBException in initAndListen, terminating","attr":{"error":"DBPathInUse: Unable to lock the lock file: /data/db/mongod.lock (Resource temporarily unavailable). Another mongod instance is already running on the /data/db directory"}}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"REPL", "id":4784900, "ctx":"initandlisten","msg":"Stepping down the ReplicationCoordinator for shutdown","attr":{"waitTimeMillis":10000}}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"COMMAND", "id":4784901, "ctx":"initandlisten","msg":"Shutting down the MirrorMaestro"}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"SHARDING", "id":4784902, "ctx":"initandlisten","msg":"Shutting down the WaitForMajorityService"}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"NETWORK", "id":20562, "ctx":"initandlisten","msg":"Shutdown: going to close listening sockets"}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"NETWORK", "id":4784905, "ctx":"initandlisten","msg":"Shutting down the global connection pool"}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"STORAGE", "id":4784906, "ctx":"initandlisten","msg":"Shutting down the FlowControlTicketholder"}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"-", "id":20520, "ctx":"initandlisten","msg":"Stopping further Flow Control ticket acquisitions."}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"REPL", "id":4784907, "ctx":"initandlisten","msg":"Shutting down the replica set node executor"}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"NETWORK", "id":4784918, "ctx":"initandlisten","msg":"Shutting down the ReplicaSetMonitor"}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"SHARDING", "id":4784921, "ctx":"initandlisten","msg":"Shutting down the MigrationUtilExecutor"}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"CONTROL", "id":4784925, "ctx":"initandlisten","msg":"Shutting down free monitoring"}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"FTDC", "id":4784926, "ctx":"initandlisten","msg":"Shutting down full-time data capture"}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"STORAGE", "id":4784927, "ctx":"initandlisten","msg":"Shutting down the HealthLog"}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"STORAGE", "id":4784929, "ctx":"initandlisten","msg":"Acquiring the global lock for shutdown"}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"-", "id":4784931, "ctx":"initandlisten","msg":"Dropping the scope cache for shutdown"}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"CONTROL", "id":20565, "ctx":"initandlisten","msg":"Now exiting"}
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"I", "c":"CONTROL", "id":23138, "ctx":"initandlisten","msg":"Shutting down","attr":{"exitCode":100}}
Probably the most interesting part is this:
{"t":{"$date":"2020-12-10T19:02:25.899+00:00"},"s":"E", "c":"STORAGE", "id":20557, "ctx":"initandlisten","msg":"DBException in initAndListen, terminating","attr":{"error":"DBPathInUse: Unable to lock the lock file: /data/db/mongod.lock (Resource temporarily unavailable). Another mongod instance is already running on the /data/db directory"}}
I found this issue happens when we use volume and mount it becasue Dockerfile creates “mongodb” user and volume is created by root.
More on that here: mongodb - Mongo docker with volume get error - Stack Overflow
However, I also face another error:
"members" : [
{
"_id" : 0,
"name" : "mongo-1:27030",
"health" : 0,
"state" : 8,
"stateStr" : "(not reachable/healthy)",
"uptime" : 0,
"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("2020-12-11T11:34:57.208Z"),
"lastHeartbeatRecv" : ISODate("1970-01-01T00:00:00Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "Error connecting to mongo-1:27030 :: caused by :: Could not find address for mongo-1:27030: SocketException: Host not found (authoritative)",
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"configVersion" : -1,
"configTerm" : -1
},
{
"_id" : 1,
"name" : "mongo-2:27031",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 107,
"optime" : {
"ts" : Timestamp(1607686093, 1),
"t" : NumberLong(41)
},
"optimeDate" : ISODate("2020-12-11T11:28:13Z"),
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"configVersion" : 95732,
"configTerm" : -1,
"self" : true,
"lastHeartbeatMessage" : ""
},
{
"_id" : 2,
"name" : "mongo-3:27032",
"health" : 0,
"state" : 8,
"stateStr" : "(not reachable/healthy)",
"uptime" : 0,
"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("2020-12-11T11:34:57.096Z"),
"lastHeartbeatRecv" : ISODate("2020-12-11T11:34:56.923Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "replica set IDs do not match, ours: 5fd22a776b0ed74077c65ca8; remote node's: 5fd29e358b77ac2c30973a4c",
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"configVersion" : -1,
"configTerm" : -1
}
],
It says replica set IDs do not match.
Have you ever had these errors? If I try to execute rs.reconfig() nothing will happen. Simply unsolvable.
I am worried if these two errors are connected. If yes, then it’s fine because I’ll somehow find a way to solve the first (and then second won’t appear again).
However, I am worried if these two are not connected because I am not able to solve it. Whatever I try - nothing.
Thanks.
EDIT: Interestng is that I redeployed stack again and my script gets documents although my latest rs.status looks like this:
{
"set" : "jm-replica",
"date" : ISODate("2020-12-11T11:45:57.587Z"),
"myState" : 2,
"term" : NumberLong(42),
"syncSourceHost" : "",
"syncSourceId" : -1,
"heartbeatIntervalMillis" : NumberLong(2000),
"majorityVoteCount" : 2,
"writeMajorityCount" : 2,
"votingMembersCount" : 3,
"writableVotingMembersCount" : 3,
"optimes" : {
"lastCommittedOpTime" : {
"ts" : Timestamp(0, 0),
"t" : NumberLong(-1)
},
"lastCommittedWallTime" : ISODate("1970-01-01T00:00:00Z"),
"appliedOpTime" : {
"ts" : Timestamp(1607686302, 2),
"t" : NumberLong(41)
},
"durableOpTime" : {
"ts" : Timestamp(1607686302, 2),
"t" : NumberLong(41)
},
"lastAppliedWallTime" : ISODate("2020-12-11T11:31:42.115Z"),
"lastDurableWallTime" : ISODate("2020-12-11T11:31:42.115Z")
},
"members" : [
{
"_id" : 0,
"name" : "mongo-1:27030",
"health" : 0,
"state" : 8,
"stateStr" : "(not reachable/healthy)",
"uptime" : 0,
"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("2020-12-11T11:45:57.535Z"),
"lastHeartbeatRecv" : ISODate("1970-01-01T00:00:00Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "replica set IDs do not match, ours: 5fd29e358b77ac2c30973a4c; remote node's: 5fd22a776b0ed74077c65ca8",
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"configVersion" : -1,
"configTerm" : -1
},
{
"_id" : 1,
"name" : "mongo-2:27031",
"health" : 0,
"state" : 8,
"stateStr" : "(not reachable/healthy)",
"uptime" : 0,
"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("2020-12-11T11:45:57.524Z"),
"lastHeartbeatRecv" : ISODate("1970-01-01T00:00:00Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "replica set IDs do not match, ours: 5fd29e358b77ac2c30973a4c; remote node's: 5fd22a776b0ed74077c65ca8",
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"configVersion" : -1,
"configTerm" : -1
},
{
"_id" : 2,
"name" : "mongo-3:27032",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 96,
"optime" : {
"ts" : Timestamp(1607686302, 2),
"t" : NumberLong(41)
},
"optimeDate" : ISODate("2020-12-11T11:31:42Z"),
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"configVersion" : 1,
"configTerm" : 41,
"self" : true,
"lastHeartbeatMessage" : ""
}
],
"ok" : 1,
"$clusterTime" : {
"clusterTime" : Timestamp(1607687155, 1),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
},
"operationTime" : Timestamp(1607686302, 2)
}
Thanks