Hi, could you help me?
My MongoServer Can’t connect suddendly. I have to restart the serivce. When I rebooted it went back to normal.
shards:
{ "_id" : "shard1", "host" : "shard1/172.31.34.189:26102,172.31.55.216:26101", "state" : 1 }
{ "_id" : "shard2", "host" : "shard2/172.31.34.189:26202,172.31.55.216:26201", "state" : 1 }
active mongoses:
"4.4.2" : 2
autosplit:
Currently enabled: yes
balancer:
Currently enabled: yes
Currently running: yes
This is the sh.status() result.
{"t":{"$date":"2022-12-25T03:48:14.243+00:00"},"s":"I", "c":"COMMAND", "id":51803, "ctx":"conn154427","msg":"Slow query","attr":{"type":"command","ns":"config.settings","command":{"find":"settings","filter":{"_id":"balancer"},"readConcern":{"level":"majority","afterOpTime":{"ts":{"$timestamp":{"t":1671940093,"i":29}},"t":21}},"limit":1,"maxTimeMS":30000,"$readPreference":{"mode":"nearest"},"$replData":1,"$clusterTime":{"clusterTime":{"$timestamp":{"t":1671940093,"i":99}},"signature":{"hash":{"$binary":{"base64":"PPI/BzNOqrCY3s1/RYI2ELBVAZM=","subType":"0"}},"keyId":7114258600180056070}},"$configServerState":{"opTime":{"ts":{"$timestamp":{"t":1671940093,"i":29}},"t":21}},"$db":"config"},"planSummary":"IDHACK","keysExamined":1,"docsExamined":1,"cursorExhausted":true,"numYields":0,"nreturned":1,"reslen":634,"locks":{"ReplicationStateTransition":{"acquireCount":{"w":1}},"Global":{"acquireCount":{"r":1}},"Database":{"acquireCount":{"r":1}},"Collection":{"acquireCount":{"r":1}},"Mutex":{"acquireCount":{"r":1}}},"readConcern":{"level":"majority","afterOpTime":{"ts":{"$timestamp":{"t":1671940093,"i":29}},"t":21},"provenance":"clientSupplied"},"storage":{},"protocol":"op_msg","durationMillis":777}}
{"t":{"$date":"2022-12-25T03:48:14.905+00:00"},"s":"I", "c":"COMMAND", "id":51803, "ctx":"conn154418","msg":"Slow query","attr":{"type":"command","ns":"config.settings","command":{"find":"settings","filter":{"_id":"balancer"},"readConcern":{"level":"majority","afterOpTime":{"ts":{"$timestamp":{"t":1671940094,"i":63}},"t":21}},"limit":1,"maxTimeMS":30000,"$readPreference":{"mode":"nearest"},"$replData":1,"$clusterTime":{"clusterTime":{"$timestamp":{"t":1671940094,"i":180}},"signature":{"hash":{"$binary":{"base64":"1TET/VqSbvF85gQfFikrrU0QyxU=","subType":"0"}},"keyId":7114258600180056070}},"$configServerState":{"opTime":{"ts":{"$timestamp":{"t":1671940094,"i":63}},"t":21}},"$db":"config"},"planSummary":"IDHACK","keysExamined":1,"docsExamined":1,"cursorExhausted":true,"numYields":0,"nreturned":1,"reslen":634,"locks":{"ReplicationStateTransition":{"acquireCount":{"w":1}},"Global":{"acquireCount":{"r":1}},"Database":{"acquireCount":{"r":1}},"Collection":{"acquireCount":{"r":1}},"Mutex":{"acquireCount":{"r":1}}},"readConcern":{"level":"majority","afterOpTime":{"ts":{"$timestamp":{"t":1671940094,"i":63}},"t":21},"provenance":"clientSupplied"},"storage":{},"protocol":"op_msg","durationMillis":192}}
{"t":{"$date":"2022-12-25T03:48:20.905+00:00"},"s":"I", "c":"COMMAND", "id":51803, "ctx":"conn154418","msg":"Slow query","attr":{"type":"command","ns":"config.settings","command":{"find":"settings","filter":{"_id":"balancer"},"readConcern":{"level":"majority","afterOpTime":{"ts":{"$timestamp":{"t":1671940100,"i":49}},"t":21}},"limit":1,"maxTimeMS":30000,"$readPreference":{"mode":"nearest"},"$replData":1,"$clusterTime":{"clusterTime":{"$timestamp":{"t":1671940100,"i":52}},"signature":{"hash":{"$binary":{"base64":"99IxqsAAAwJILd1F0pikYD1Pehw=","subType":"0"}},"keyId":7114258600180056070}},"$configServerState":{"opTime":{"ts":{"$timestamp":{"t":1671940100,"i":49}},"t":21}},"$db":"config"},"planSummary":"IDHACK","keysExamined":1,"docsExamined":1,"cursorExhausted":true,"numYields":0,"nreturned":1,"reslen":634,"locks":{"ReplicationStateTransition":{"acquireCount":{"w":1}},"Global":{"acquireCount":{"r":1}},"Database":{"acquireCount":{"r":1}},"Collection":{"acquireCount":{"r":1}},"Mutex":{"acquireCount":{"r":1}}},"readConcern":{"level":"majority","afterOpTime":{"ts":{"$timestamp":{"t":1671940100,"i":49}},"t":21},"provenance":"clientSupplied"},"storage":{},"protocol":"op_msg","durationMillis":637}}
{"t":{"$date":"2022-12-25T03:48:26.244+00:00"},"s":"I", "c":"COMMAND", "id":51803, "ctx":"conn154418","msg":"Slow query","attr":{"type":"command","ns":"config.collections","command":{"find":"collections","filter":{"_id":"config.system.sessions"},"readConcern":{"level":"majority","afterOpTime":{"ts":{"$timestamp":{"t":1671940105,"i":41}},"t":21}},"limit":1,"maxTimeMS":30000,"$readPreference":{"mode":"nearest"},"$replData":1,"$clusterTime":{"clusterTime":{"$timestamp":{"t":1671940105,"i":162}},"signature":{"hash":{"$binary":{"base64":"WQuJLTjYY+Q3DVt6oXrKC21qC60=","subType":"0"}},"keyId":7114258600180056070}},"$configServerState":{"opTime":{"ts":{"$timestamp":{"t":1671940105,"i":41}},"t":21}},"$db":"config"},"planSummary":"IDHACK","keysExamined":1,"docsExamined":1,"cursorExhausted":true,"numYields":0,"nreturned":1,"reslen":764,"locks":{"ReplicationStateTransition":{"acquireCount":{"w":1}},"Global":{"acquireCount":{"r":1}},"Database":{"acquireCount":{"r":1}},"Collection":{"acquireCount":{"r":1}},"Mutex":{"acquireCount":{"r":1}}},"readConcern":{"level":"majority","afterOpTime":{"ts":{"$timestamp":{"t":1671940105,"i":41}},"t":21},"provenance":"clientSupplied"},"storage":{},"protocol":"op_msg","durationMillis":524}}
in config log
{"t":{"$date":"2022-12-29T08:41:31.450+00:00"},"s":"I", "c":"SHARDING", "id":22661, "ctx":"ChunkSplitter-2593","msg":"Waiting for distributed lock","attr":{"lockName":"tata.conquests","elapsedSeconds":11,"reason":"splitting chunk [{ uid: -4641912379054539892 }, { uid: -4213986427187655909 }) in tata.conquests"}}
{"t":{"$date":"2022-12-29T08:41:14.074+00:00"},"s":"I", "c":"SHARDING", "id":21910, "ctx":"ChunkSplitter-2593","msg":"Unable to auto-split chunk","attr":{"chunk":"[{ uid: MinKey }, { uid: -8792683997446322767 })","namespace":"tata.conquests","error":"LockBusy: split failed :: caused by :: could not acquire collection lock for tata.conquests to split chunk [{ uid: MinKey }, { uid: -8792683997446322767 }) :: caused by :: timed out waiting for tata.conquests"}}
in shard log
And I found many errors like these.
These errors disappeared after I restarted, but reappeared 1 day later with a small amount of.
I would like to know why these errors are there and if they are causing the service to be unavailable