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Questions tagged [mongodb-replica-set]

MongoDB's replica set uses redundant nodes to provide a high availability and resilience against network partitions of the primary node.

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Error whet trying to mongodump 3 nodes remote replica set

I stuck trying to implement some backup strategy for our mongodb replica set (3 nodes on aws) When i trying to make mongodump mongodump --host="mydb/db1.myapp.co:27017,db2.myapp.co:27017,db3.myapp.co:27017" -o /home/ubuntu/db_backups/1 -d…
Taras Myronovich
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Performance drop in upsert after delete with replica set

I will need your help with understanding an performance problem. We have a system where we are storing set of documents (1k-4k docs) in batches. Documents have this structure: {_id: ObjectId(), RepositoryId: UUID(), data...} where repository id is…
Matěj Mainuš
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Mongodb unable to connect to cluster

We are using mongodb community addition . We are able to connect to independent nodes primary, and 2 replicas using direct connection. But when we try to connect to replica set using…
user3184674
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Prevent secondary node from pushing changes made to its own copy of the data to the primary node

I have created a replica of 3 nodes where 1 node is primary and another 2 are secondary. I have assigned lower priority to the secondary nodes than the primary node. I want the ability where changes made in the secondary node should not be…
Prasanna
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Python can't connect to mongodb-replSet

I have a mongodb-replSet called replicaSetOne and it has 2 members. 192.168.0.1 -PRIMARY- 192.168.0.2 -SECONDARY- Now I have worked on my pyton-skills and in my app I have a simple connectionstring: mongoConnection =…
don huan
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Mongodb Filesystem backup and restore

I am taking backup of MongoDB filesystem backup(including config files). We are not using sharding in our cluster, having 3node replicaset in place. Primary Cluster: X_host1, X_host2, X_host3 Secondary Cluster: Y_host1, Y_host2, Y_host3 Taking…
Anto
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Connection String port not detected by MongoDb Compass

I'm running a containerized cluster of MongoDB locally. I have installed MongoDB compass on my Mac pro and trying to connect to it. The issue is that Compass is not getting the new ports I configured. BTW, the connection through Mongo shell worked…
Houssam Badri
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How to initiate mongodb replica set using nodejs

I'm running the following code for mongodb replica set initialization: try { const mongoClient: MongoClient = new MongoClient(process.env.MONGODB_URI || 'mongodb://mongodb:27017', {replicaSet: "rs0"}); const mongoDb: Db = new Db(mongoClient,…
Alex L
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OplogStartMissing MongoDB Replicaset

What does OplogStartMissing during Rollback mean in MongoDB? Why does MongoDB needs to find common point ? What is the intention and necessity. 2022-09-19T20:30:54.921+0000 I REPL [rsBackgroundSync] Starting rollback due to OplogStartMissing:…
Vineel
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Delay in get query mongodb replica set

I have a replica set with two members which are working fine except one thing that is when I add something and immediately gets it then it does not return the data, it seems the post query is executed on primary and get on secondary which does not…
Vikram
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MongoDB connection URI with different readPreferences with readPreferenceTags

I have a connection URI mongodb://host.example.com/?readPreference=secondaryPreferred&readPreferenceTags=region:uswest;readPreferenceTags= Now, if I use .WithReadPreference(ReadPreference.Primary), I understand that it overrides the read preference…
rand_guy
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Writes to MongoDB are lost when primary node changes in a shard replicaset

I am using nodejs driver to write to MongoDB cluster. The cluster is on kubernetes with 2 mongos replicas, 4 shards with PSS setup each and config server with PSS setup as well. My application (nodejs) connects to mongos (mongos replicas are behind…
devm
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MongoServerError: "No host described in new configuration with {version: 1, term: 0} for replica set rs0 maps to this node," How do I fix this?

Started mongo server using mongod --port 27018 --dbpath "/usr/local/var/mongodb/data/db0" --replSet rs0 --bind_ip "locahost,0.0.0.0" And connected to the instance using mongosh mongodb://127.0.0.1:27018/vndr Tried to initiate a replica set using…
Dozie
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ERROR Configuring mongoDB using Ansible (MongoNetworkError: connect ECONNREFUSED)

I'm trying to configure a replicaset of mongodb using ansible, I succeeded to install mongoDB on the primary server and created the replica-set configuration file except when I launch the playbook, I get an error of type: MongoNetworkError: connect…
Devops student
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MongoDB OplogStartMissing

I understand that some times MongoDB secondary data becomes stale at which point, we need to perform an init sync from the Primary instance. But sometimes we see error logs that look like this: 2022-07-22T21:24:20.065+0000 I REPL …
Vineel
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