MongoDB is a document oriented database (also known as NoSQL database).

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475 views

Corrupt WiredTiger MongoDB files

I'm running MongoDB with the WiredTiger engine on an ext4 file system. The last thing that I did was start building an index, but then something came up and I needed to cancel the index build and ...
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55 views

MongoDB replication failure

I am trying to debug an odd issue that results in the failure or a replica set secondary becoming out of date and unable to catchup with the primary (running on AWS, AWS linux). The typical ...
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220 views

adding mongodb authentication breaks connecting via nodejs

I needed to have external access to my mongodb database, so I have removed the bind_ip from the mongod.conf file, and turned on auth. I then added a root user that can access everything, and tried to ...
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567 views

How to find/kill long running mongo scripts

I think I have a long running mongo script tanking my database, but I'm not sure. I was connected to the linux server via SSH and I ran the script like so: mongo my_database my_script.js It started ...
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72 views

Mongodb failing to start using init script with dbpath on mounted drive

I've been trying to set up a mongodb instance (2.6.11) on my CentOS 6.3 to use a data location on a different drive because of space constraints on the default location of /var/lib/mongo I've changed ...
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35 views

What is the resolved default location mongod.exe looks for the configuration in?

Trying to do a minimal configuration of mongod, and I would like to use the 'natural' pathing structure for the location of the config file. To give an example on what I am looking for, here are the ...
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58 views

MongoDB fsyncUnlock won't unlock occasionally on Windows

We have a MongoDB replica set installed on Windows servers, with a scheduled backup job. MongoDB is configured to use journaling. The job runs db.fsyncLock() via script on MongoDB (primary server), ...
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136 views

Huge oplog size after full sync on one secondary causing performance issues - MongoDB

I'm a MongoDB newbie. I have a replica set with 3 members (1 primary and 2 secondaries) on CentOS 6 and Mongo 2.6.8. One of the secondaries crashed because of high consumption of memory and I ...
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240 views

Mongo 2.6.9 process stopping, no error logs

I have a Mongo 2.6.9 process running on a Linux SMP instance. Here's uname -a with the server name redacted: Linux xxx.xxxx.com 3.13.0-042stab085.20 #1 SMP Sun Jul 20 13:27:24 MSK 2014 x86_64 x86_64 ...
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81 views

MongoDB Backup & purge

I'm exploring solutions for a basic dbadmin need : periodically backing up and purging data in MongoDB. Basically, I need a logrotate for mongodb. I have a backend program filling a collection. I ...
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6 views

MongoDB - Tie user to specific replica set node

Is there a way in MongoDB 3.0 to allow users access to only a single replica set node? We have a lot more data on disk than we do memory. So to keep our production support from paging into memory ...
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195 views

exception in initAndListen: 28595 2: No such file or directory, terminating

after server crashed, mongod service don't start. OS: Windows Server 2008 R2 start mongo version: 3.0.0 repair option don't help, journal directory is empty after crash update mongo to 3.0.2, this is ...
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172 views

MongoDB mongos memory usage

Planning how to deploy a shard-ready cluster (Single shard at the moment, with all config servers and mongos processes), I've read the MongoDB operations best practices. I have doubts about the memory ...
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43 views

Merge 7 node mongodb (2.4) cluster into one standalone mongo shard

I'm running a 7 node mongodb sharded cluster (version 2.4...). I would like to merge this into a standalone shard with 7 times the disk-space. I've tried to create the single shard instance and ...
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727 views

AWS Linux yum repository can't find MongoDB packages for install

I am trying to install the latest version of MongoDB for my 32-bit AWS Linux instance. I am following these instructions from the MongoDB documentation. I have created the .repo file in the proper ...
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101 views

Mongo Cluster - Unresponsive node/primary prevents creation of databases, secondary didn't take over

I have a Mongo cluster with a few shards each backed by replicasets with a primary, a secondary and an arbiter. Today one of the primaries became unresponsive. I logged into it directly and tried a ...
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202 views

Migrate standalone Mongo DBs to sharded/replicated cluster

Currently I have several independent standalone Mongo servers. I have Now set up a sharded and replicated Mongo cluster. I plan to copy over all databases from the standalone Mongo servers to the ...
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1k views

how to integrate between MONGODB & SOLR, using MONGO-CONNECTOR

Like this I started my mongod with replSet mod mongod --dbpath=/home/local/ASSYST-COC/so/mongo --replSet myrep --auth mongo started mongo -u root -p root --authenticationDatabase admin IN ...
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734 views

MongoDB Performance Troubleshooting

I have a small MongoDB replica set (2.4.6) and it seems about once a week, the primary gets bogged and the load average spikes up. This app doesn't see a huge amount of traffic. It resides in EC2 ...
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10 views

Taring mongodump database produce different checksum

(I am french so sorry for bad english) I am trying to backup my mongo database and check for changes with a sha1 checksum. The problem is that the checksum is not the same. $ mongodump --quiet --db ...
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9 views

mongodump on mongos : Shard not found for server

Trying to mongodump a mongodb 3.2.1 cluster with : - 3 mongos on port 28018 + keyfile internal auth (one shard on rs0) - 3 mongod_config servers on port 28019 using keyfile internal auth + auth - 3 ...
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11 views

AWS MongoDB 3.0.6 replicaset - Primary server becomes unresponsive to connections and read timeouts

We have an existing MongoDB replicaset deployment in which all the servers are running on version 3.0.6 on AWS Linux machines within a private VPC. This mongodb version has been deployed since ...
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26 views

Mistakenly upgraded MongoDB 2.6 straight to 3.2

I upgraded a dev box form mongo 2.6 to 3.2. I had every intention of upgrading to 3.0 and then 3.2 as per the docs, but thanks to a glorious bit of lack of attention ended up just upgrading straight ...
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24 views

Upgrading mongoDB shard to 3.2

mongoDB's Upgrade Recommendations for upgrading a sharded cluster from 3.0 to 3.2 only describe to scenario of upgrading the shard members one at a time, which I can understand is what most people ...
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28 views

What are the proper Readahead values for a RAID 10 array over 4 EBS PIOPS volumes?

tl;dr - What are the proper readahead values for the different EBS PIOPS volumes in a RAID 10 array ? What about the RAID 10 physical and logical volumes themselves ? What about the chunk size of the ...
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143 views

MongoDB 3.2 on Windows 8.1, I can not start the service

I am running mongoDB 3.2 the OS is Windows 8.1. I can not seem to start the net service for MongoDB I started Mongod OK and it is listening I started Mongo as well MongoDB shell version: 3.2.0 ...
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114 views

Failed to authenticate with mechanism MONGODB-CR AuthenticationFailed MONGODB-CR credentials missing in the user document

When i have to connect remote database in Mongodb getting error on log using robomongo database. tail -f /var/log/mongodb/mongodb.log 2015-10-03T00:29:51.275-0500 I ACCESS [conn25] Failed to ...
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34 views

Nginx/Passenger (with Rails, Capistrano and MongoDB replica set)

I've encountered a problem with a Ruby on Rails application that runs under Nginx/Passenger and connects to MongoDB replica set. Everything worked fine until suddenly the application stopped ...
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83 views

Kill Meteor On Ubuntu

I will try to post calmly but really I want to throw my computer out the window. I have resized my digital ocean droplet, and all of a sudden there is a second instance of meteor running, with a ...
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9 views

Mongo geoquey on nested element

I have an entity type with an array of elements like this: { id:..., locations:[ { type: "home", location : [ 30.09 , 4.0 ] }, { type: "office", location : ...
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27 views

Error reparing mongo db

I have one mongo 3.0.2 database on Ubuntu 14.04.3 LTS. Size of data directory - 3.5 TB. Database worked during several days with failed RAM hardware. Now RAM is replaced with good one, but database ...
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85 views

How to allocate more resources to Node.JS process?

I'm not a (very good) back-end developer so understanding processes and memory are a little about my pay grade. I'm currently building an app using the MEAN stack. I have a separate Express server ...
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30 views

How to monitor MongoDB cursors

I have a MongoDB cluster with 1 PRIMARY and 2 SECONDARY servers. In the last couple of days the number of open cursors has risen from 10-20 a sec to more than 2K and keep rising. I'm getting a lot of ...
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44 views

MongoDB: exception: no primary shard configured for db: config, code: 8041

I have set up mongodb sharded cluster with 2 replica set having 3 member each, 3 config server and 2 mongos instance on AWS. I am getting following error I SHARDING [Balancer] moveChunk result: { ...
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11 views

MongoDB with ReplicaSet perform updates / compact

I have a MongoDB in ReplicaSet with 1 primary, 1 secondary and 1 arbitrer. I'm doing an heavy update operation on a huge collection (more than 2.5M records), this operation will decrease the ...
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26 views

ISSnode not able to reconnect to MongoDB on Azure Webapps

Its weird that ISSNODE is preventing re-connection to mongodb replica set in the following scenario. Primary server goes down and secondary server is set as primary server, at this period the ...
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19 views

Can mongos 2.6.x / 3.x connect to mongod 2.4.x?

We are currently in the process of upgrading our 2.4.x mongodb sharded cluster to 3.x (via 2.6.x). We have a large number of mongos instances, as we have mongos installed locally on each of the ...
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172 views

Unable to install php-mongo extension

i'm trying to install the mongo.so extension but it fails. According to PHP Mongo Installation manual, i should run : sudo pecl install mongo tho i get this error : downloading ...
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94 views

mongodb sh.addShard returns error: host does not belong to replica set

I try to create a mongodb cluster with three config servers, two shards with three replica each and one query router. The installation of the config servers, query router, and the creation of a ...
0
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228 views

How To: Dockerized MongoDB Replication on Elastic Container Service

I have a Node.js app together with a MongoDB database running on AWS ECS. The setup I've got currently is formed of 2 ELB's and 2 Instances running each a Docker container with its assigned service ...
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45 views

pymongo authentication in mac os failing

I have a database named 'abc', for which I created a user "dc". The db.getUsers() from mongo shell shows [ { "_id" : "abc.dc", "user" : "dc", "db" : "abc", "roles" ...
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54 views

MongoDB 3.0 on RHEL 6.5 - Startup fails with WT storageengine

I have MongoDB 3.0 installed on RHEL 6.5. The initial setup was done using MMAPv1 storage engine and works fine. i'm currently trying to switch this installation to a WiredTiger storage engine and ...
0
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0answers
24 views

Mongod cli version differs from db.version

I've followed the instructions to upgrade Mongo from 2.4 to 2.6, which was basically just to install the new binaries, but the versions being reported are inconsistent. I've tried restarting the ...
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15 views

Ensure Full Admin When Upgrading User Profiles

I have a MongoDB replica set who is sitting on version 2.6 currently. After trying to update our secondary to 3.x, I found out that I need to update the users on the admin table to be 2.6 compliant. ...
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19 views

Disabling Transparent Huge Pages for Mongodb - is it important?

I am running mongodb on a server with other software running as well. So before disabling this setting on my system , i have 2 questions: 1) how much does it change for mongodb ? does it really ...
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32 views

MongoDB backup browse GridFS

I have "big" MongoDB database (~100GB) with GridFS, using mongodump I made backup for this database and I wan't to browse files in GridFS, can this be done without restoring backup?
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87 views

Random mongo shutdown

I had mongo randomly shutdown on one of my servers today and I was wondering if anyone could take a look at the logs below and tell me what might have happened. The server is hosted on digital ocean ...
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123 views

DataFileSync flushing mmaps takes a long time

We are running MongoDB 2.6.9 on a 64 bit Ubuntu Linux VM. When I look in the database folder, this is what I see with ls -lh: -rw------- 1 mongodb mongodb 64M Apr 15 14:26 admin.0 -rw------- 1 ...
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47 views

AWS deployed mongodb not connecting through node JS driver

I have a weird problem. I was able to connect mongodb through node JS drivers two days back. Suddenly I am getting connection time out. Mongodb is installed on Amazon AWS. I am able to connect mongodb ...
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75 views

mongodb avgObjSize confusion and effect of field length on storage size

I have a Replica Set of 3 instances instance A: Mongodb 3.0 (using wiredtiger storage engine) instance B: Mongodb 2.6 (using good old mmapv1) instance C: Mongodb 3.0 arbiter and i have 3 ...