couldn't connect to server localhost:27017, connection attempt failed

[Prashant Pokhriyal]

I'm not able to copy a database. It returns me following error:

>db.copyDatabase('testing_demo', 'testing')

{

"ok" : 0,

"errmsg" : "couldn't connect to server localhost:27017, connection attempt failed",

"code" : 6,

"codeName" : "HostUnreachable"

}

I don't know why it says localhost, I'm connecting to mongodb server having ip address 172.31.21.200

mongo --host 172.31.21.200

mongod.conf

# mongod.conf # for documentation of all options, see: # http://docs.mongodb.org/manual/reference/configuration-options/ # Where and how to store data. storage: dbPath: /var/lib/mongodb journal: enabled: true # engine: # mmapv1: # wiredTiger: # where to write logging data. systemLog: destination: file logAppend: true path: /var/log/mongodb/mongod.log # network interfaces net: port: 27017 bindIp: 172.31.21.200 #processManagement: #security: #operationProfiling: #replication: #sharding: ## Enterprise-Only Options: #auditLog: #snmp:

Output of mongo --version

MongoDB shell version v3.4.15

git version: 52e5b5fbaa3a2a5b1a217f5e647b5061817475f9

OpenSSL version: OpenSSL 1.0.2g 1 Mar 2016

allocator: tcmalloc

modules: none

build environment:

distmod: ubuntu1604

distarch: x86_64

target_arch: x86_64

[Ramon Fernandez]

Your /etc/hosts as displayed in SERVER-35838 looks suspicious to me; I’d recommend you try setting it to

127.0.0.1 localhost

172.31.21.200 testing.dev

and try again.

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