Unknown Namespace Error with AQL

[abhishek.pathak]

Hello Devs,

So I just started with Aerospike and I am facing this unknown namespace error quite frequently.

Specs:

• Ubuntu 18.04
• Aerospike 4.7.0.2 - Community edition

Steps:

1. I configured aerospike.conf with new namespace, suppose myApp
2. I restarted aerospike service, using systemctl start aerospike
3. Once started, I started aql shell and entered, SELECT * FROM myApp and it shows, Error: (1) unknown-namespace.
4. Then I inserted data through Node.js client successfully, and when I do SELECT * FROM myApp again, I get the following, which to my surprise, shouldn’t happen because I am getting data now.

What could be the cause? Because once I restart my system, and aerospike service is restarted, it shows only this, → Error: (1) unknown-namespace

Any help is appreciated. Thank you.

[abhishek.pathak]

Okay, I just found this, me and my colleague have different local setup of Aerospike.

When I run show namespaces, it shows namespaces from other machine (as we are connected on same WIFI). Can anyone explain me this?

[pgupta]

namespace name is case sensitive. you created

myapp

but are looking for

myApp

in AQL.

[pgupta]

can you run

$ asadm -e info

and share the output?

[abhishek.pathak]

Sorry for not making it clear… actually, myApp was just a made-up name in first pic as it was my project name as the namespace.

In second picture, I tried reinstalling and now creating a new namespace with name myapp.

Thank you.

[kporter]

@abhishek.pathak

Okay, I just found this, me and my colleague have different local setup of Aerospike.

When I run show namespaces, it shows namespaces from other machine (as we are connected on same WIFI). Can anyone explain me this?

Your nodes are forming a cluster with one another. You can prevent this by configuring cluster-name which will then only allow your node to join other nodes with the same cluster-name.

Another option is to configure the node to use ‘mesh’ heartbeats instead of ‘multicast’.