Hi Friends, In an Aerospike cluster, is there a method (ideally java client API) which can locate the node id(s) of the host where a given record is store? For example, I know a record with namespace, set and PK, how can I find out in which node(s) the record is stored? Thanks.

Hm, again this isn’t something that the client exposes by default so you will need to extend the WriteCommand and expose the protected partition so that you can access partition.replicas. public class MyCommand extends WriteCommand { public AtomicReferenceArray<Node>[] getReplicas() { r…

I haven’t tested, but looking at the Java client it seems you would create a either a WriteCommand or ReadCommand with the applicable policy and key and then call the commands getNode method. For this you will need access to the client’s cluster object which is protected by default so you would need…

Hi kporter, Thanks for the reply. I looked at AerospikeClient class but the getNode() method requires string NodeName as parameter. So I doubt if it will work.

I’m calling the getNode command on the WriteCommand class.

Here is a hack… :frowning: … (key1 is the record of interest, I am assuming it exists on the cluster already - so this is expected to fail. AerospikeException can retrieve the node.) try{ WritePolicy wp = new WritePolicy(); wp.recordExistsAction=…

Understood and that works! Thanks a lot. :smiley:

Have not yet tried but looks like a simpler solution! :smiley:

Here comes the further question: Is it possible to get a list of master and replica nodes in which the record is stored?

Technically, the java client does know who the replica node is for this key. You will have to dig into the java client source code to figure that one out, as far as I know. Never seen a request for such info. Why does your application need it? May be there is another way to achieve what you are tryi…

I’ve put together a utility which can help with some of these functions particularly for testing purposes. You can find it at GitHub - aerospike-examples/debug-aerospike-client: Implementation of the IAerospikeClient interface which allows debug code and timing metrics , and it has a couple of functi…

Locate Aerospike node id from a record

Client Libraries Java Client

shienxie April 1, 2020, 6:03pm 11

Yes, this is for testing purpose and also support engineers want to know for some reason.

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Locate Aerospike node id from a record

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