Discuss Salesforce Salesforce Certified MuleSoft Platform Integration Architect (Mule-Arch-202) Exam Topic 9 Question 43

Refer to the exhibit.

A Mule application is deployed to a cluster of two customer-hosted Mute runtimes. The Mute application has a flow that polls a database and another flow with an HTTP Listener.

HTTP clients send HTTP requests directly to individual cluster nodes.

What happens to database polling and HTTP request handling in the time after the primary (master) node of the cluster has railed, but before that node is restarted?

ADatabase polling continues Only HTTP requests sent to the remaining node continue to be accepted

BDatabase polling stops All HTTP requests continue to be accepted

CDatabase polling continues All HTTP requests continue to be accepted, but requests to the failed node Incur increased latency

DDatabase polling stops All HTTP requests are rejected

Suggested Answer: A

Correct answer is Database polling continues Only HTTP requests sent to the remaining node continue to be accepted. : Architecture descripted in the question could be described as follows.When node 1 is down , DB polling will still continue via node 2 . Also requests which are coming directly to node 2 will also be accepted and processed in BAU fashion. Only thing that wont work is when requests are sent to Node 1 HTTP connector. The flaw with this architecture is HTTP clients are sending HTTP requests directly to individual cluster nodes. By default, clustering Mule runtime engines ensures high system availability. If a Mule runtime engine node becomes unavailable due to failure or planned downtime, another node in the cluster can assume the workload and continue to process existing events and messages

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24 comments · newest first

Queen 2 days ago

I don't like D. Rejecting all requests seems harsh.

Annabelle 8 days ago

C seems right. Latency could happen with the failed node.

Desiree 13 days ago

I feel like B is too extreme. Why stop polling?

Holley 18 days ago

I think option A makes sense. Polling should keep going.

Talia 23 days ago

I’m with C. Polling might lag, but requests should still go through.

Thaddeus 28 days ago

A seems logical. The other node can handle requests.

Gearldine 1 month ago

I lean towards D. If the master fails, everything should halt.

Buck 1 month ago

C could be right. Increased latency sounds plausible.

James 1 month ago

I feel like B makes sense. If one node fails, why would polling stop?

Leila 2 months ago

I think the answer is A. Database polling should keep going.

Adria 2 months ago

I think option C is a possibility too, but not sure.

Nu 2 months ago

HTTP requests should still go through, right?

Thersa 2 months ago

Wait, are you sure about that? What if the other node can handle it?

Tomoko 2 months ago

I agree, option B makes the most sense.

Percy 2 months ago

Database polling stops when the master node fails.

Virgina 3 months ago

C) seems plausible, but increased latency? Not sure about that one.

Maira 3 months ago

Totally agree with A), makes sense for the remaining node to handle requests.

Janae 3 months ago

Wait, how can polling continue if the master is down? Sounds off.

Zack 3 months ago

I think B) is correct. Polling should stop if the master fails.

Pamella 3 months ago

A) Database polling continues, only HTTP requests to the remaining node are accepted.

Hester 4 months ago

I remember something about increased latency when a node fails, but I can't remember if that applies to polling or just HTTP requests. This is tricky!

Shasta 4 months ago

I’m leaning towards option B because I recall that HTTP requests can still be processed by the remaining node, but I’m not confident about the database polling.

Nilsa 4 months ago

This reminds me of a practice question where we discussed how HTTP requests are handled in a cluster. I feel like option A could be correct.

Rachael 5 months ago

I think I remember that when a master node fails, the database polling might stop since it relies on that node. But I'm not entirely sure.

Salesforce Certified MuleSoft Platform Integration Architect (Mule-Arch-202) Exam - Topic 9 Question 43 Discussion