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Question 34 - MCIA - Level 1 discussion

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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?

A.
Database polling continues Only HTTP requests sent to the remaining node continue to beaccepted
Answers
A.
Database polling continues Only HTTP requests sent to the remaining node continue to beaccepted
B.
Database polling stops All HTTP requests continue to be accepted
Answers
B.
Database polling stops All HTTP requests continue to be accepted
C.
Database polling continues All HTTP requests continue to be accepted, but requests to the failednode Incur increased latency
Answers
C.
Database polling continues All HTTP requests continue to be accepted, but requests to the failednode Incur increased latency
D.
Database polling stops All HTTP requests are rejected
Answers
D.
Database polling stops All HTTP requests are rejected
Suggested answer: A

Explanation:

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

asked 18/09/2024
adil benmekki
35 questions
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