CODEWITHSUNDEEP
javaamazon-web-servicesaws-lambda
Duncan McGregor
Duncan McGregor

Reputation: 18157

Will 2 threads ever access my Java AWS Lambda concurrently?

Does AWS maintain a thread-pool and dispatch concurrent incoming requests to the same Lambda instance, or spin up another instance in these circumstances?

I know that at some load factor another instance will be started, but can I rely on single-threaded access within a Lambda?

Upvotes: 6

Views: 135

Answers (1)

matsev
matsev

Reputation: 33749

A Lambda instance processes one event at the time. If more events arrive before the event is processed, a new instance is spawned. Copied from the AWS Lambda developer guide:

The first time you invoke your function, AWS Lambda creates an instance of the function and runs its handler method to process the event. When the function returns a response, it sticks around to process additional events. If you invoke the function again while the first event is being processed, Lambda creates another instance.

Upvotes: 1

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