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I got the error like "Elastic network interface limit is exceeded. Please increase your elastic network interface limit"

0

I recently encountered an issue while using AWS ECS and Glue services: "Elastic network interface limit is exceeded. Please increase your elastic network interface limit."

To investigate, I checked the Network Interfaces section in the AWS console and found a large number of ENIs (Elastic Network Interfaces). These were categorized into two types:

Available – Not currently in use
In-use – Actively attached to resources

I believe that cleaning up the Available ENIs could resolve the issue. However, I have a question: If I delete all "Available" ENIs, could it impact any of my production services?

Topics
ComputeNetworking & Content Delivery
Tags
Amazon VPCAmazon EC2
Language
English

asked 2 years ago536 views

1 Answer
1

Hello.

ENIs created by ECS or Glue cannot be deleted if they are in use.
It is automatically deleted when the ECS task ends or the Glue job completes.
Therefore, I think it is better to increase the quota as stated in the error message instead of deleting it.
https://docs.aws.amazon.com/vpc/latest/userguide/amazon-vpc-limits.html#vpc-limits-enis

In the case of Glue, the following documentation may be helpful.
https://repost.aws/knowledge-center/glue-specified-subnet-free-addresses

EXPERT

answered 2 years ago

EXPERT

reviewed 2 years ago

  • KARTHIK PT
    2 years ago

    I noticed that there are 678+ ENIs with the status "Available." For testing purposes, I deleted a Stage Glue ENI that was also in Available status, and everything continued to work as expected.

    My only question is: If I delete all "Available" ENIs, could it impact any of my services?

  • Riku_Kobayashi EXPERT
    2 years ago

    If the Glue job is not running, it is safe to delete all ENIs. However, if you delete an ENI while a job is running (likely, you won't be able to delete one that is associated with the job), it may affect the job's operation.

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