How to Fix an AWS Glue S3 VPC Gateway Endpoint Error?
A data engineer is configuring an AWS Glue job to read data from an Amazon S3 bucket. The data engineer has set up the necessary AWS Glue connection details and an associated IAM role. However, when the data engineer attempts to run the AWS Glue job, the data engineer receives an error message that indicates that there are problems with the Amazon S3 VPC gateway endpoint. The data engineer must resolve the error and connect the AWS Glue job to the S3 bucket. Which solution will meet this requirement?
Community Votes
100% of anonymous learners picked answer D. Votes are pick records left by other test-takers — they are not the verified answer.
Community Insight
This question tests VPC connectivity from serverless AWS Glue to Amazon S3; the trap is treating an S3 gateway endpoint like a security-group-managed resource instead of a route-table target.
An AWS Glue job that reads from Amazon S3 over a VPC fails with an Amazon S3 VPC gateway endpoint error; the requirement is to restore connectivity by verifying the endpoint's route table entry (D). This analysis confirms why security group, bucket policy, and FQDN changes leave the routing problem unresolved.
Option A is the classic trap: engineers add an inbound rule to a Glue security group, but gateway endpoints are not traffic sources for security groups, and Glue serverless jobs do not need inbound S3 rules; the missing S3 prefix-list route is the real cause.
Community Discussion (15 comments)
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Expert Analysis
Why the Answer Is Correct
D is correct because the failure is a VPC routing problem, not an IAM or connection-string problem. An Amazon S3 gateway endpoint is associated with route tables, and the subnet that hosts the AWS Glue job's elastic network interfaces must have a route whose destination is the S3 prefix list (for example, pl-xxxxxxxx) and whose target is the VPC endpoint (vpce-xxxxxxxx). Without that route, traffic from the Glue job to the S3 bucket has no path, which matches the reported endpoint error. The option's phrase "inbound and outbound routes" is technically loose, as GiorgioGss points out: "when we define a S3 gateway endpoint we must have proper routes in place." The intent is clear, so verifying the route table is the action that resolves the error.Why the Other Options Are Wrong
A fails because a VPC gateway endpoint is not a security-group-scoped source; security groups apply to ENIs and are stateful, and Glue does not need inbound rules from an S3 endpoint. As HunkyBunky says, "AWS glue - are serverless service, so it don't have any security groups" (a Glue connection can attach security groups for its ENIs, but they do not gate S3 gateway endpoint traffic). B fails because the IAM role already grants the Glue job permission; an S3 bucket policy is resource-based access control that typically matters for cross-account scenarios and would surface as Access Denied, not as an endpoint error. C fails because S3 connections use s3://bucket/prefix, while an FQDN is required for JDBC or similar connection types; the error explicitly names the Amazon S3 VPC gateway endpoint.Community Comment Notes
Learners overwhelmingly choose D, but several refine the wording. ampersandor advises checking that "the subnet configured for your AWS Glue connection has an Amazon S3 VPC gateway endpoint" or a NAT route in its route table, which is the practical validation step. teo2157 votes C yet argues the route must exist in the subnet assigned to the Glue job rather than only in a central VPC route table, and notes that route tables have no inbound or outbound concept. Aesthet linked the official AWS Glue VPC endpoint and S3 connection docs, which confirm the routing dependency. These nuances do not change the answer: the actionable fix is still validating the S3 gateway endpoint route.Official Reference
Exam Strategy
When a Glue job hits a VPC endpoint error, first identify which component the error names and check that component's configuration before touching IAM or the job script. For an S3 gateway endpoint, confirm the subnet route table that serves the Glue ENIs has the S3 prefix-list route, and remember that Glue jobs run serverless with networking defined by the connection.
Frequently Asked Questions
Why is the S3 VPC gateway endpoint route table the fix for an AWS Glue job error?
An S3 gateway endpoint is attached to route tables; the Glue job's subnet needs a route to the endpoint's S3 prefix list so packets can reach S3 without a NAT or internet gateway.
Why not update the AWS Glue security group for an S3 gateway endpoint?
Glue serverless jobs do not use a security group to reach S3 through a gateway endpoint; gateway endpoints rely on route tables, so inbound security group rules do not apply.
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