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awslabs / amazon-kinesis-video-streams-producer-sdk-cpp

Amazon Kinesis Video Streams Producer SDK for C++ is for developers to install and customize for their connected camera and other devices to securely stream video, audio, and time-encoded data to Kinesis Video Streams.
Apache License 2.0
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[QUESTION] Any Insights with DNS resolve timeouts #624

Closed suggestedfixes closed 3 years ago

suggestedfixes commented 3 years ago 
2020-12-04 19:43:32 ERROR   blockingCurlCall(): Curl perform failed for url https://${CREDENTIALS_ENDPOINT}.credentials.iot.us-east-2.amazonaws.com/role-aliases/1C8259188943/credentials with result Timeout was reached : Resolving timed out after 3511 milliseconds

But when we do a nslookp ${CREDENTIALS_ENDPOINT}.credentials.iot.us-east-2.amazonaws.com

# nslookup -debug ${CREDENTIALS_ENDPOINT}.credentials.iot.us-east-2.amazonaws.com
Server:         8.8.8.8
Address:        8.8.8.8:53

Query #0 completed in 209ms:
Non-authoritative answer:
Name:   ${CREDENTIALS_ENDPOINT}.credentials.iot.us-east-2.amazonaws.com
Address: 3.128.77.168
Name:   ${CREDENTIALS_ENDPOINT}.credentials.iot.us-east-2.amazonaws.com
Address: 3.19.113.0
Name:   ${CREDENTIALS_ENDPOINT}.credentials.iot.us-east-2.amazonaws.com
Address: 18.218.205.169

Query #1 completed in 2532ms:
Non-authoritative answer:
Name:   ${CREDENTIALS_ENDPOINT}.credentials.iot.us-east-2.amazonaws.com
Address: 2600:1f00:6000::12da:cda9
Name:   ${CREDENTIALS_ENDPOINT}.credentials.iot.us-east-2.amazonaws.com
Address: 2600:1f00:6000::380:4da8
Name:   ${CREDENTIALS_ENDPOINT}.credentials.iot.us-east-2.amazonaws.com
Address: 2600:1f00:6000::313:7100

It's getting back an ipv4 answer in 426ms and ipv6 answer in 2532 ms, it might be that the ipv6 is approaching the timeout. I wonder if there is anything we can do to disable ipv6 from the SDK, or increase IoT credentials timeouts?

Apologize ahead of time as I'm not familiar with the codebase.

suggestedfixes commented 3 years ago

Just to add a stir to the mix, the IoT credentials provider works on the same device for WebRTC

suggestedfixes commented 3 years ago

Did some tracing: https://github.com/awslabs/amazon-kinesis-video-streams-producer-c/blob/7f4ea67b667217670cd90a6bc119e11dd6f12f9b/src/source/Common/IotCredentialProvider.h#L11

disa6302 commented 3 years ago

Closing since this ticket has gone stale.