Could not determine if the address tcp://selenium-hub:4442 is IPv6 or IPv4

[kelly chung]

Hi all,

I tried to use this set up with aws ecs

https://github.com/SeleniumHQ/docker-selenium/blob/trunk/docker-compose-v3.yml

I created a ecs task definition with containers defined in docker compose file above. 

The chrome node container was set up using the env variables:

• - SE_EVENT_BUS_HOST=selenium-hub
• - SE_EVENT_BUS_PUBLISH_PORT=4442
• - SE_EVENT_BUS_SUBSCRIBE_PORT=4443

The hub is working but the node cannot find it. It cannot find the hub. Both containers are running on same ec2 instance.

Getting this error: 
2022-01-21 16:23:28

21:23:28.574 WARN [UnboundZmqEventBus.lambda$new$4] - Failure #1. Retrying.

2022-01-21 16:23:28

21:23:28.576 WARN [UnboundZmqEventBus.isSubAddressIPv6] - Could not determine if the address tcp://selenium-hub:4442 is IPv6 or IPv4

2022-01-21 16:23:28

java.net.UnknownHostException: selenium-hub

2022-01-21 16:23:28

at java.base/java.net.InetAddress$CachedAddresses.get(InetAddress.java:797)

2022-01-21 16:23:28

at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1509)

2022-01-21 16:23:28

at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1368)

2022-01-21 16:23:28

at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1302)

2022-01-21 16:23:28

at java.base/java.net.InetAddress.getByName(InetAddress.java:1252)

2022-01-21 16:23:28

at org.openqa.selenium.events.zeromq.UnboundZmqEventBus.isSubAddressIPv6(UnboundZmqEventBus.java:169)

2022-01-21 16:23:28

at org.openqa.selenium.events.zeromq.UnboundZmqEventBus.lambda$new$6(UnboundZmqEventBus.java:124)

2022-01-21 16:23:28

at net.jodah.failsafe.Functions.lambda$toSupplier$10(Functions.java:262

Any help would be much appreciated

Thanks

Kelly

[Charles Smith]

Hi Kelly,

We are struggling with the same thing. We had Selenium 3.x running in AWS on an ecs cluster. We had the hub running and we have a selenium scalar service that would create nodes as we needed them. We do this by have a docker image for the different nodes chrome firefox etc.  all defined in a task definition. 

My issue is when we start the hub its up and running but when we start the nodes the hub gets 502 bad gateway and the nodes start-up and then die. They never register. 

If you make any progress let me know ill do the same.