How to set up Crowd in AWS VPC (currently getting 'Unable to resolve this machine's hostname' error)?

Question

Hi,

My JIRA instance is hosted on a Linux AWS ec2 instance connected to a AWS RDS database in the VPC. I am trying to install Crowd on that same instance / database in the VPC.

I get this error when going through the installation wizard on the 'Default Administrator page'

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NEW:

Even though the IP address is different (I am just re-using a screenshot I took on another EC2 instance), the Private IP in the red rectangle is the IP it is refering to in the error message above:

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Does anyone know how to get around this?

Thank you!

Izumi.

Izumi Berat · Answer

@Nic Broughand @Caspar Krieger- Thank you for helping out. I added a screenshot in the issue description. The IP address it is referring to is the Private IP address of the VPC the EC2 instance is part of. The Public IP address to access the instance is different. I guess that in the case of a VPC (Amazon Virtual Private Cloud), the initial IP address of the instance is the Private IP, on top of which get added the Public IP. If this is the case, this might be connected to a bug in crowd that doesn't allow to change IP addresses.

Caspar Krieger · Answer

In addition to what Nic said, if ip-10-0-0-37 is meant to be your machine's hostname, check that your machine can correctly resolve it to 127.0.0.1 or as the ip which you intend it presents to the world.

Nic Brough -Adaptavist- · Answer

That's not a valid IP address, or your computer is unable to find it in DNS.  You've entered the string ip-10-0-0-37, did you mean to enter a proper address of 10.0.0.37, or do you really mean you've got a server called ip-10-0-0.37?