proxy_pass not passing to dynamic $host

[nehay2j]

Thanks Francis.
I am making a GET call through browser like- 
https://example.com/ec2..com

Error Logs-

2013/11/01 01:33:49 [error] 13086#0: *1 no host in upstream
"/ec2-xx-xxx-xxx-xxx..amazonaws.com:8080/test",
client: 10.10.4.167, server: clarity-test.cloud.tibco.com, request: "GET
/ec2-xx-xx-xxx-xx..amazonaws.com HTT
P/1.1", host: "example.com"


Regards,
Neha

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,244308,244310#msg-244310