HTTP/1.1 401 Unauthorized error while connecting to ec2.eu-central via chaos monkey.

[Tarun Jain]

2015-01-19 05:37:05.028 - DEBUG SLF4JLogger - [SLF4JLogger.java:61] Sending request -1804412292: POST https://ec2.eu-central-1.amazonaws.com/ HTTP/1.1
2015-01-19 05:37:05.029 - DEBUG SLF4JLogger - [SLF4JLogger.java:61] >> "Action=DescribeInstances&Signature=Ao5fLfM%2B/rOcbdll0LF0K2F9U8NBlgd%2BAwuFk83GOxo%3D&SignatureMethod=HmacSHA256&SignatureVersion=2&Timestamp=2015-01-19T10%3A37%3A05.024Z&Version=2010-06-15&AWSAccessKeyId=xxx"
2015-01-19 05:37:05.029 - DEBUG SLF4JLogger - [SLF4JLogger.java:61] >> POST https://ec2.eu-central-1.amazonaws.com/ HTTP/1.1
2015-01-19 05:37:05.029 - DEBUG SLF4JLogger - [SLF4JLogger.java:61] >> Host: ec2.eu-central-1.amazonaws.com
2015-01-19 05:37:05.030 - DEBUG SLF4JLogger - [SLF4JLogger.java:61] >> Content-Type: application/x-www-form-urlencoded
2015-01-19 05:37:05.030 - DEBUG SLF4JLogger - [SLF4JLogger.java:61] >> Content-Length: 225
2015-01-19 05:37:05.609 - DEBUG SLF4JLogger - [SLF4JLogger.java:61] Receiving response -1804412292: HTTP/1.1 401 Unauthorized
2015-01-19 05:37:05.610 - DEBUG SLF4JLogger - [SLF4JLogger.java:61] << HTTP/1.1 401 Unauthorized

It is using signature version v2 and eu-central-1 requires v4.
How can we set signature version to v4? Or How to exclude this region to remove this error? Did anyone resolve this issue? Any help would greatly be appreciated.

[mrdlmndr]

I am having this issue now, did you ever find a fix for this?

[ebukoski]

PR #198 bumped the AWS SDK to 1.10.5.1 from the previous 1.8.11.

AWS SDK 1.9.2 added support for eu-central-1 (Frankfurt).

So it is possible the SDK bump resolved this issue.

Closing this issue as it is old and has not been updated in 8 months. Please re-open this issue if it is still occurring.