cloudformation: create_stack raises 505 if userdata > 9000 bytes. #1037

aranhoide opened this Issue Oct 8, 2012 · 1 comment


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I'm getting the following error when trying to create a CloudFormation stack in boto 2.6, if I create a stack that includes an EC2 instance with user-data larger than 9000 bytes:

File "/usr/local/lib/python2.7/dist-packages/boto-2.6.0-py2.7.egg/boto/cloudformation/", line 208, in create_stack
  raise self.ResponseError(response.status, response.reason, body)
boto.exception.BotoServerError: BotoServerError: 505 HTTP Version Not Supported

In boto 2.5 I got the stack created with no errors. Using git bisect, I narrowed the introduction of this issue down to the following change:

commit a7116e8be79971a89be7818d61a8e820bb3b0e09
Author: James Saryerwinnie <[e-mail redacted out]>
Date:   Mon Jul 9 11:24:28 2012 -0700

    Switch cloudformation over to sigv4


@jamesls jamesls added a commit to jamesls/boto that referenced this issue Nov 6, 2012
@jamesls jamesls Add failing integration test for sigv4 failure
This repros #1037.
the boto project member

I believe this is fixed now from #1081.

The root cause was a bug in the sigv4 implementation (I've added an integration test that calls create_stack with large template sizes that catches this issue so we shouldn't run into this again).

Let me know if you're still running into problems with the latest changes.

@jamesls jamesls closed this Nov 6, 2012
@msabramo msabramo pushed a commit to msabramo/boto that referenced this issue Nov 28, 2012
@jamesls jamesls Add failing integration test for sigv4 failure
This repros #1037.
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