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deployment-puppetmaster puppet fails due to "Could not render to Puppet::Network::Format[msgpack]: undefined method `to_msgpack' for #<Puppet::Util::TagSet:0x007f56e728de68>"
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Description

Error: Could not retrieve catalog from remote server: Error 400 on SERVER: Could not render to Puppet::Network::Format[msgpack]: undefined method `to_msgpack' for #<Puppet::Util::TagSet:0x007f56e728de68>

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hashar claimed this task.
hashar added subscribers: Joe, hashar.

@Joe has been experimenting using msgpack instead of json/yaml or pson for puppet communication.

I have recommended beta-cluster as a playground area, the patch is https://gerrit.wikimedia.org/r/#/c/286141/ and got removed after the test (or should have :)

I had to uninstall the ruby-msgpack package to make it work again