https://bugzilla.mindrot.org/show_bug.cgi?id=3850

Darren Tucker <[email protected]> changed:

           What    |Removed                     |Added
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                 CC|                            |[email protected]

--- Comment #1 from Darren Tucker <[email protected]> ---
I'm not sure ssh is behaving unreasonably here: you explicitly told
multiple parallel instances of it to modify the same file:

> while ! xargs -r -P ${jobs} -I '{}' ssh -4 -n -o 
> StrictHostKeyChecking=accept-new -o ConnectTimeout=2 {}

One way to avoid this is to use the TOKEN expansion for
UserKnownHostsFile (which was added in v8.4) to put each host into its
own file based on hostname:

   UserKnownHostsFile ~/.ssh/known_hosts.d/%h

or hostkey:

   UserKnownHostsFile ~/.ssh/known_hosts.d/%k

either in your ~/.ssh/config or, in your use case, more likely as an -o
option to ssh in the script.

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