Re: Confusing error when s6-svstat version newer than s6-supervise

From: Laurent Bercot <>
Date: Thu, 22 Oct 2015 23:56:17 +0200

On 22/10/2015 23:08, Patrick Mahoney wrote:
> I suppose that means when upgrading major version numbers, I should restart the
> entire supervision tree.

  Yes. Generally, I recommend always using the binaries of the
*same* version of the package, but for long-running processes such
as the supervision tree, it's usually not a problem to not restart

  I don't like API/ABI changes, but this one was more or less
necessary, so yes, in this case you have to restart the supervision
tree, sorry. I try to keep major version number changes to a minimum.

> But the 'Broken pipe' error message in this case seems misleading.

  It's a skalibs thing: it reports EPIPE on short reads, i.e. getting
EOF before the expected length of data. I find it's a very convenient
error code to use, though I agree the error message is confusing out
of context.

Received on Thu Oct 22 2015 - 21:56:17 UTC

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