Hi Paul,

On Fri, 2021-05-28 at 09:42 +0100, Paul Barker wrote:

These changes replace the old XML-based RPC system in prserv with the
new asyncrpc implementation originally used by hashserv. A couple of
improvments are required in asyncrpc to support this.

I finally stumbled across the issue which led to the hanging builds
seen on the autobuilder when testing the initial RFC series.
It was a fairly dumb mistake on my behalf and I'm not sure how it
didn't trigger in my initial testing! The
`PRServerClient.handle_export()` function was missing a call to
`self.write_message()` so the client just ended up stuck waiting for a
response that was never to come. This issue is fixed here.

I've ran these changes through both `bitbake-selftest` and
`oe-selftest -a` and all looks good on my end. A couple of failures
were seen in oe-selftest but these are related to my host system
configuration (socat not installed, firewall blocking ports, etc) so
I'm fairly confident they aren't caused by this patch series.

Thanks for these. Unfortunately I think there is still a gremlin somewhere
as this was included in an autobuilder test build that is showing as this:

https://autobuilder.yoctoproject.org/typhoon/#/builders/83/builds/2203

i.e. all four selftests have not finished and I'd have expected them to 
by now.

I'm trying not to work today so I haven't debugged them or confirmed where
they are hanging but it seems likely related.

Cheers,

Richard