Re: QEMU migration-test CI intermittent failure

[Fabiano Rosas]

Peter Xu <peterx@redhat.com> writes:

> On Thu, Sep 14, 2023 at 12:57:08PM -0300, Fabiano Rosas wrote:
>> I managed to reproduce it. It's not the return path error. In hindsight
>> that's obvious because that error happens in the 'recovery' test and this
>> one in the 'plain' one. Sorry about the noise.
>
> No worry.  It's good to finally identify that.
>
>> 
>> This one reproduced with just 4 iterations of preempt/plain. I'll
>> investigate.

It seems that we're getting a tcp disconnect (ECONNRESET) on when doing
that shutdown() on postcopy_qemufile_src. The one from commit 6621883f93
("migration: Fix potential race on postcopy_qemufile_src").

I'm trying to determine why that happens when other times it just
returns 0 as expected.

Could this mean that we're kicking the dest too soon while it is still
receiving valid data?