Re: [PATCH v1] migration: Wait for cpr.sock file to appear before connecting

[JAEHOON KIM <jhkim@linux.ibm.com>]

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On 6/6/2025 8:40 AM, Fabiano Rosas wrote:
> Jaehoon Kim<jhkim@linux.ibm.com> writes:
>
>> When the source VM attempts to connect to the destination VM's Unix
>> domain socket(cpr.sock) during CPR transfer, the socket file might not
>> yet be exist if the destination side hasn't completed the bind
>> operation. This can lead to connection failures when running tests with
>> the qtest framework.
>>
> Could you provide us the output of qtest in this case? Are you simply running
> make check or something else?

Yes, I'm simply running 'make check-qtest-s390x'.

Here's the qtest output from the failure:
  # {
  #     "error": {
  #         "class": "GenericError",
  #         "desc": "Failed to connect to '/tmp/migration-test-ZC7Z72/cpr.sock': No such file or directory"
  #     }
  # }
  not ok /s390x/migration/mode/transfer - ERROR:../tests/qtest/libqtest.c:1453:qtest_vqmp_assert_success_ref: assertion failed: (qdict_haskey(response, "return"))
  Bail out!

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