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fixes:
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Fixes the error handling of multipathd service startup/discovery process.
IPA handles both scenario when the multipathd service is already started
and the scenario when the service has not been started and in the second
scenario IPA will try to start the service. IPA is not checking whether
multipathd is running already and not, it will start the multipathd service
even it is already running and expects 0 error code even if the service
is already running. It has been noticed that with certain combinations of
distros and multipathd versions the error code is not 0 when IPA tries
to start multipathd when an instance of multipathd is already running.
When the expected return code is not 0 that causes an exception and that
will cause the multipath device discovery to terminate prematurely and
if the selected root device is a multipath device then IPA won't be
able to provision. This fix discards the exception that is caused by the
non 0 error code returned by the multipathd startup process. In case there
is a genuine issue with the multipath service, that would be caught when
the actual multipath device listing command is executed (multipath -ll).
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