I found the poll in virEventPollRunOnce (vireventpoll.c), a
POLLHUP event occurred for a pipe descriptor, thus the poll always
returned because of it.( the pipe broken). this may be the
best I could track temporarily，I don't know what to do netx , to mask
the hangup event or to do something to handle the hangup event , what to do ? Is it a bug or something ?
any help would be appreciate. :)
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