Github user oknet commented on the issue:
https://github.com/apache/trafficserver/pull/947
The InactivityCop will handle those netvc that read or write disabled.
InactivityCop will send TIMEOUT to SM or call close_UnixNetVConnection() to
close netvc directly depend on the last call to do_io_read and do_io_write.
To disable read and write but only handle Timeout Event:
do_io_read(sm, 0, NULL) and do_io_write(sm, 0, NULL)
The sm will receive TIMEOUT from InactivityCop and reset timeout or close
netvc.
To disable read and write and ignore timeout:
do_io_read(NULL, 0, NULL) and do_io_write(NULL, 0, NULL)
The sm will not receive any Event from the netvc and InactivityCop will
close netvc while timeout.
Note:
The InactivityCop try to send TIMEOUT to read.vio._cont first and then
write.vio._cont if read.vio._cont is NULL.
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