[Dovecot] accumulating orphaned processes

[Jeff Gustafson]

	I'm getting orphaned processes on our mail servers. Some machines has
processes hanging around from a week ago. I'm running the current stable
of dovecot 2.1.15, but the problem has been happening for a while now. I
thought it would be good to report the issue. 
	I ran an strace on one of them and this is the output:

Process 21370 attached - interrupt to quit
open("/var/run/dovecot/stats-mail", O_WRONLY) = 7
write(7, "DISCONNECT\ta09ade0350d81d517a530"..., 44) = 44
munmap(0x7f1ad8a8d000, 266240)          = 0
close(13)                               = 0
close(12)                               = 0
epoll_ctl(9, EPOLL_CTL_DEL, 11, {0, {u32=17384128, u64=17384128}}) = 0
close(11)                               = 0
close(7)                                = 0
munmap(0x7f1ada5d6000, 2106272)         = 0
munmap(0x7f1ada7d9000, 2161360)         = 0
munmap(0x7f1ada3cf000, 2124136)         = 0
munmap(0x323c800000, 2162768)           = 0
munmap(0x7f1ad9fc8000, 2102976)         = 0
munmap(0x7f1ada1ca000, 2114728)         = 0
epoll_ctl(9, EPOLL_CTL_DEL, 4, {0, {u32=17319120, u64=17319120}}) = 0
close(4)                                = 0
close(8)                                = 0
close(9)                                = 0
exit_group(0)                           = ?
Process 21370 detached

	As you can see, the process exited at that point. Any ideas?

...Jeff