[Dovecot] dovecot-auth consumes 100% CPU time on Solaris 10

[KOT MATPOCKuH]

I tried to make dovecot with configure --with-ioloop=select and same result:
[skipped]
pollsys(0xFFBFF888, 8, 0xFFBFF950, 0x00000000)  = 1
pollsys(0xFFBFF4D8, 5, 0xFFBFF458, 0x00000000)  = 0
pollsys(0xFFBFF4D8, 5, 0xFFBFF458, 0x00000000)  = 0
pollsys(0xFFBFF888, 8, 0xFFBFF950, 0x00000000)  = 1
pollsys(0xFFBFF4D8, 5, 0xFFBFF458, 0x00000000)  = 0
pollsys(0xFFBFF4D8, 5, 0xFFBFF458, 0x00000000)  = 0
[skipped to forever]
and 100% of CPU time.

May be problem is in select() (poll() ?) call with unnecessary file
descriptor, who always ready (may be connection to LDAP server?) ?