[Dovecot] Dovecot 1.0beta8 dovecot-auth consumes 100% CPU time on Solaris 10 amd64

[Tore André Klock]

Timo Sirainen wrote:
> Is it possible that you could try this without auth_bind to see if the
> bug is in it or elsewhere in LDAP authentication?
I switched to the mode where it will look up the hashed (in my case SHA)
password, using a single user to bind to the directory.
dovecot_auth still consumes ~100% cpu time eventually, but it seemed to take
longer to get there (not very scientific, I know).

Truss output looks like this, which is about the same as before:
 0.0010 pollsys(0x00467DC0, 10, 0xFFFFFD7FFFDFFAD0, 0x00000000) = 1
 0.0011 pollsys(0xFFFFFD7FFFDFF6B0, 5, 0xFFFFFD7FFFDFF690, 0x00000000) = 0
 0.0011 pollsys(0xFFFFFD7FFFDFF6B0, 5, 0xFFFFFD7FFFDFF690, 0x00000000) = 0
 0.0011 pollsys(0x00467DC0, 10, 0xFFFFFD7FFFDFFAD0, 0x00000000) = 1
 0.0012 pollsys(0xFFFFFD7FFFDFF6B0, 5, 0xFFFFFD7FFFDFF690, 0x00000000) = 0
 0.0012 pollsys(0xFFFFFD7FFFDFF6B0, 5, 0xFFFFFD7FFFDFF690, 0x00000000) = 0
 0.0012 pollsys(0x00467DC0, 10, 0xFFFFFD7FFFDFFAD0, 0x00000000) = 1

You mentioned maybe "some connection is talking to Dovecot constantly".  Is
there a way I can track down what that might be?  I assume you are talking about
a socket, but without knowing what to look for I can't see anything unusual in
the netstat output.

> If you can't solve this in Dovecot's side, you could still use pam_ldap
> instead.
Unfortunately I'm new to Solaris, so it will take me a little longer to test that.

Thank you for your remarkably quick response.  I will look into setting up PAM
as you suggested.

- Tore