Internal Mails Stop Working After a While

[mintra]

Originally Posted by dkarp

One possibility: Make sure that the number of IMAP threads is sufficient to handle the number of active connections. (Each IMAP client may open multiple connections simultaneously, so don't be overly stingy here.) You can configure this number in the admin UI; it requires a tomcat server restart to take effect.

How many connections would you allow for per client? 3? 5? more?

Or should I just go for the max this server configuration could handle?

[dkarp]

Originally Posted by mintra

How many connections would you allow for per client? 3? 5? more?

Or should I just go for the max this server configuration could handle?

Let's try 4 and see if the issue resolves itself. A future version of the server will remove the thread-per-connection constraint, but for now it's still an issue.

[marcmac]

ping uses the order in /etc/nsswitch.conf - postfix (by default) only uses DNS.

If you want to set up a relay host for outgoing mail, you can disable DNS in the admin console for postfix, which will caues it to use the local value for LMTP delivery.

[mintra]

Ok following instructions on this thread
[SOLVED] DNS in a nutshell


I've setup Bind DNS server on the zimbra machine,

dig domain.com returns the local ip address of the server.

Lets see if it does the trick

[mintra]

command "host domain.com" now returns the internal ip address

The Mail Queues are alot smaller now.

only 2 internal messages in the queue, with this error.

(conversation with host.domain.com[private_ip_addr] timed out while sending end of data -- message may be sent more than once)

[mintra]

Still having problems.

After Machine running for 3 hours, it stops delivery again.

------------------ Zimbra Logs

A9F21D4623 4900 Fri Dec 2 12:21:19 userxyz@someweb.com
(delivery temporarily suspended: connect to host.domain.com[192.168.1.60]: read timeout)
user1@domain.com
--
A0FEFD461C 7895 Fri Dec 2 12:15:30 userxyz2@someweb.com
(connect to host.domain.com[192.168.1.60]: read timeout)
user2@domain.com

--
137FAD4617 5826 Fri Dec 2 12:10:05 userxyz3@someweb.com
(connect to host.domain.com[192.168.1.60]: read timeout)
user3@domain.com
--
6767DD4618 5826 Fri Dec 2 12:11:22 user4@domain.com
(connect to host.domain.com[192.168.1.60]: read timeout)
user4@domain.com


Any Ideas?

[mintra]

zmcontrol status

ldap Running
logger Running
mailbox Running
mta Running
snmp Running
spell Running

[KevinH]

What gets things going again? restarting tomcat/mailbox or restarting postfix/mta? If it's tomcat you might want to try "kill -QUIT <tomcat pid>" this will dump a stack trace in the catalina.out posting this may help us determine what tomcat is doing when it stops.

[mintra]

Don't know if this is any help, here is what I get

INFO: Pausing Coyote HTTP/1.1 on http-80
Dec 5, 2005 9:59:30 AM org.apache.coyote.http11.Http11Protocol pause
INFO: Pausing Coyote HTTP/1.1 on http-443
Dec 5, 2005 9:59:30 AM org.apache.coyote.http11.Http11Protocol pause
INFO: Pausing Coyote HTTP/1.1 on http-7071
Dec 5, 2005 9:59:31 AM org.apache.catalina.core.StandardService stop
INFO: Stopping service Catalina


(After a zmcontrol stop)

[KevinH]

Is there anything in the log when mail processing stops? Can you try a Kill -QUIT <tomcat pid> when this happens?