extreamly slow "zmprov" execution

[jammy]

I'm not sure what's caused it, but it's taking an extreamly long time to run the zmsetup.pl script while it's doing updates:


----------------

Checking 3.1.2_GA

Tue Sep 12 20:13:16 2006: Checking 3.1.2_GA

Checking 3.1.3_GA

Tue Sep 12 20:13:16 2006: Checking 3.1.3_GA

Checking 3.1.4_GA

Tue Sep 12 20:13:16 2006: Checking 3.1.4_GA

Tue Sep 12 20:13:16 2006: Updating from 3.1.4_GA
Checking 3.2.0_M1

Tue Sep 12 20:13:17 2006: Checking 3.2.0_M1

Tue Sep 12 20:13:17 2006: Updating from 3.2.0_M1
Checking 3.2.0_M2

Tue Sep 12 21:29:53 2006: Checking 3.2.0_M2

Tue Sep 12 21:29:53 2006: Updating from 3.2.0_M2
Checking 4.0.0_RC1

Tue Sep 12 21:49:00 2006: Checking 4.0.0_RC1

Tue Sep 12 21:49:00 2006: Updating from 4.0.0_RC1

---------------------

Yes, that's over an hour to go from 3.2.0M1 to M2..

I've only got 1G of ram, and if someone can confirm that this is what's causing the problem i'm happy, but if there's something else wrong, i'd like to get it figured out.

[jammy]

I've tracked this down to ipv6. It seems that Zimbra is trying to do some ipv6 connections, which are all completely firewalled on my system, and it's taking time to timeout.

How do I completely disable ipv6 in zimbra/java/tomcat?

[Klug]

Did you try to disable it at the OS level ?

[KevinH]

Originally Posted by jammy

I've tracked this down to ipv6. It seems that Zimbra is trying to do some ipv6 connections, which are all completely firewalled on my system, and it's taking time to timeout.

How do I completely disable ipv6 in zimbra/java/tomcat?

Can you post some details on the ipv6 connections you think we are making? I'm pretty sure we don't do that on purpose.

[jammy]

it all seems to be stuff going to localhost.. connecting to some of the java tasks that are running.

INPUT:IN=lo OUT= MAC=00:00:00:00:00:00:00:00:00:00:00:00:86:dd SRC=0000:0000:0000:0000:0000:0000:0000:0001 DST=0000:0000:0000:0000:0000:0000:0000:0001 LEN=80 TC=0 HOPLIMIT=64 FLOWLBL=0 PROTO=TCP SPT=35420 DPT=36962 WINDOW=32752 RES=0x00 SYN URGP=0

[thmsk]

I've had the same problem with Zimbra 5.0.15 running on Ubuntu 8.0.4. The Ubuntu 8.0.4 itself runs as guest OS in an OpenVZ environment. That is not officially supported by Zimbra, but it works. Unfortunately, ipv6 in Debian's official ovz-kernel seems to be broken. And disabling ipv6 on OS level doesn't work.

I disabled ipv6 in Zimbra on application level by adding the option "-Djava.net.preferIPv4Stack=true" to some Zimbra shell scripts:

/opt/zimbra/bin/zmjava
/opt/zimbra/bin/zmjavaext
/opt/zimbra/libexec/zmjsprecompile
/opt/zimbra/bin/zmmailboxdctl

Just look for "-Xmx" and add the option "-Djava.net.preferIPv4Stack=true" at appropriate positions.

It would be great, if Zimbra would ask for ipv6 at install time or add an option like -noipv6, add a global variable to localconfig, and if the shell scripts, which start the Java apps would evaluate that variable.

[sevilla]

Do u need restart zimbra to apply the new changes to the scripts?