Red Hat Bugzilla – Bug 433591
[RHEL5.2] Slow startup with round-robin DNS entries
Last modified: 2008-09-08 02:51:12 EDT
Description of problem:
If the DNS name for the GAL server is a round-robin resource record, evolution
startup takes ages. Evolution tries to contact all servers and timeout is to
high if one of those servers is not reachable.
In this environment the GAL server is round-robin for failover and roaming users
(they are always able to connect to a GAL server).
Version-Release number of selected component (if applicable):
always if GAL server is rr-DNS entry and some of them are unreachable.
Steps to Reproduce:
1. point GAL server to a round-robin DNS entry
2. make sure, some of those servers are not reachable
3. start evolution
startup takes ages, dependent of the number of round-robin entries and
1) evolution should have a shorter timeout if only some of the servers are not
2) evolution should recognize unreachable servers and should not to try to
connect to unreachable servers as long as other servers are reachable.
I will add an strace
Please use something like this iptables rule for testing:
iptables -I INPUT -s <IP-of-exchange> -j DROP
Some of the servers are not reachable and do not return ICMP error messages.
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release. Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products. This request is not yet committed for inclusion in an Update
Development Management has reviewed and declined this request. You may appeal
this decision by reopening this request.