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https://issues.apache.org/jira/browse/DISPATCH-218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15154214#comment-15154214
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Alan Conway commented on DISPATCH-218:
--------------------------------------

The LDAP lookups were caused by my sssd.conf setup which was looking up user 
names via LDAP. It is not clear *why* qdrouterd would do this on start-up 
before any connections are made. I can eliminate them by disabling ldap in 
/etc/sssd.conf or with `authconfig --disableldap --updateall` or by stopping 
sssd.

We still need to investigate whether all these calls are *necessary* in an 
LDAP-enabled environment. It's ok for the security layer to do extra work when 
that is needed, but it is not ok for the mere presence of the security layer to 
add significant overhead even when it is not being used.

> Dispatch system tests run very slowly if connected to a VPN
> -----------------------------------------------------------
>
>                 Key: DISPATCH-218
>                 URL: https://issues.apache.org/jira/browse/DISPATCH-218
>             Project: Qpid Dispatch
>          Issue Type: Bug
>          Components: Tests
>    Affects Versions: 0.5
>            Reporter: Alan Conway
>            Assignee: Alan Conway
>             Fix For: 0.6
>
>
> The dispatch system tests (e.g. system_tests_management) run very slowly when 
> connected to a VPN.
> -  about 10x slower on VPN configured to use TCP connection
> -  about 5x slower on VPN configured for UDP connection
> Wireshark shows unexpected LDAP and DNS queries on the VPN interface. 
> `wallace` below is the local host name, but is not mentioned in any tests so 
> must be picked up by proton or dispatch at runtime:
> {code}
> 1     0.000000000     10.3.113.108    10.11.6.1       LDAP    242     
> searchRequest(11) "dc=redhat,dc=com" wholeSubtree 
> 2     0.035161000     10.3.113.108    10.5.30.160     DNS     72      
> Standard query 0xd03f  A wallace.lab.bos.redhat.com
> {code}



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