[IVY-817] If DNS is playing up, Ivy takes a lot longer to sort project dependencies

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0-beta-2
• Fix Version/s: 2.0-RC1
• Component/s: Core

Environment

Ubuntu 8.04 with messed up DNS

• Assignee: Unassigned
• Reporter: Steve Loughran
• Created: 13/May/08 10:37
• Updated: 29/Apr/10 08:07
• Resolved: 19/May/08 17:40

Description

I've just upgraded to Ubuntu 8.04, and for reasons I dont fully understand. DNS is now very patchy; long pauses before responses coming in

running at -d level, the pauses happen after printing all the pauses, finishing when the Sort dependencies response comes in
[ivy-projects] Module descriptor is processed : org.smartfrog#sf-tasks;working@k2
[ivy-projects] Module descriptor is processed : org.smartfrog#smartfrog;working@k2

//insert 30s pause here

[ivy-projects] Sort dependencies of : org.smartfrog#sf-m32;working@k2 / Number of dependencies = 9

During resolution, the delay happens after the sort

[ivy:resolve] Module descriptor is processed : org.apache.ant#ant;1.7.0
[ivy:resolve] Sort done for : org.apache.ant#ant-apache-regexp;1.7.0
[ivy:resolve] Sort dependencies of : org.apache.ant#ant-apache-resolver;1.7.0 / Number of dependencies = 3

//here is where the delay is

[ivy:resolve] Module descriptor is processed : org.apache.ant#ant;1.7.0
[ivy:resolve] Sort done for : org.apache.ant#ant-apache-resolver;1.7.0
[ivy:resolve] Sort dependencies of : org.apache.ant#ant-commons-logging;1.7.0 / Number of dependencies = 3

-I'm not sure why dns/rdns should be needed during a sort, unless remote repositories are being polled. I'm also surprised, as java caches DNS responses by default.

Issue Links

• is related to: HADOOP-3426 Datanode does not start up if the local machines DNS isnt working right and dfs.datanode.dns.interface==default