Whatever we are using for DNS on those build slaves is redirecting any NXDOMAIN to a Level3 search domain.
Is this happening on the ubuntu-* slaves or on the dynamic build slaves? --David On Mon, Aug 10, 2015 at 8:59 AM, Keith W <keith.w...@gmail.com> wrote: > Hello Apache builds, > > We (Apache Qpid) have been seeing a test fail on the Ubuntu Jenkins slaves > since August 9th. The test verifies the behaviour of the code when the > user specifies a hostname that does not exist in DNS. For this purpose, > the test uses a random name 'hg3sgaaw4lgihjs' (without hierarchal part) > which is assumed not resolve. This test is longstanding and has been > running on the slaves for many years without issue. > > Between August 9th and 10th, something appears to have changed on the > slaves, which is meaning that the lookup of the name is now returning an > IP. This is causing the Java test to fail. I've investigated by > introducing shell commands into the job, and can see evidence of the same > problem at the UNIX level. I am certainly seeing this on slaves ubuntu4 > through ubuntu6. > > > $ host hg3sgaaw4lgihjs > hg3sgaaw4lgihjs has address 198.105.244.11 > hg3sgaaw4lgihjs has address 198.105.254.11 > Host hg3sgaaw4lgihjs not found: 3(NXDOMAIN) > > $ host hg3sgaaw4lgihjs2 > hg3sgaaw4lgihjs2 has address 198.105.244.11 > hg3sgaaw4lgihjs2 has address 198.105.254.11 > Host hg3sgaaw4lgihjs2 not found: 3(NXDOMAIN) > > > I considered changing the test to use a RFC-2606 Reserved Top Level DNS > Names hg3sgaaw4lgihjs.invalid but I notice that it too is resolving to > 198.105.244.11 too. The fact that an .invalid address is resolving makes > me suspect there is an environmental problem at the root cause. > > host hg3sgaaw4lgihjs.invalid > hg3sgaaw4lgihjs.invalid has address 198.105.244.11 > hg3sgaaw4lgihjs.invalid has address 198.105.254.11 > Host hg3sgaaw4lgihjs.invalid not found: 3(NXDOMAIN) > > Is there a name resolution issue affecting these hosts? > > Example job affected by the issue: > > https://builds.apache.org/view/M-R/view/Qpid/job/Qpid-Java-Java-Test-JDK1.8/ > > Kind regards, Keith Wall.
