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https://issues.apache.org/jira/browse/KAFKA-2541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14742782#comment-14742782
 ] 

Bobby Tang commented on KAFKA-2541:
-----------------------------------

It turns out to be a DNS hijacking issue by ISP provider(Verizon). 

{code:title=default DNS server by Verizon}
bobbymac:kafka bobbytang$ nslookup some.invalid.hostname.foo.bar
Server:         192.168.1.1
Address:        192.168.1.1#53

Non-authoritative answer:
Name:   some.invalid.hostname.foo.bar
Address: 92.242.140.21
{code}

{code:title=opted out DNS servers which has NXDOMAIN redirection services 
turned}
bobbymac:kafka bobbytang$ nslookup some.invalid.hostname.foo.bar
Server:         192.168.1.1
Address:        192.168.1.1#53

** server can't find some.invalid.hostname.foo.bar: NXDOMAIN
{code}

For anyone who comes across same issue...
{code:title=opt out Verizon NXDOMAIN redirection services}
"This is expected bahavior.  The Verizon Online DNS resolvers have NXDOMAIN 
redirection services that redirect any unknown host to a sponsored search page. 
 You can opt out of this by changing your resolver from .12 to .14."
{code}
see details from 
https://forums.verizon.com/t5/FiOS-Internet/FIOS-DNS-Hack-Directed-to-unallocated-barefruit-co-uk92-242-140/td-p/723697



> Consistent failure of unit test cases 
> --------------------------------------
>
>                 Key: KAFKA-2541
>                 URL: https://issues.apache.org/jira/browse/KAFKA-2541
>             Project: Kafka
>          Issue Type: Bug
>          Components: consumer
>         Environment: Environments: Mac OSX and Ubuntu
>            Reporter: Bobby Tang
>            Assignee: Neha Narkhede
>            Priority: Minor
>
> Env 
> {code:title=Mac OSX} 
> $ sw_vers 
> ProductName:  Mac OS X 
> ProductVersion:       10.10.5 
> BuildVersion: 14F27 
> {code} 
> {code:title=Ubuntu} 
> ~/opensource/kafka$ lsb_release -a 
> No LSB modules are available. 
> Distributor ID:       Ubuntu 
> Description:  Ubuntu 12.04.5 LTS 
> Release:      12.04 
> Codename:     precise 
> {code} 
> {code:title=Failure test cases on Mac OS X}
> $ ./gradlew test
> org.apache.kafka.common.utils.AbstractIteratorTest > testIterator PASSED
> 376 tests completed, 3 failed
> :clients:test FAILED
> FAILURE: Build failed with an exception.
> * What went wrong:
> Execution failed for task ':clients:test'.
> > There were failing tests. See the report at: 
> > file:///Users/bobbytang/opensource/kafka/clients/build/reports/tests/index.html
> * Try:
> Run with --stacktrace option to get the stack trace. Run with --info or 
> --debug option to get more log output.
> BUILD FAILED
> KafkaConsumerTest. testConstructorClose
> KafkaProducerTest. testConstructorFailureCloseResource
> SelectorTest. testNoRouteToHost
> {code}
> {code:title=Failure test cases on Ubuntu}
> $ ./gradlew test
> 376 tests completed, 3 failed
> :clients:test FAILED
> FAILURE: Build failed with an exception.
> * What went wrong:
> Execution failed for task ':clients:test'.
> > There were failing tests. See the report at: 
> > file:///home/opensource/kafka/clients/build/reports/tests/index.html
> * Try:
> Run with --stacktrace option to get the stack trace. Run with --info or 
> --debug option to get more log output.
> BUILD FAILED
> Total time: 2 mins 24.664 secs
>     KafkaConsumerTest. testConstructorClose
>     KafkaProducerTest. testConstructorFailureCloseResource
>     SelectorTest. testNoRouteToHost
> {code}



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