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https://issues.apache.org/jira/browse/MESOS-7509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16211060#comment-16211060
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Qian Zhang commented on MESOS-7509:
-----------------------------------
For the test {{ROOT_INTERNET_CURL_PortMapper}}, the root cause that it fails on
CentOS 6 is, we need iptables 1.4.20 or higher for our port-mapper CNI plugin
(we have mentioned it in our
[doc|https://github.com/apache/mesos/blob/master/docs/cni.md#a-port-mapper-plugin-for-cni-networks]),
however in CentOS 6, the version of iptables is just 1.4.7 (you can see it in
the attached log in this ticket), that's why the task fails.
For the test {{ROOT_DOCKER_DefaultDNS}}, the attached log does not show much
useful info about why the task fails. However to run this test successfully, we
need Docker version >= 1.9.0 (see
[here|https://github.com/apache/mesos/blob/1.4.0/src/docker/docker.cpp#L997]
for details), I am not sure what the Docker version is in our CI CentOS 6
machine, if it < 1.9.0, the task will definitely fail, that might be the root
cause.
Basically, I agree to disable these two tests on CentOS 6 since the iptables
version on it is too old and Docker has already [dropped support for CentOS
6|https://github.com/docker/docker/issues/14365].
> CniIsolatorPortMapperTest.ROOT_INTERNET_CURL_PortMapper fails on some Linux
> distros.
> ------------------------------------------------------------------------------------
>
> Key: MESOS-7509
> URL: https://issues.apache.org/jira/browse/MESOS-7509
> Project: Mesos
> Issue Type: Bug
> Components: containerization
> Environment: CentOS 6, Ubuntu 12.04
> Reporter: Alexander Rukletsov
> Labels: containerizer, flaky-test, isolation, mesosphere
> Attachments: ROOT_DOCKER_DefaultDNS-badrun.txt,
> ROOT_INTERNET_CURL_PortMapper-badrun.txt,
> ROOT_INTERNET_CURL_PortMapper_failure_log_1.txt,
> ROOT_INTERNET_CURL_PortMapper_failure_log_2_centos6.txt
>
>
> I see this test failing consistently on CentOS 6 and Ubuntu 12.04.
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