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From Steve Loughran <ste...@hortonworks.com>
Subject Re: finding free ports for tests
Date Thu, 09 Apr 2015 19:46:48 GMT

On 8 Apr 2015, at 20:19, Hari Shreedharan <hshreedharan@cloudera.com<mailto:hshreedharan@cloudera.com>>
wrote:

One good way to guarantee your tests will work is to have your server bind to an ephemeral
port and then query it to find the port it is running on. This ensures that race conditions
don’t cause test failures.


yes, that's what I'm doing; the classic tactic. Find the tests fail if the laptop doesn't
know its own name, but so do others


Thanks,
Hari



On Wed, Apr 8, 2015 at 3:24 AM, Sean Owen <sowen@cloudera.com<mailto:sowen@cloudera.com>>
wrote:

Utils.startServiceOnPort?

On Wed, Apr 8, 2015 at 6:16 AM, Steve Loughran <stevel@hortonworks.com<mailto:stevel@hortonworks.com>>
wrote:
>
> I'm writing some functional tests for the SPARK-1537 JIRA, Yarn timeline service integration,
for which I need to allocate some free ports.
>
> I don't want to hard code them in as that can lead to unreliable tests, especially on
Jenkins.
>
> Before I implement the logic myself -Is there a utility class/trait for finding ports
for tests?
>
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