[PIO-214] use openjdk8 as oraclejdk8 is no longer available in the default Travis build image

[reynoldsm88]

The build on develop is failing, likely because of the following change made by Travis-CI: Ubuntu Xenial 16.04 as the default Travis CI build environment. It's been referenced in several Travis CI questions about Oracle JDK 8 that the way to resolve the issues is to either force the build dist to use 'trusty', or we could switch to building with OpenJDK.

[takezoe]

Thanks! Could you create a ticket on JIRA if you don't mind so that we can track your contribution easily? It allows us to mention your contribution in the next release notes.
https://jira.apache.org/jira/projects/PIO/issues/

[reynoldsm88]

Sorry I apologize,

I already had one open and forgot to link.
https://jira.apache.org/jira/projects/PIO/issues/PIO-214?filter=allopenissues

From the description there:
The build on develop is failing, likely because of the following change made by Travis-CI: Ubuntu Xenial 16.04 as the default Travis CI build environment. It's been referenced in several Travis CI questions about Oracle JDK 8 that the way to resolve the issues is to either force the build dist to use 'trusty', or we could switch to building with OpenJDK.

[reynoldsm88]

@takezoe sorry, I had actually created an issue with a description and forgot to link to it here, it's in the comment above

[takezoe]

Thanks! I updated the subject of this pull request to include the number of JIRA ticket.

[reynoldsm88]

@takezoe is there anything else I need to do for this PR?

if you don't want to use openjdk the alternative is to simply set dist: trusty in the travis file. apparently Travis is planning on deprecating the trusty build images (hence the switch to xenial).

I've built both alternatives in my own branch and they seem to work. let me know what you think

[takezoe]

Nothing else. Thanks.

I want to assign the JIRA ticket to record your contribution, but I can't. If I remember correctly, we were able to assign JIRA tickets to contributors before. I'm looking forward to a way to do it now.

[takezoe]

@reynoldsm88 Sorry for taking a long time. I wanted to assign the JIRA ticket to you, but it seems to be impossible due to ASF policy. I just merged this pull request. Thanks for your contribution!