Suddenly failing Travis CI

[pankajgupta]

https://travis-ci.org/twitter/cassovary/builds shows that version with git tag 5.1.1 suddenly started failing travis ci builds, and every build since then has failed with the same message:
error sbt.ResolveException: unresolved dependency: com.twitter.common#metrics;0.0.29: not found

This is particularly strange since doing
$ git diff 5.1.0 5.1.1
shows no change.

Further, I created a branch called old-state-good-travis which goes back to the tip at 5.1.0 and it now also fails Travis build. https://travis-ci.org/twitter/cassovary/builds/59096320

I'm out of ideas -- @caniszczyk : any help when you get a chance would be really appreciated.

[pankajgupta]

Created a new branch "new-travis-file" to play with different .travis.yml but doesn't seem to help. Throws the mysterious message while downloading metrics.jar. See https://travis-ci.org/twitter/cassovary/jobs/59100775
[warn] [FAILED ] com.twitter.common#metrics;0.0.29!metrics.jar: The HTTP response code for http://maven.twttr.com/com/twitter/common/metrics/0.0.29/metrics-0.0.29.jar did not indicate a success. See log for more detail. (1ms)

[pankajgupta]

Wonder if this is related to http://stackoverflow.com/questions/18208224/force-sbt-to-follow-redirects-for-an-explicit-github-releases-url

[travisbrown]

Hi @pankajgupta, I've just sent you an email about this issue—it's an intermittent problem with the maven.twttr.com repository that needs more investigation.

[pankajgupta]

Thanks for looking into it! I didn't seem to have gotten your email. Please
resend to pankaj@yogins.com

On Sunday, April 19, 2015, Travis Brown notifications@github.com wrote:

Hi @pankajgupta https://github.com/pankajgupta, I've just sent you an
email about this issue—it's an intermittent problem with the
maven.twttr.com repository that needs more investigation.

—
Reply to this email directly or view it on GitHub
#180 (comment).

[pankajgupta]

@travisbrown any suggested fixes apart from just including that jar in repo.

[travisbrown]

You can use - travis_retry sbt ++$TRAVIS_SCALA_VERSION test to make Travis retry the entire failed command three times—this has fixed the issue for us for other projects.

[caniszczyk]

@pankajgupta checking through your dependencies, why do you need something from maven.twttr.com? Can we refactor something to remove the dependency? That should help with the flakiness and in the future, maven.twttr.com will eventually go away

[travisbrown]

@caniszczyk At a glance it looks like it might not be too hard to remove the direct com.twitter.common dependencies here, but metrics is also needed by finagle-stats, which would be a lot harder to disentangle. We just need to start publishing this stuff to Maven Central.

[pankajgupta]

That's right. Currently, we are using finagle-stats which needs metrics.

I am not sure if retries will help. Looks like very single travis build has
failed in the last few days.

What again is the intermittent problem with maven.twttr.com -- is it
unsolvable ?

On Mon, Apr 20, 2015 at 7:54 AM, Travis Brown notifications@github.com
wrote:

@caniszczyk https://github.com/caniszczyk At a glance it looks like it
might not be too hard to remove the direct com.twitter.common
dependencies here, but metrics is also needed by finagle-stats, which would
be a lot harder to disentangle. We just need to start publishing this stuff
to Maven Central.

—
Reply to this email directly or view it on GitHub
#180 (comment).

[pankajgupta]

Solved for now by doing retries.