[Jenkins CI] Broken R Unit test during build

[sandeep-krishnamurthy]

@thirdwing

R GPU unit tests are failing more frequently on the master branch. Can you please take a look at this?
Example failed CI build - https://builds.apache.org/blue/organizations/jenkins/incubator-mxnet/detail/master/272/pipeline/

[sandeep-krishnamurthy]

@thirdwing Can we work on the fix to this soon? This issue is causing more frequent build failures.

[sandeep-krishnamurthy]

This is causing a new issue. All master builds are failing. Can we relook at it? @thirdwing

[thirdwing]

The problem is the command executed by Jenkins server is not the same with commands in Jenkinsfile.

For example, the command executed in https://builds.apache.org/blue/organizations/jenkins/incubator-mxnet/detail/master/287/pipeline/280

tests/ci_build/ci_build.sh cpu R CMD INSTALL --library=/workspace/ut-r-cpu/site-library mxnet_current_r.tar.gz

However, in our Jenkinsfile (https://github.com/apache/incubator-mxnet/blob/master/Jenkinsfile#L382):

sh "${docker_run} cpu R CMD INSTALL --library=/workspace/ut-r-cpu/site-library R-package"

Sorry that I don't know why they are different.

[cjolivier01]

Issue is thought to be resolved with this change