Github user HyukjinKwon commented on the issue: https://github.com/apache/spark/pull/20146 Yea, that looks due to time limit. I am seeing sometimes it hit the time limit issue. The problem is, it's kind of difficult to increase the build time (see also https://github.com/appveyor/ci/issues/517). I already increased it from 1 to 1.5 hours before and looks they encourage to split the tests when it hits the time limit which is quite difficult for our case because it takes most of time when it builds. It probably wouldn't not happen often in the master branch build because they allow cache but the cache does not work in PR builder. Usually I tried to reduce the time it takes in SparkR tests (for instance, https://github.com/apache/spark/pull/19816). I was thinking we have 20ish mins left given the AppVeyor build history (https://ci.appveyor.com/project/ApacheSoftwareFoundation/spark/history) given my observation so far. So I roughly guess the time limit issue is temporarily happening in the AppVeyor .. can you close and reopen it here to retrigger the AppVeyor build?
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