Github user felixcheung commented on the issue:
https://github.com/apache/spark/pull/20464
appveyor tests failed, could you close and reopen this PR to trigger it.
strange, I haven't seen anything like this on appveyor a long time.
```
1. Error: create DataFrame with complex types (@test_sparkSQL.R#535)
-----------
8712org.apache.spark.SparkException: Job aborted due to stage failure: Task
0 in stage 114.0 failed 1 times, most recent failure: Lost task 0.0 in stage
114.0 (TID 116, localhost, executor driver): java.net.SocketTimeoutException:
Accept timed out
```
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