Github user felixcheung commented on the issue:
https://github.com/apache/spark/pull/21584
looks like test failed
```
- Run SparkR on simple dataframe.R example *** FAILED ***
The code passed to eventually never returned normally. Attempted 70 times
over 2.0071955115 minutes. Last failure message: Failure executing: GET at:
https://192.168.39.28:8443/api/v1/namespaces/3346b714f192421eaae8d115154cec0e/pods/spark-test-app-da59d78dbe144e7e84581429199be99a/log?pretty=false.
Message: container "spark-kubernetes-driver" in pod
"spark-test-app-da59d78dbe144e7e84581429199be99a" is waiting to start: image
can't be pulled. Received status: Status(apiVersion=v1, code=400, details=null,
kind=Status, message=container "spark-kubernetes-driver" in pod
"spark-test-app-da59d78dbe144e7e84581429199be99a" is waiting to start: image
can't be pulled, metadata=ListMeta(resourceVersion=null, selfLink=null,
additionalProperties={}), reason=BadRequest, status=Failure,
additionalProperties={}).. (KubernetesSuite.scala:221)
```
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