Github user jerryshao commented on the issue:
https://github.com/apache/spark/pull/14043
Looks like there're some problem with build:
```
exec: curl -s -L
https://www.apache.org/dyn/closer.lua?action=download&filename=/maven/maven-3/3.3.3/binaries/apache-maven-3.3.3-bin.tar.gz
gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error is not recoverable: exiting now
exec: curl -s -L http://downloads.typesafe.com/zinc/0.3.5.3/zinc-0.3.5.3.tgz
exec: curl -s -L http://downloads.typesafe.com/scala/2.10.5/scala-2.10.5.tgz
Using `mvn` from path:
/home/jenkins/workspace/NewSparkPullRequestBuilder/build/apache-maven-3.3.3/bin/mvn
build/mvn: line 152:
/home/jenkins/workspace/NewSparkPullRequestBuilder/build/apache-maven-3.3.3/bin/mvn:
No such file or directory
Error while getting version string from Maven:
```
Maven tarball cannot be downloaded or uncompressed.
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