$ cat /etc/issue
Ubuntu 18.04.3 LTS \n \l
$ reprepro --version
reprepro: This is reprepro version 5.1.1
$ ./gradlew zookeeper-pkg
BUILD SUCCESSFUL in 6m 11s
6 actionable tasks: 6 executed
$ ./gradlew repo
> Task :apt FAILED
Unknown file type: '278e9876acb17f94be4d2753246254e6 249536 debug optional zookeeper-native-dbgsym_3.4.13-1_amd64.ddeb', assuming source format...
Warning: File 'zookeeper-native-dbgsym_3.4.13-1_amd64.ddeb' looks like source but does not start with 'zookeeper_'!
Ignoring buildinfo file: 'zookeeper_3.4.13-1_amd64.buildinfo'!
'zookeeper-native-dbgsym_3.4.13-1_amd64.ddeb' looks like part of an source package, but no dsc file listed in the .changes file!
There have been errors!
Created directory "/home/sekikn/repos/bigtop/output/apt/db"
FAILURE: Build failed with an exception.
Script '/home/sekikn/repos/bigtop/packages.gradle' line: 823
* What went wrong:
Execution failed for task ':apt'.
> Process 'command 'reprepro'' finished with non-zero exit value 255