chia7712 opened a new pull request #9610:
URL: https://github.com/apache/kafka/pull/9610
```
> Failed to apply plugin [class
'com.github.spotbugs.snom.SpotBugsBasePlugin']
> Gradle version Gradle 5.1.1 is unsupported. Please use Gradle 5.6 or
later.
```
```com.github.spotbugs.snom.SpotBugsBasePlugin``` requires gradle 5.6+ but
the gradle supported by travis is 4.0 or 5.1.1
(https://docs.travis-ci.com/user/reference/trusty/#gradle-version and
https://docs.travis-ci.com/user/reference/xenial/)
However, we don't need to call ```gradle wrapper``` since ```gradlew```
already exists in our project.
### Committer Checklist (excluded from commit message)
- [ ] Verify design and implementation
- [ ] Verify test coverage and CI build status
- [ ] Verify documentation (including upgrade notes)
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