Github user michaelandrepearce commented on the issue:
https://github.com/apache/activemq-artemis/pull/1263
@clebertsuconic yeah, checkstyle came back on the build, earlier just
wasn't even doing anything and just consistently complained
```
ERROR] [ERROR] Some problems were encountered while processing the POMs:
[ERROR] Unresolveable build extension: Plugin
org.apache.felix:maven-bundle-plugin:3.3.0 or one of its dependencies could not
be resolved: Failure to find org.apache.felix:maven-bundle-plugin:jar:3.3.0 in
http://sevntu-checkstyle.github.io/sevntu.checkstyle/maven2 was cached in the
local repository, resolution will not be reattempted until the update interval
of sevntu-maven has elapsed or updates are forced @
```
And this magically stopped and is building again now.
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