Hi everyone,

Please review and vote on the release candidate #4 for the version 2.2.0,
as follows:
  [ ] +1, Approve the release
  [ ] -1, Do not approve the release (please provide specific comments)
The complete staging area is available for your review, which includes:
  * JIRA release notes [1],
  * the official Apache source release to be deployed to dist.apache.org [2],
which is signed with the key with fingerprint B98B7708 [3],
  * all artifacts to be deployed to the Maven Central Repository [4],
  * source code tag "v2.2.0-RC4" [5],
  * website pull request listing the release and publishing the API
reference manual [6].
  * Java artifacts were built with Maven 3.5.0 and OpenJDK/Oracle JDK
  * Python artifacts are deployed along with the source release to the
dist.apache.org [2].

The vote will be open for at least 72 hours. It is adopted by majority
approval, with at least 3 PMC affirmative votes.


[1] https://issues.apache.org/jira/secure/ReleaseNote.jspa?p
[2] https://dist.apache.org/repos/dist/dev/beam/2.2.0/
[3] https://dist.apache.org/repos/dist/release/beam/KEYS
[4] https://repository.apache.org/content/repositories/orgapachebeam-1025/
[5] https://github.com/apache/beam/tree/v2.2.0-RC4
[6] https://github.com/apache/beam-site/pull/337