Apache Storm 2.2.1 Released

The Apache Storm community is pleased to announce that version 2.2.1 has been released and is available from the downloads page.

This is a maintenance release that includes a number of important bug fixes that improve Apache Storm's performance, stability and fault tolerance. We encourage users of previous versions to upgrade to this latest release.


Special thanks are due to all those who have contributed to Apache Storm -- whether through direct code contributions, documentation, bug reports, or helping other users on the mailing lists. Your efforts are much appreciated.

Changes in this Release


  • [STORM-3553] - Upgrade JQuery to 3.5.1
  • [STORM-3663] - Topology with Mockito 1.x fails to run unit tests
  • [STORM-3704] - Cosmetic: columns shifted in "Topology summary" table
  • [STORM-3763] - Backpressure message ignored by the receiver caused the topology to not progress
  • [STORM-3767] - NPE on getComponentPendingProfileActions
  • [STORM-3785] - Rate metrics are wrongly divided by 1000000