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Jakarta WebSocket 2.1 (under development)

Jakarta WebSocket defines a API for Server and Client Endpoints for the WebSocket protocol (RFC6455).


The plan for the release is to tackle the open issues with a view to implementing as many as possible in the time available. A rough priority order for this being:

  • Fixing bugs in the existing API
  • Clarifying existing behaviour
  • Adding new features

Backwards compatibility

None known at this time.

Optional features


Minimum Java SE version

The JDK version required will be aligned with Jakarta EE 10.

TCK Updates

The following TCK updates will be required:

  • Updated signatures
  • New tests for any new features

Release Record

Release Record

Compatible Implementations

  • Eclipse Tyrus. Version TBD
  • Apache Tomcat 10.1.x ?


Plan Review

The Plan Review Specification Committee Ballot concluded successfully on 2021-05-14 with the following results.

Representative Representative for: Vote
Kenji Kazumura Fujitsu +1
Dan Bandera, Kevin Sutter IBM +1
Ed Bratt, Dmitry Kornilov Oracle no vote
Andrew Pielage, Matt Gill Payara +1
Scott Stark, Mark Little Red Hat no vote
David Blevins, Jean-Louis Monteiro Tomitribe +1
Ivar Grimstad EE4J PMC +1
Marcelo Ancelmo, Martijn Verburg Participant Members +1
Werner Keil Committer Members +1
Dr. Jun Qian Enterprise Members +1
Total 8

The ballot was run in the mailing list

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