For historical reasons, Jenkins still ships with old, deprecated
protocols, JNLP1-connect, JNLP2-connect, and JNLP3-connect. These all
have fundamental issues and known bugs. They were all superseded by the
JNLP4-connect protocol released in Jenkins 2.27 over three years ago
(October 2016). They have all been deprecated and unsupported since
Jenkins 2.75 over two years ago. Since then there have been UI messages
and an administrative monitor strongly discouraging their use. (See more
information about the protocols at
As part of cleaning up technical debt I propose to remove these
protocols. Does anyone have any concerns? If you do, please share use
case or configuration details.
There is a proposal to add WebSockets as another agent connection
) This may cover use cases where someone still uses the older protocols.
We could make the removal of the old protocols dependent on completion
of WebSocket support.
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