I have seen this warning a few times whilst deploying new versions of Jenkins to a "production" like environment with active users.

      Unknown dispatcher client Id 'jenkins-blueocean-core-js-1503729688326-nynevg29wh5ea2dtpgb9' on HTTP session 'node010hqjmwpei4cr1psa4uifdhqly0'. Creating a new one. Make sure you are calling 'connect' before 'listen' and that HTTP sessions are being maintained between 'connect' and 'configure' calls. SSE client reconnects will not work - probably fine if running in non-browser/test mode.
      

      Filing as this appears that it may indicate a bug somewhere in some SSE Gateway code.

          [JENKINS-46557] Unknown dispatcher client Id

          R. Tyler Croy created issue -
          R. Tyler Croy made changes -
          Remote Link New: This issue links to "#21 (Web Link)" [ 17615 ]
          James Dumay made changes -
          Resolution New: Fixed [ 1 ]
          Status Original: Open [ 1 ] New: Resolved [ 5 ]

            tfennelly Tom FENNELLY
            rtyler R. Tyler Croy
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