jenkins "Attempt to (de-)serialize anonymous class" log message
jenkins "Could not attach ''nodes/master/pipeline-timings.txt'' to support bundle" error message
blueocean junit test reporting blank when following link from classic ui -> BO
jenkins "ALPN callback dropped" error message in logs
jenkins ssh-slave plugin stack trace
It looks like there may be a show stopper problem with envinject 2.1.6 and core 2.121.3. envinject appears to have a fix for the problem but a core change is also required. This issue suggests that the problem is resolved in 2.135.