bot errors when attempting to automatically trigger lite build

[richardlau]

It looks like recent PR's raised by collaborators (e.g. nodejs/node#26992 (comment)) are getting this comment:

Sadly, an error occurred when I tried to trigger a build. :(

[phillipj]

Found this in the logs:

16:49:15.309Z ERROR bot: Error while triggering Jenkins build (req_id=955fe640-5242-11e9-a673-1d9c0b118da9, pr=nodejs/node/#26992, action=pull_request.opened)
    Error: Expected 200 from Jenkins, got 400
        at Request.request.post [as _callback] (/.../github-bot/scripts/trigger-jenkins-build.js:73:17)

Haven't dug into the details yet, but seeing that same type of error has increased a lot since yesterday, I'm starting to suspect it's due to some recent changes in the bot code or Jenkins.

03:04:19.071Z ERROR bot: Error while triggering Jenkins build (req_id=57a65730-51cf-11e9-a673-1d9c0b118da9, pr=nodejs/node/#26974, action=pull_request.opened)
03:20:18.277Z ERROR bot: Error while triggering Jenkins build (req_id=933cf090-51d1-11e9-a673-1d9c0b118da9, pr=nodejs/node/#26976, action=pull_request.opened)
10:28:16.390Z ERROR bot: Error while triggering Jenkins build (req_id=5c91eaf0-520d-11e9-a673-1d9c0b118da9, pr=nodejs/node/#26978, action=pull_request.opened)
13:19:47.621Z ERROR bot: Error while triggering Jenkins build (req_id=5297abd0-5225-11e9-a673-1d9c0b118da9, pr=nodejs/node/#26980, action=pull_request.opened)
14:40:35.765Z ERROR bot: Error while triggering Jenkins build (req_id=9c4ef980-5230-11e9-a673-1d9c0b118da9, pr=nodejs/node/#26982, action=pull_request.opened)
14:54:30.862Z ERROR bot: Error while triggering Jenkins build (req_id=8e513580-5232-11e9-a673-1d9c0b118da9, pr=nodejs/node/#26983, action=pull_request.opened)
14:55:54.661Z ERROR bot: Error while triggering Jenkins build (req_id=c05773f0-5232-11e9-a673-1d9c0b118da9, pr=nodejs/node/#26984, action=pull_request.opened)
15:43:53.032Z ERROR bot: Error while triggering Jenkins build (req_id=73b424b0-5239-11e9-a673-1d9c0b118da9, pr=nodejs/node/#26986, action=pull_request.opened)
16:04:09.647Z ERROR bot: Error while triggering Jenkins build (req_id=490af100-523c-11e9-a673-1d9c0b118da9, pr=nodejs/node/#26988, action=pull_request.opened)
16:17:04.874Z ERROR bot: Error while triggering Jenkins build (req_id=170f4f00-523e-11e9-a673-1d9c0b118da9, pr=nodejs/node/#26989, action=pull_request.opened)
16:49:15.309Z ERROR bot: Error while triggering Jenkins build (req_id=955fe640-5242-11e9-a673-1d9c0b118da9, pr=nodejs/node/#26992, action=pull_request.opened)
17:17:50.481Z ERROR bot: Error while triggering Jenkins build (req_id=941eb6e0-5246-11e9-a673-1d9c0b118da9, pr=nodejs/node/#26994, action=pull_request.opened)

[refack]

Ok. Been thinking hard what did I do that could break this... I thought to myself "nothing", but then I figured it out... I reduced the number of required parameters to trigger node-test-pull-request-lite-pipeline.

tl;dr is working again:

[phillipj]

Ooooh thanks a bunch!