Drone agent restarting

Drone Support
1

Hello,

I have recently started using Drone on a project for testing and building services from a monorepo. Our services being coded in multiple languages, I had to do some tricks to get where I wanted. Since I’ve started using Matrix builds to separate each service I have encountered a bug with the Drone Agent where the Docker container randomly restarts multiple times before finally starting to build.

I have checked the Agent logs and found this:

{"time":"2018-09-19T09:30:23Z","level":"debug","repo":"CaliOpen/Caliopen","build":"90","id":"4557","error":"","exit_code":0,"message":"updating pipeline status"}
{"time":"2018-09-19T09:30:23Z","level":"debug","repo":"CaliOpen/Caliopen","build":"90","id":"4557","message":"stop listening for cancel signal"}
{"time":"2018-09-19T09:30:23Z","level":"debug","repo":"CaliOpen/Caliopen","build":"90","id":"4557","message":"updating pipeline status complete"}
{"time":"2018-09-19T09:30:23Z","level":"debug","message":"request next execution"}
{"time":"2018-09-19T09:30:23Z","level":"debug","repo":"CaliOpen/Caliopen","build":"90","id":"4557","message":"pipeline done"}
panic: runtime error: index out of range

goroutine 24 [running]:
main.(*runner).run(0xc420486280, 0xbf1e40, 0xc420207780, 0x0, 0x0)
	/go/src/github.com/drone/drone/cmd/drone-agent/agent.go:182 +0x170d
main.loop.func2(0xc4202af010, 0xc4202aee9c, 0xbf43a0, 0xc42027cee0, 0xc4201d1a40, 0x0, 0x0, 0xc4202aef70, 0xc4202aefd0)
	/go/src/github.com/drone/drone/cmd/drone-agent/agent.go:132 +0x193
created by main.loop
	/go/src/github.com/drone/drone/cmd/drone-agent/agent.go:137 +0x910
{"time":"2018-09-19T09:30:24Z","level":"debug","message":"request next execution"}
panic: runtime error: index out of range

The drone.yml can be found here.

Thank you for your help!

2

We’re hitting this as well, currently investigating.

Agent is known to have unstable network connection.

3

Narrowed to a custom git clone logic.

It’s failing when the event is not in the git plugin event

During deployment :

Works :

clone:
  git:
    image: plugins/git:next
    when:
      event: [ push, pull_request, tag ]
  git:
    image: fpfis/true
    when:
      event: [ deployment ]

fails :

clone:
  git:
    image: plugins/git:next
    when:
      event: [ push, pull_request, tag ]

We made it … boolean as containers :slight_smile:

4

So far I made it to https://github.com/drone/drone/blob/master/cmd/drone-agent/agent.go#L478 cc @bradrydzewski , Stages doesn’t seem to be set.

5

You are totally right, I am able to reproduce the error with a custom clone logic similar to yours.

However, I also faced the problem when using a non-conditional git clone step. I thought it was related to Matrix builds, but I haven’t investigated much as I’m currently moving away from them.

6

Ok so this is confirmed ! I opened https://github.com/drone/drone/issues/2513 mentioning your issue, hope you don’t mind.