Running locally (./run.sh foo) I get
```
[2020-02-25 11:02:26 -0500] [INFO] [39732] main thread
[2020-02-25 11:02:26 -0500] [INFO] [39732] [{:tid=>1}] foo
[2020-02-25 11:02:26 -0500] [INFO] [39732] [{:tid=>2}] foo
[2020-02-25 11:02:26 -0500] [INFO] [39732] [{:tid=>5}] foo
[2020-02-25 11:02:26 -0500] [INFO] [39732] [{:tid=>3}] foo
[2020-02-25 11:02:26 -0500] [INFO] [39732] [{:tid=>4}] foo
[{:tid=>1, :message=>"foo"},
 {:tid=>2, :message=>"foo"},
 {:tid=>3, :message=>"foo"},
 {:tid=>4, :message=>"foo"},
 {:tid=>5, :message=>"foo"}]
```