Garbled/truncated output

[jshuping]

First- your branch rocks! Thanks a bunch for working on this.

I've been testing parallel tasks against 10+ hosts, and the output from each host is being jumbled together, about every 5th line.

The code:

@runs_parallel
def test():
    run('echo "This is a longer longer longer string"')

Snippet 0: normal output, like when run against only a few hosts

[qa-foo-www3] out: This is a longer longer longer string
[qa-foo-www3] out:
[qa-foo-www8] out: This is a longer longer longer string
[qa-foo-www8] out:

Snippet 1: output sometimes appears interleaved

[qa-foo-www8] out: This is a longer longer longer string
[qa-foo-www8] out:
[qa-foo-www5] run: echo "This is a longer longer longer string"
[qa-bar-app1] out: nh[qa-foo-www7] out: Tish iiss ia sl oan gleorn glero nlgoenrg elr onlgoenrg esrt rsitnrgi
[qa-foo-www7] out:
[qa-foo-www7] out: [qa-foo-www4] run: echo "This is a longer longer longer string"

Snippet 2: too much output? usually only 2 lines per host in this example

[qa-bar-app1] out: [qa-bar-app1] out: This is a longer longer longer string
[qa-bar-app1] out:

Snippet 3: output seems to be missing, www9's middle chunk of output is nowhere to be seen

[qa-foo-www2] out: [qa-foo-www9] out: Th
[qa-foo-www9] out: longer string
[qa-foo-www9] out:

Any insight or a fix would be greatly appreciated!
Cheers,
John