clientSuite.TearDownTest: mongodb has exited without being killed

[Aaron Bentley]

Test teardown dies with:
mongodb has exited without being killed

As seen here:
http://reports.vapour.ws/releases/issue/57b76d8d749a567666e868ea

[LOG] 0:00.139 INFO juju.state initializing state server environment deadbeef-0bad-400d-8000-4b1d0d06f00d
[LOG] 0:00.146 DEBUG juju.state closed state without error
... Panic: read tcp 127.0.0.1:39662->127.0.0.1:39302: read: connection reset by peer (PC=0x45E3CE)

/usr/lib/go-1.6/src/runtime/asm_amd64.s:472
  in call32
/usr/lib/go-1.6/src/runtime/panic.go:443
  in gopanic
/home/ubuntu/juju-core_1.25.7/src/github.com/juju/juju/provider/dummy/environs.go:755
  in environ.Bootstrap
/home/ubuntu/juju-core_1.25.7/src/github.com/juju/juju/environs/bootstrap/bootstrap.go:139
  in Bootstrap
/home/ubuntu/juju-core_1.25.7/src/github.com/juju/juju/juju/testing/conn.go:276
  in JujuConnSuite.setUpConn
/home/ubuntu/juju-core_1.25.7/src/github.com/juju/juju/juju/testing/conn.go:108
  in JujuConnSuite.SetUpTest
api_test.go:43
  in baseSuite.SetUpTest
/usr/lib/go-1.6/src/runtime/asm_amd64.s:472
  in call32
/usr/lib/go-1.6/src/reflect/value.go:303
  in Value.Call
/usr/lib/go-1.6/src/runtime/asm_amd64.s:1998
  in goexit

----------------------------------------------------------------------
FAIL: <autogenerated>:146: clientSuite.TearDownTest

/home/ubuntu/juju-core_1.25.7/src/github.com/juju/testing/mgo.go:600:
    c.Assert(err, jc.ErrorIsNil)
... value *errors.Err = &errors.Err{message:"inst.Dial() failed", cause:(*errors.errorString)(0xc820960450), previous:(*errors.errorString)(0xc820960450), file:"github.com/juju/testing/mgo.go", line:494} ("inst.Dial() failed: no reachable servers")
... error stack:
 no reachable servers
 github.com/juju/testing/mgo.go:494: inst.Dial() failed

----------------------------------------------------------------------
PANIC: client_test.go:2424: clientSuite.TestClientSetServiceConstraints

[Anastasia (anastasia-macmood)]

This has not been seen on master since 21 August 2016.

[Aaron Bentley (abentley)]

This was since seen on September 6, implying it's more rare now, but still present.

[Tim Penhey (thumper)]

Marking incomplete due to inability to expire immediately, and we haven't seen this for a while.

[Launchpad Janitor (janitor)]

[Expired for juju because there has been no activity for 60 days.]