unit-c3-12: 18:03:58 INFO unit.c3/12.juju-log returncode: 0
unit-c3-12: 18:03:58 INFO unit.c3/12.juju-log Unhandled exception in action migrate
unit-c3-12: 18:03:58 DEBUG unit.c3/12.migrate Traceback (most recent call last):
unit-c3-12: 18:03:58 DEBUG unit.c3/12.migrate   File "/var/lib/juju/agents/unit-c3-12/charm/actions/migrate", line 102, in main
unit-c3-12: 18:03:58 DEBUG unit.c3/12.migrate     migrate(params)
unit-c3-12: 18:03:58 DEBUG unit.c3/12.migrate   File "/var/lib/juju/agents/unit-c3-12/charm/actions/migrate", line 52, in migrate
unit-c3-12: 18:03:58 DEBUG unit.c3/12.migrate     res = dj.manageshell("migrate --noinput")
unit-c3-12: 18:03:58 DEBUG unit.c3/12.migrate   File "/var/lib/juju/agents/unit-c3-12/charm/reactive/helpers/dj.py", line 52, in manageshell
unit-c3-12: 18:03:58 DEBUG unit.c3/12.migrate     log("output: {!r}".format(result.stdout))
unit-c3-12: 18:03:58 DEBUG unit.c3/12.migrate   File "/usr/local/lib/python3.5/dist-packages/charmhelpers/core/hookenv.py", line 102, in log
unit-c3-12: 18:03:58 DEBUG unit.c3/12.migrate     subprocess.call(command)
unit-c3-12: 18:03:58 DEBUG unit.c3/12.migrate   File "/usr/lib/python3.5/subprocess.py", line 557, in call
unit-c3-12: 18:03:58 DEBUG unit.c3/12.migrate     with Popen(*popenargs, **kwargs) as p:
unit-c3-12: 18:03:58 DEBUG unit.c3/12.migrate   File "/usr/lib/python3.5/subprocess.py", line 947, in __init__
unit-c3-12: 18:03:58 DEBUG unit.c3/12.migrate     restore_signals, start_new_session)
unit-c3-12: 18:03:58 DEBUG unit.c3/12.migrate   File "/usr/lib/python3.5/subprocess.py", line 1551, in _execute_child
unit-c3-12: 18:03:58 DEBUG unit.c3/12.migrate     raise child_exception_type(errno_num, err_msg)
unit-c3-12: 18:03:58 DEBUG unit.c3/12.migrate OSError: [Errno 7] Argument list too long